Tim S.a.
One of Brazil's biggest mobile and broadband carriers, TIM Brasil offers cell plans, home internet, and digital services to millions of Brazilians under the TIM brand. It arrived in 1995, after the breakup of the state-owned Telebrás system, and began selling service in 1998 — becoming the first Brazilian mobile operator to cover every state by 2002. Fun quirk: its name stands for Telecom Italia Mobile, and the Italian parent even brought Web inventor Tim Berners-Lee to its 2016 rebranding event.
ADR representing 5 ordinary shares
20-F · Fiscal year ended Dec 31, 2025 · SEC filing ↗
The original filing sections are available below.
We are exposed to market risk from changes in both foreign currency exchange and interest rates. We are exposed to foreign exchange rate risk mainly because certain of our costs are denominated in currencies (U.S. dollars) other than those in which we earn revenues (primarily re…
We are exposed to market risk from changes in both foreign currency exchange and interest rates. We are exposed to foreign exchange rate risk mainly because certain of our costs are denominated in currencies (U.S. dollars) other than those in which we earn revenues (primarily reais). Similarly, we are subject to market risk deriving from changes in interest rates, which may affect the cost of our financing. Since 1999, we began entering into hedging agreements, derivative instruments such as foreign exchange forward contracts, foreign currency options, interest rate swaps and forward rate agreements, to manage these market risks, covering payments of principal on our foreign exchange, when existent, denominated indebtedness. We also have entered into arrangements to hedge market risk deriving from changes in interest rates for some of our debt obligations. We do not hold or issue derivative or other financial instruments for trading purposes. Interest Rate Risk On December 31, 2025, the amount of our outstanding debt which accrued interest at the CDI and IPCA floating interest rates totaled R$2,779 million, compared to R$3,036 million for the year ended December 31, 2024. On the same date, we had cash and cash equivalents and marketable securities in the amount of R$5,884 million in instruments accruing interest at the CDI rate, as compared to R$5,693 million on December 31, 2024. Over a one-year period, before accounting for tax expenses, a hypothetical, instantaneous and unfavorable change of 100 basis points in interest rates applicable to our financial assets and liabilities on December 31, 2025, would have resulted in a variation of R$27.8 million in our interest expenses from financial contracts and a variation of R$58.8 million in our income from financial investments (assuming that this hypothetical 100 basis point movement in interest rates uniformly applied to each “homogenous category” of our financial assets and liabilities and that such movement in interest rates was sustained over the full one-year period). For further information on our interest rate risks and related sensitivity analysis, see Note 36 to our audited financial statements. Exchange Rate Risk As of December 31, 2025, we did not have any outstanding unhedged financial loans denominated in foreign currency and were thus not exposed to exchange rate risk based on our loans. We enter into hedging agreements to hedge our borrowings denominated in foreign currency, when existent, and thus have limited our exchange rate exposure regarding such borrowings. Our revenues are earned almost entirely in real, and we have no material foreign currency-denominated assets. We acquire our equipment and handsets from global suppliers, the prices of which are primarily denominated in U.S. dollars. Thus, we are exposed to foreign exchange risk arising from our need to make substantial dollar-denominated expenditures, particularly for imported components, equipment and handsets, that we have limited capacity to hedge. In order to hedge part of the exchange rate risk linked to capital expenditures and operating expense, a bandwidth of -/+ 15% is generally negotiated into our agreements in order to minimize effects of exchange rate fluctuations on the acquisition costs of equipment. As of December 31, 2025, we did not have call options. For further information on our exchange rate risks and related sensitivity analysis, see Note 36 to our audited financial statements.
A. [Reserved] B. Capitalization and Indebtedness Not applicable. C. Reasons for the Offer and Use of Proceeds Not applicable. D. Risk Factors Summary of Risk Factors This section is intended to be a summary of more detailed discussions contained elsewhere in this annual report.…
A. [Reserved] B. Capitalization and Indebtedness Not applicable. C. Reasons for the Offer and Use of Proceeds Not applicable. D. Risk Factors Summary of Risk Factors This section is intended to be a summary of more detailed discussions contained elsewhere in this annual report. The risks described below are not the only ones we face. Our business, results of operations or financial condition could be harmed if any of these risks materializes and, as a result, the trading price of our shares and our ADSs could decline. Summary of Risks Relating to our Business · We may be unable to successfully implement our business strategy. · Future partnerships or joint ventures that we enter into may not bring the expected financial results and could cause harm to our image as well as financial costs. · Any acquisitions or investments in other companies, products or technologies could require significant management attention, disrupt our business, dilute stockholder value, and adversely affect our operating results. · We face various risks related to health epidemics, pandemics and outbreaks, which may have material adverse effects on our business, financial condition, results of operations and cash flows. · Goodwill impairments may be required in relation to acquired businesses. · We face increasing competition from other providers and services, which may adversely affect our results of operations. · We may be unable to respond to the trend towards consolidation in the Brazilian telecommunications market. · We may face difficulties responding to new telecommunications technologies. · Our operations depend on our ability to efficiently operate our systems and controls that are subject to failure that could affect our business and our reputation. · Our business is dependent on our ability to expand our services while maintaining the quality of the services provided and a positive customer experience. · We face various cyber-security risks that, if not adequately addressed, could have an adverse effect on our business. · We depend on data centers operated by third parties and third-party cloud computing platforms, and any disruption in the operation of these facilities or platforms or access to the Internet would adversely affect our business. · Certain debt agreements contain financial covenants and any default under such debt agreements may have a material adverse effect on our financial condition and cash flows. · Due to the nature of our business, we are exposed to numerous lawsuits, administrative proceedings, consumer claims and tax-related proceedings. · Any modification or termination of our ability to use the “TIM” trade name may adversely affect our business and operating results. · We are subject to credit risk with respect to our customers. · We may be subject to liability related to outsourcing certain functions to third-party service providers. · We depend on key suppliers, certain inputs and contractual relationships with other telecommunications providers which are critical to our ability to provide telecommunications services to our customers or may have a material adverse effect on our operations. · Our operations could be suspended or interrupted as a result of natural or man-made disasters or other unexpected events, such as those related to climate change. · We use demand forecasts to make investments, however such forecasts may ultimately be inaccurate due to economic volatility and result in lower revenues than expected. · Our governance and compliance processes may fail to prevent regulatory penalties and reputational harm. · Improper use of our networks could adversely affect our costs and results of operations. · We may be unable to implement our plans to expand and enhance our existing networks in Brazil in a timely manner or without unanticipated costs, which could hinder or prevent the successful implementation of our business plan and adversely affect our results of operations. Summary of Risks Relating to the Brazilian Telecommunications Industry · We are subject to increased regulation as a result of being classified as an economic group with significant market power in certain markets by ANATEL. · As a telecommunications provider and a publicly traded company in Brazil, we are subject to extensive legal and regulatory obligations in the performance of our activities which may limit our flexibility in responding to market conditions, competition and changes in our cost structure or with which we may be unable to comply. · The Brazilian government under certain circumstances may terminate our authorizations or we may not receive renewals of our authorizations. · Actual or perceived health risks or other problems relating to mobile telecommunications technology could lead to litigation or decreased mobile communications usage, which could harm us and the mobile industry as a whole. Summary of Risks Relating to Brazil · Risks related to Brazilian economic and political conditions may negatively affect our business. · The Brazilian government has exerted significant influence over the Brazilian economy and continues to do so. This involvement may have an adverse effect on our activities, our business and on the market prices of our shares and ADSs. · Changes in Brazilian tax laws may have an adverse impact on the taxes applicable to our business and over our prices. · Inflation, and government measures to curb inflation, may adversely affect the Brazilian economy and capital market, our business and operations and the market prices of our common shares or the ADSs. · Exchange rate movements and interest rate fluctuation may have an adverse effect on our business and the market prices of our shares or the ADSs. · The effects of the weak domestic economy could reduce purchases of our products and services and adversely affect our results of operations, cash flows and financial condition. · We may be impacted by volatility in the global financial markets. · Developments and the perception of risk in other countries may adversely affect the Brazilian economy and market price of Brazilian issuers’ securities. Summary of Risks Relating to our Common Shares and the ADSs · Our controlling shareholder has power over the direction of our business. · Holders of our ADSs are not entitled to attend shareholders’ meetings and may only vote through the depositary. · Holders of our ADSs or common shares in the United States may not be entitled to participate in future preemptive rights offerings. · Cash dividends, interest on shareholders’ equity and other cash distributions, as well as judgments seeking to enforce our obligations in respect of our shares or ADSs in Brazil will be payable only in reais. · Holders of ADSs or common shares could be subject to Brazilian income tax on capital gains from sales of ADSs or common shares. · An exchange of ADSs for common shares risks loss of certain foreign currency remittance and Brazilian tax advantages. Risks Relating to our Business We may be unable to successfully implement our business strategy. Our business will be adversely affected if we are unable to successfully implement our strategic objectives and factors beyond our control may prevent us from doing so. Our business strategy is focused on strengthening cash-flow generation to support growth opportunities and shareholder returns and is built on three core business pillars: (i) Mobile focused on customers by developing our three pillars: a. network, b. service and c. offer; (ii) B2B, expanding selectively by leveraging connectivity, with IoT as an entry point to higher-value digital solutions and services; and (iii) Broadband, pursuing profitable growth with a more efficient and flexible go‑to‑market approach. These pillars are supported by transversal enablers, including Efficiency, with strict discipline in cost control and capital allocation; Artificial Intelligence, applied across operations to enhance customer experience, productivity and data-driven decision-making; and ESG, integrated into business decisions and governance to support long-term value creation. This strategic focus requires sustained execution capabilities, continuous investment decisions and effective coordination across multiple areas, and may be adversely affected by market dynamics, competitive pressures, technological change and operational constraints. The execution of our strategy depends on our ability to sustain the performance of our mobile business, expand B2B solutions beyond traditional connectivity and grow fixed broadband operations under evolving commercial and infrastructure models. Achieving these objectives requires, among other factors, the effective monetization of our customer base, the successful development and commercialization of new products and services, and the ability to adapt go-to-market approaches while maintaining financial discipline. Any inability to execute these initiatives as planned, or to respond effectively to changes in customer demand, competitive behavior or regulatory conditions, could adversely affect our revenues, margins and cash-flow generation. In addition, our strategy is increasingly dependent on the continued evolution of network infrastructure, digital capabilities and organizational processes. While the deployment of advanced technologies such as 5G has progressed beyond initial rollout stages, the ongoing increase in data traffic, the introduction of new network functionalities and the expansion of digital, data-driven and artificial intelligence-based initiatives require continued investments, operational readiness and market acceptance. At the same time, the integration of efficiency targets, artificial intelligence initiatives and ESG considerations into business decisions adds further complexity to execution and governance. Failure to effectively manage these technological, operational and organizational challenges could limit the expected benefits of our strategy and adversely affect our operating performance and long-term value creation. Additional risks related to specific aspects of our strategic execution are discussed in further detail below. Our ability to implement our strategy is influenced by many factors partially or completely outside our control, including: · an increase in the number of competitors due to the entrance of new market participants and/or the improvement in financial strength of existing players in the telecommunication sector that could reduce our market share; · increased competition from mobile virtual network operators which offer telecommunication services to customers by leasing network capacity from traditional network providers, without their own network infrastructure; · increased competition in our main markets that could force us to reduce the prices we charge for our services in order to compete effectively; · our ability to strengthen our competitive position in the Brazilian mobile telecommunications market; · increased competition from global and local OTT providers who offer content and services using the internet, including voice calls and messaging, without owning network infrastructure; · increased competition in our main markets that could reduce the prices we charge for our services and could have an unintended adverse effect on our results; · our ability to efficiently operate and grow our broadband business alongside our original business as a MNO; · we may be unsuccessful migrating our Fiber to the Curb (“FTTC”) broadband legacy customers to FTTH technology in an efficient manner and within the planned time frame, including due to technical or competitive issues; · pursuant to our fixed broadband asset-light strategy, we may be unable to reach our FTTH coverage rollout plan since we are dependent on the network infrastructure capacity available to us, and if the network infrastructure is not deployed as currently expected, our rollout plan will be affected; · our ability to successfully capture the economic value of investments and partnerships in IoT, particularly in B2B settings, including our ability to successfully transition from pilot programs to developing products and services that can generate profit at scale; · our ability to find and partner with IoT providers, given the fragmented IoT market and the limited number of established providers, as well as the complexity of integrating multi-vendor solutions, including data privacy risks; · our ability to select the right business partners for undertaking our strategy; · our ability to develop and introduce new and innovative technologies that are received favorably by the market, and which enable us to provide value-added services that encourage the use of our network; · controls and system technology failures, which could negatively affect our revenues and reputation; · the introduction of transformative technologies that could be difficult for us to keep pace with and which could cause significant decreases in our revenue; · the increasing network capacity demand and therefore our ability to manage the continuous growth of mobile data traffic, which in turn requires further investments in infrastructure or the acquisition of additional radio frequencies in order to maintain network quality, especially in large cities, where population density is higher and the costs of network expansion are considerably high; · the development and expansion of NGSO satellite internet (Non-Geostationary-Satellite Orbit), which may offer significant market and product opportunities in the telecommunications sector by offering broad wide-range coverage at high speed while also disrupting the business of existing providers; · our ability to operate efficiently and to pay or refinance our debt as it comes due, particularly in light of political and economic conditions in Brazil and uncertainties in credit and capital markets; · our ability to most efficiently scale our structure; · our ability to attract and retain qualified personnel; · performance of third-party service providers and key suppliers on which we depend, such as any difficulties we may encounter in our supply and procurement processes, including as a result of the insolvency or financial weakness of our suppliers; · government policy and changes in the regulatory environment or legal framework in Brazil; · the effect of exchange rate and inflation fluctuations; · the outcome of litigation, disputes and investigations in which we are involved or may become involved; · the costs we may incur due to unexpected events, including in situations where our insurance is not sufficient to cover such costs; · large scale adverse events that could cause negative effects, requiring a long recovery period, or which may permanently impact the socioeconomic environment, such as natural disasters, political instability, or pandemics; · the real possibility of an increase in taxes by state governments and the Brazilian Federal Government to balance their financial deficits or to respond to climate change and changes in energy generation; and · our ability to maintain strict discipline in the allocation of capital and resources. As a result of these uncertainties, there can be no assurance that our strategic objectives can effectively be attained in the manner and within the time frame described. Future partnerships or joint ventures that we enter into may not bring the expected financial results and could cause harm to our image as well as financial costs We may enter into relationships with other businesses in order to expand our platform, which could involve preferred or exclusive licenses, additional channels of distribution, or discount pricing or investments in other companies. Negotiating these transactions can be time-consuming, difficult, and expensive, and our ability to close these transactions may be subject to third-party approvals, such as government regulatory approvals, which are beyond our control. Consequently, we can make no assurance that these transactions, once undertaken and announced, will close. Furthermore, our established partnerships are subject to common litigation risks and we can make no assurance that these established partnerships or future partnerships will not become involved in any type of dispute. We may also need to litigate to protect our interests, preserve our intellectual property rights, and obtain information related to products or technology developed in association with our partners, particularly when the relevant partner invests in such products and technologies. This can hinder further research and development, as well as slow down the commercialization of new technologies. Additionally, if the patents are overly broad or not clearly defined, it can lead to legal disputes and can be costly to enforce. It’s important for researchers and companies to carefully consider the potential risks and benefits before filing for patents related to technology research partnerships. Any acquisitions or investments in other companies, products, or technologies could require significant management attention, disrupt our business, dilute stockholder value, and adversely affect our operating results. Our business strategy has included, and may in the future include, acquiring other complementary products, technologies, or businesses. We evaluate and expect in the future to evaluate potential strategic acquisitions and partnerships or joint ventures with, complementary businesses, services or technologies. However, we cannot assure you that any benefits will materialize, and we may suffer losses in connection to the used funds and to the opportunity costs related to such transactions. Acquisitions or investments may result in unforeseen operating difficulties and expenditures, and we may not achieve the anticipated benefits from certain acquisition, partnership and joint venture due to several factors, including: · inability to integrate or benefit from businesses, services, customers or technologies that we acquire or with which we form a partnership or joint venture in a profitable manner; · unanticipated costs or liabilities associated with the acquisition; · inability to finance any businesses, services or technologies that we acquire or with which we form a partnership or joint venture; · difficulty integrating the accounting systems, operations, and personnel of the acquired business; · difficulties and additional expenses associated with supporting legacy products and hosting infrastructure of the acquired business; · diversion of management’s time and resources from other core business concerns; · adverse effects to our existing business relationships with business partners and customers as a result of the acquisition; · the potential loss of key employees; and · use of resources that are needed in other parts of our business. In addition, we may not be successful in identifying acquisition, partnership and joint venture targets or our competitors may be willing or able to pay more than us for acquisitions, which may cause us to lose certain acquisitions that we would otherwise desire to complete. Also, to the extent we pay the purchase price of any acquisition in cash, it would reduce our cash reserves, and to the extent the purchase price is paid with our common shares, it could be dilutive to our shareholders. To the extent we pay the purchase price with proceeds from the incurrence of debt, it would increase our level of indebtedness and could negatively affect our liquidity and restrict our operations. Furthermore, even if any such transaction is consummated, we may be unable to successfully integrate the new operation, business or partnership contemplated thereunder or to realize expected benefits and synergies in a timely and effective manner due to difficulties in negotiating or aligning interests with potential partners or counterparties. We face various risks related to health epidemics, pandemics and outbreaks, which may have material adverse effects on our business, financial condition, results of operations and cash flows. We face various risks related to health crisis such as epidemics, pandemics or outbreaks. These events can trigger changes in consumer behavior related to illness, death, fear and market downturns. Additionally, restrictions intended to slow the spread of a health epidemic, pandemic or outbreak, such as quarantines, government-mandated actions, stay-at-home orders and other restrictions, may lead to: (i) a reduction in demand for our services, (ii) hinder our ability to provide services, (iii) disrupt supply chains; (iv) reduce international trade and business activity; and (v) create volatility in the global and Brazilian capital markets and have a negative impact on the local economy. If significant portions of the workforce are not able to work effectively because of a health crisis, such as in the case of epidemics, pandemics and other outbreaks, including due to illness, quarantine, facility closures, ineffective remote work agreements or technology failures or limits, our operations could be significantly disrupted. Network availability, performance, maintenance, condition, repair and our ability to set up or install new connections may be affected by the effects of increased absenteeism in the field workforce, or by the imposition of restrictions caused by any health epidemics, pandemics and outbreaks, by hindering the movement and access of our field maintenance teams to equipment stations. The supply chain for technology products, and their underlying components (such as spare parts, transmission and switching equipment, appliances and modems) can be impacted by any delay in the manufacturing processes of suppliers in their countries of origin. As a result of health epidemics, pandemics and disease outbreaks, our business could be adversely affected in multiple ways and for extended or unpredictable periods, including due to negative impacts on the global economy, market declines and increased market volatility, which could also impair our ability to refinance indebtedness or access capital on favorable terms. To the extent any health crisis, epidemic, pandemic or outbreak adversely affects our business and financial results, it could also have the effect of heightening many of the other risks described in this “Risk Factors” section, such as those relating to our ability to successfully implement our business strategy (see “—We may be unable to successfully implement our business strategy”) the credit risk of our customers (see “—We are subject to credit risk with respect to our customers”), our dependence on key suppliers and contractual relationships with other telecommunications providers (“—We depend on key suppliers, certain inputs and contractual relationships with other telecommunications providers which are critical to our ability to provide telecommunications services to our customers”) the Brazilian government’s influence over the Brazilian economy (see “—Risks Relating to Brazil—Risks related to Brazilian economic and political conditions may negatively affect our business”) and volatility in global and domestic financial markets. See “—Risks Relating to Brazil— We may be impacted by volatility in the global financial markets” and “—Risks Relating to Brazil—Developments and the perception of risk in other countries may adversely affect the Brazilian economy and market price of Brazilian issuers’ securities.” Goodwill impairments may be required in relation to acquired businesses. We have made business acquisitions in the past and may make further acquisitions in the future. It is possible that the goodwill which has been attributed, or may be attributed, to these businesses may have to be written down if our valuation assumptions are required to be reassessed because of any deterioration in the underlying profitability, asset quality and other relevant matters of the businesses. According to the relevant IFRS accounting standard, impairment testing in respect of goodwill is performed annually, or more frequently if there are impairment indicators present, and comprises a comparison of the carrying amount of the cash-generating unit with its recoverable amount. There can be no assurances that we will not have to write down the value attributed to goodwill in the future, which would adversely affect our results and net assets. We face increasing competition from other providers and services, which may adversely affect our results of operations. We face competition throughout Brazil from many providers in the personal communications service (“PCS”), market. We compete with providers of mobile telecommunication, VoIP services, and landline telecommunications services – including by bundling voice and data to customers in a single offer. Due to this increasing competition, we may incur higher advertising and commercial costs as we attempt to maintain or expand our market share. Other than us, the following main competitors also hold authorizations to provide PCS with national coverage: Claro S.A., under the brand name “Claro”, and Telefônica Brasil S.A., under the brand name “Vivo.” Moreover, all PCS providers with national coverage offer third generation, or 3G, fourth generation, or 4G, and fifth generation, or 5G mobile telecommunications network technology. Following our acquisition of certain mobile assets of Oi Móvel, and the acquisition of Oi Móvel’s remaining mobile assets by Vivo and Claro, we believe that the likelihood of further consolidations in the Brazilian mobile telecommunications market among the main competitors is remote. However, although unlikely, one of the three largest operators may acquire other telecom companies. If further consolidations driven by our main competitors were to occur, those consolidations may favor their strategic advantage with increased market power and access to greater financial resources, thereby weakening our market position. In addition to competition from the main market participants (Vivo and Claro) and established regional players (Algar Telecom and Sercomtel), there are new entrants to the Brazilian mobile market, such as Brisanet, Unifique and Ligga (which launched 5G services in the second half of 2023) and new Mobile Virtual Network Operators (“MVNO”), such as Nubank (which launched telecommunication services in late 2024 that are gradually being made available to the their customer base), which may leverage strengths and customer relationships from other markets to increase competition in the PCS market. The movement of new entrants is recent, and the trend of new entrants may continue in the coming years. New regional entrants could further intensify competition, potentially disrupting the existing market dynamics and breaking the rational equilibrium of supply and demand. Their entry could create price pressure, leading to increased customer acquisition costs and potential margin erosion for current providers. As a result, established companies may be forced to adapt quickly, either by lowering prices, enhancing services, or engaging in strategic partnerships to maintain their competitive position. This increased competition may also impact the overall market balance, as the supply-demand equilibrium becomes more volatile and difficult to predict. We also expect to face increased competition from other services outside the telecommunications industry. Technological changes, such as the development, roll-out, and improvement of 4G and 5G mobile networks, may create new revenue streams but also hinder traditional services, introducing additional sources of competition, as is already the case with services like Voice over LTE (“VoLTE”) calls, messages and SMS. These OTT communication apps are often free of charge (i.e., no subscription fee), accessible by smartphones, and usually allow their users to have access to potentially unlimited messaging and voice services over the internet, by passing traditional and more profitable voice and messaging services. As a result, voice traffic is migrating to data and offers from almost all competitors have started to include unlimited voice, thereby accelerating commoditization. These and other factors, including the regulatory and tax asymmetry, are responsible for the increase in the competitive pressure we are facing in the mobile market. OTT application service providers also leverage existing infrastructures and generally do not operate capital-intensive business models associated with traditional mobile network operators like us. Technological developments have led to significant improvements in the services provided by OTT applications – particularly in speech quality delivered by data communications apps, strengthening their positioning and relevance as competitors. In addition, providers with strong brand capability and financial strengths have turned their attention to the provision of OTT application services. In the long term, if non-traditional mobile voice and data services or similar services continue to increase in popularity, as they are expected to do, and if we and other mobile network operators are not able to address this competition, this could contribute to further declines in mobile monthly average revenue per user (“ARPU”), and lower margins across many of our products and services, thereby having a material adverse effect on our business, results of operations, financial condition and prospects. OTT service providers hold most of the content, the means to create it and the distribution channel. Together with these resources they dedicate themselves to creating new ways for their customers to interact with and consume content. As a result, it can be challenging for network operators, such as us, to design value-added services that are beneficial to our customers. In addition to technology, we may face other hurdles to offer value-added services, such as regulation. Moreover, considering our fixed broadband business, we observe high competition from smaller players aiming to attract customers towards fiber optics, resulting in increased churn rates for traditional players like us, and margin erosion in the FTTH business. Additionally, we expect that the 3.5 GHz spectrum rights acquired by regional providers may provide them with an opportunity to become mobile network operators. We expect that new products and technologies will be developed frequently and that those already established will be in continuous evolution, implying a variety of potential consequences for us. These new outcomes may, in the best scenario, reduce the price of our services by providing lower-cost alternatives or, in the worst scenario, render our products and services obsolete, requiring significant investments in new technologies. If such changes occur, our main competitors in the future may be new participants in the market without the burden of an installed older infrastructure. The amount of investment needed to upgrade our premises and to stay effectively competitive could be significant. Rising competition may increase our churn rate and could continue to adversely affect our market share and margins. Our ability to compete successfully will depend on the effectiveness of our marketing efforts and our ability to anticipate and adapt in a timely manner to developments in the industry, including the technological changes and new services that may be introduced, changes in consumer preferences, demographic trends, economic conditions and discount pricing strategies by competitors. It is difficult to predict which of many possible factors will be important in maintaining our competitive position or what expenditures will be required to develop and provide new technologies, products or services to our customers. If we are unable to compete successfully, our business, financial condition and results of operations will be materially adversely affected. We may be unable to respond to the trend towards consolidation in the Brazilian telecommunications market. The Brazilian telecommunications market has been subject to several movements towards market consolidation since its privatization in 1998. For detailed information on transactions we have undertaken, see “Item 4. Information on the Company—A. History and Development of the Company—Historical Background.” More recently, the economic and regulatory environment faced by telecommunications companies in Brazil could be understood as having played an important role in encouraging a trend towards market consolidation. In 2018, through a new resolution, ANATEL reduced one of the main regulatory barriers to consolidation in the mobile market. Resolution No. 703/2018 changed the spectrum cap regulation by increasing the amount of spectrum bandwidth an operator is allowed to retain, depending on frequency range and applicable antitrust measures. On November 5, 2020, ANATEL Resolution No. 736/2020 amended Resolution No. 703/2018 by establishing new maximum limits for the spectrum for SMP licenses. These changes together with the financial distress of two major participants in the mobile market, Nextel and Oi Group, led to a new wave of mergers and acquisitions activity. Nevertheless, we believe that, following Oi Móvel’s sale of its mobile assets, further consolidations are unlikely to take place in the Brazilian telecommunications market in the near future. In the fixed broadband market, consolidation movements were particularly concentrated in the early years of this decade (2020–2024), driven primarily by transactions between larger operators and smaller regional internet service providers, as well as spin-off transactions aimed at separating integrated operations into customer-focused companies and network-infrastructure-focused companies. In 2025, however, this scenario shifted, with the volume of M&A activity declining and revealing lower underlying organic growth in the sector. This shift has highlighted a more selective and competitive market environment. Looking ahead, potential developments may include a resumption of strategic corporate actions and M&A activity, including transactions in which large national operators could acquire local internet service providers. Such transactions, which have been identified as a potential avenue for further market consolidation, may accelerate the transition to fiber-based networks (FTTH) and generate operational and infrastructure efficiencies for consolidated players. These dynamics could intensify competition in our market and adversely affect our competitive position, growth opportunities and operating performance. We may also consider engaging in M&A activities in response to changes in the competitive environment, as we did through our participation in the acquisition of Oi Móvel’s assets, which could divert management attention and resources away from other aspects of our business. In this regard, potential acquisitions have inherent risks such as increasing leverage and debt service requirements, combining company cultures and facilities, potential exposure to successor liability, and the need to raise additional capital, which may not be possible at that time. Any of these and other factors could adversely affect our ability to achieve the anticipated cash flows at acquired operations or realize other anticipated benefits of acquisitions, which could negatively affect our reputation or operations. We may face difficulties responding to new telecommunications technologies. The Brazilian wireless telecommunications market is experiencing significant technological changes, as evidenced by the following, among other factors: · ongoing improvements in the capacity and quality of digital technology available in Brazil; · shorter time periods between the introduction of new telecommunication technologies and subsequent upgrades or replacements; · the development of user interface (UI), and user experience (“UX”), technology, and also the development of applications that will be responsible for collecting information regarding UX associated with network and device information, and will be used as one of the inputs for the network planning, optimization, and troubleshooting activities; · the development of cloud solutions to provide platform as a service (“PaaS”), software as a service (“SaaS”), or infrastructure as a service (“IaaS”), in order to drive down costs; · the deployment of Voice over NR (VoNR), which increases the quality of voice calls and allows companies to traffic voice as data through their 5G networks; · the deployment of the Radio Access Network (“RAN”) sharing agreements among TIM and other companies (see “Item 4. Information on the Company—B. Business Overview—Site-Sharing and Other Agreements”); · the acquisition of the 100 MHz frequency nationally in the 3.5 GHz band, in addition to 40 MHz blocks in the 2.3 GHz band in the South and Southeast regions of Brazil (excluding São Paulo), and the implementation of the coverage obligations associated to these frequencies (see “Item 4. Information on the Company— History and Development of the Company—Historical Background—5G Auction in 2021”); · the deployment of 5G SA, which requires unprecedented levels of automation across an end-to-end network to fulfill the needs of new services and applications. The 5G SA network needs to be flexible, programmable, and distributable in nature, so that it can provide the necessary flexibility to reduce time-to-market and provide the greatest performance and efficiency gains. As a result of the development of 5G SA, products and services supplied by different providers can be more greatly differentiated as between competitors, as 5G SA better enables the provision of custom services; · the widespread implementation of Embedded Subscriber Identity Module (“eSIM”) technology, which is a small microchip built into phones as an alternative to the conventional physical SIM card, and which will enable our customers to switch faster to other providers, thereby increasing competition; · an increase in market competition in respect of residential fixed ultra-broadband, requiring operators (including former fixed internet providers which had provided services using copper and coaxial technologies) to accelerate investments in fiber capillarity deployments. This factor becomes more significant when considering the country’s continental dimensions, new market opportunities and the need to provide comparable service in capacity and quality to locations far from large centers, thus boosting investments in IP backbone and datacenters. In addition, competitive pressures in the residential fixed ultra-broadband market may further intensify due to the expansion of alternative access technologies, including fixed wireless access (“FWA”) and satellite broadband. Recent developments in 5G-based FWA have enabled operators to more rapidly offer fixed broadband services in areas without fiber coverage, supported by the nationwide authorization of 5G standalone services and accelerated network deployment across numerous municipalities in Brazil, although adoption constraints, such as equipment costs and data-cap limitations, remain. At the same time, low-Earth-orbit (“LEO”) satellite systems are scaling rapidly, with regulatory approvals permitting large-scale satellite constellations to operate in Brazil and expand coverage to underserved and remote regions, thereby providing competitive alternatives to terrestrial networks. These technological developments could broaden consumer choice, alter competitive dynamics and adversely affect our ability to maintain market share, justify investments in fiber capillarity and sustain our operating performance.; · the expansion of the Internet of Things (“IoT”) technology in all of its forms and applications, requiring the creation of new platforms enabling its operation in new areas of the value chain. We are strengthening the IoT ecosystem with new partnerships, using connectivity as an enabler to increase productivity and expand the monetization of our customer base. As of December 31, 2025, we had 5,167 cities enabled for Narrowband Internet of Thing (“NB-IoT”), a long-range and low-power technology recommended for the application of the IoT on a larger scale; and · the acceleration in the use of artificial intelligence (“AI”), and machine learning, to use resources more efficiently, reduce spending and increase agility. We may be unable to keep pace with these technological changes, which could affect our ability to compete effectively, and the investment required to adopt these new technologies will be significant, both of which could have a material adverse effect on our business, financial condition and results of operations. Additionally, emerging technological advancements may have a significant impact on the telecommunications industry. Our future success depends on our ability to adjust to these technological changes. Our operations depend on our ability to efficiently operate our systems and controls that are subject to failure that could affect our business and our reputation. Our success largely depends on the continued and uninterrupted performance of our controls, network technology systems and of certain hardware. Our technical infrastructure (including our network infrastructure and information technology, or IT, systems for mobile telecommunications services) is vulnerable to damage or interruption from information and telecommunication technology failures, power loss, floods, windstorms, fires, terrorism, intentional wrongdoing, human error and similar events. An unexpected increase in volume on our network and systems could cause them to malfunction, such as in periods of increased demand or unexpected circumstances that may reduce our ability to service our infrastructure, such as in a health crisis. Our controls are dependent, not exclusively, on these technological systems and are also subject to interruptions and failures. Unanticipated problems with our controls, or at our facilities, system failures, hardware or software failures, computer viruses or hacker attacks could affect the quality of our services and cause service interruptions. Any of these occurrences could result in reduced user traffic and reduced revenue and could harm our levels of customer satisfaction, our reputation and compliance with certain of our regulatory obligations. Our supply chain for technological product inputs (like spare parts, transmission and commutation equipment, handsets and modems) may be impacted by any delay in the manufacturing process of vendors in their countries of origin, including as a result of a health crisis or military conflicts that could impact logistics and global supply chain. Our operations and reputation could be materially negatively affected by cyber-security threats or our failure to comply with data protection laws, mainly Law No. 13,709/2018 (the Brazilian General Data Protection Law, or “LGPD”), which came into effect on September 18, 2020. However, the administrative sanctions provisions of LGPD only became enforceable as of August 1, 2021, pursuant to Law No. 14,010/2020. Any proceeding or action and related damages could be harmful to our reputation, force us to incur significant expenses, divert the attention of our management, increase our costs of doing business or result in the imposition of financial penalties. In addition, on August 26, 2020, the Brazilian federal executive branch issued Decree No. 10,474/2020, which approved the regulatory framework and governance structure of the National Data Protection Authority (Autoridade Nacional de Proteção de Dados, or the “ANPD”), the authority responsible for regulating and supervising the application of the LGPD, as well as for imposing sanctions in the event of noncompliance with applicable legal rules and obligations. Decree No. 10,474/2020 entered into force on November 6, 2020. The ANPD is currently fully operational and has been actively regulating and enforcing the LGPD. On September 15, 2025, Provisional Measure No. 1,317 reclassified the ANPD as a federal regulatory agency, broadened its prerogatives, instituted the Data Protection Regulation and Oversight Career (Carreira de Regulação e Fiscalização de Proteção de Dados), and reorganized certain positions within the federal executive branch, among other measures. Accordingly, the ANPD is responsible for developing guidelines for the National Policy on the Protection of Personal Data and Privacy, as well as for monitoring compliance with the LGPD and investigating and applying sanctions in the event of data protection violations, including pursuant to Resolution CD/ANPD No. 1, dated October 28, 2021. In addition, the ANPD may issue regulations and procedures relating to the protection of personal data and privacy and is responsible for assessing the impact of personal data processing activities in scenarios that may be deemed to present a high risk to personal data protection principles. As a result of the ANPD’s regulations and enforcement actions, we may be required to modify our business practices and implement additional measures to adapt our personal data processing activities, which could adversely affect our business, financial condition or results of operations. We cannot assure you that our LGPD compliance efforts will be deemed appropriate or sufficient by regulatory authorities or by courts. We carry out continuous assessments to identify any problems related to LGPD compliance and based on the results identified, we have implemented controls in order to achieve full compliance with the requirements of the LGPD. However, deficiencies in the full adoption of data security measures, implementing personal data processing and retention requirements and reporting data measures within a narrow mandatory time frame could lead to disputes with data protection authorities, fines or harm to our reputation. Within the systems we operate on a daily basis, we have gradually increased the use of tools that utilize or benefit from AI in some capacity. Due to the early stage of adoption, alongside many potential opportunities and positive contributions, AI presents various risks and challenges. While we strive to implement AI responsibly and address ethical and legal issues, there can be no assurance that negative outcomes will not emerge. In the current stage of this technology, the use of AI may lead to issues such as harmful content, inaccuracies, bias, intellectual property infringements, defamation, privacy breaches, and cybersecurity vulnerabilities. These issues could result in legal actions and financial losses. However, given that our use of AI is still targeted at our internal operations, and adopted only after consistency tests, any potential negative impacts should be limited. Sophisticated information and processing systems are vital to our growth and our ability to monitor costs, render monthly invoices, process customer orders, provide customer service and achieve operating efficiencies. We cannot assure that we will be able to successfully operate and upgrade our information and processing systems or that they will continue to perform as expected without any failure. A severe failure in our accounting, information and processing systems could impair our ability to collect payments from customers and respond satisfactorily to customer needs, which could adversely affect our business, financial condition and results of operations. Our business is dependent on our ability to expand our services while maintaining the quality of the services provided and a positive customer experience. Our business as a telecommunications services provider depends on our ability to maintain and expand our telecommunications services network. We believe that our expected growth will require, among other aspects: · continuous development of our controls and operational and administrative systems; · efficiently allocate our capital; · increasing marketing activities; · improving our understanding of customer wants and needs; · continuous attention to service quality; · a positive customer experience; · attracting, training and retaining qualified management, technical, customer relations, and sales personnel; · increased network capacity through the new spectrum that we recently acquired and/or more investment in network assets such as 4G and 5G technologies; · increasing network efficiency through infrastructure projects such as the deployment of the RAN sharing agreements among TIM and other companies (see “Item 4. Information on the Company—B. Business Overview—Site-Sharing and Other Agreements”), maintaining the customer experience; · investing in new technologies that can enable efficiencies such as AI; and · expansion of our optical fiber footprint, not only as a main asset for our 5G backhaul, but also as new long-distance routes for backbone resilience and performance. We believe that these requirements will place significant demand on our managerial, operational and financial resources. Failure to manage successfully our expected growth could reduce the quality of our services and result in inadequate customer experience, with adverse effects on our business, financial condition and results of operations. Our operations are also dependent upon our ability to maintain and protect our network. Damage to our network and backup systems could result in service delays or interruptions and limit our ability to provide customers with reliable service over our network. The occurrence of an event that damages our network may adversely affect our business, financial condition and results of operations. We face various cyber-security risks that, if not adequately addressed, could have an adverse effect on our business. We face a range of cybersecurity risks that could result in business disruptions, financial losses or reputational harm. These risks include, among others, the intentional or accidental compromise of our networks and systems by third parties with whom we share data, equipment failures, and the unauthorized access to, disclosure of or loss of sensitive information, including customer, employee or proprietary data, by internal or external actors. We are also vulnerable to cyber-attacks that could degrade our systems, disrupt services, compromise our information technology platforms or introduce malware, such as computer viruses, into our infrastructure. Cyber-attacks targeting companies have increased in frequency, sophistication and potential severity in recent years. The perpetrators of such attacks are not limited to specific groups or individuals and may include employees, third-party service providers or actors operating from jurisdictions where law-enforcement efforts to combat cyber-attacks are limited or ineffective. As cyber-threats continue to evolve, we may be required to make ongoing and significant investments to enhance our cybersecurity measures, technologies and processes, and we may incur substantial costs to investigate, remediate and respond to vulnerabilities or incidents. A material cybersecurity incident, even if temporary, could impair our ability to operate our networks and systems and may result in significant expenses and/or a loss of market share to other communications providers. The costs associated with a major cyber-attack may include expenditures to retain customers and business partners, increased spending on immediate cybersecurity response and remediation measures, reliance on alternative resources, lost revenues due to service interruptions, and litigation, regulatory or enforcement-related expenses. If we fail to adequately prevent, detect or respond to cybersecurity risks, our operational networks and information systems could be compromised, which could have a material adverse effect on our business, financial condition, results of operations and reputation. To mitigate these risks, we maintain a cybersecurity governance framework designed to identify, assess and manage cybersecurity risks, aligned with recognized market standards and best practices, including the NIST Cybersecurity Framework, CIS Critical Security Controls and ISO/IEC 27001, for which we obtained certification in November 2022 and have maintained revalidations in 2023, 2024 and 2025. However, no cybersecurity framework or control environment can eliminate all risks, and our safeguards may be insufficient to prevent or mitigate all cybersecurity incidents. For more information regarding our cybersecurity risk management framework, see “Item 16K. Cybersecurity.” We depend on data centers operated by third parties and third-party cloud computing platforms, and any disruption in the operation of these facilities or platforms or access to the Internet would adversely affect our business. Our business requires ongoing availability and uninterrupted operation of internal and external systems and services. We have adopted new technology infrastructure solutions, which carries with it some risk to business continuity. With the adoption of cloud computing technology, key IT systems are being migrated to the public cloud. Despite cloud computing reducing some risks, such as delays in the supply of equipment by suppliers (like spare parts, servers, etc.), the adoption of cloud computing means that the control and responsibilities for the proper functioning of the systems are shared between us and the third parties. In all cases, the third parties will be responsible for the physical infrastructure, connectivity, energy supply, cooling and all the capabilities related to infrastructure availability. Depending on the cloud service type involved for any specific system (e.g., for IaaS, PaaS, SaaS), other capabilities will be the responsibility of the third party, according to the principles of the Shared Responsibility Model defined by the Cloud Security Alliance, and incorporated into our contracts with the third-party providers These third-party providers may experience connectivity disruption, outages and other performance problems, which may be caused by a variety of factors, including infrastructure changes, human or software errors, viruses, security attacks, fraud, spikes in customer usage and denial of service issues. As such, our success also depends directly on the continuity of the provision of computing capacity and the availability of connectivity between the cloud computing provider’s datacenters, including the connectivity with our datacenters and internal networks. An intermittent failure or complete lack of connectivity or system availability may cause service instability, disruption or inaccessibility of our internal systems, and could adversely affect our revenues, reputation and operating results. Having data hosted on a public cloud also poses a risk to our ability to comply with data protection principles or law (such as the LGPD). As such, our success depends on our ability to certify that cloud providers are adopting security best practices, as well as complying with the terms of data protection laws in accordance with our contractually agreed terms. Certain debt agreements contain financial covenants and any default under such debt agreements may have a material adverse effect on our financial condition and cash flows. Certain of our existing debt agreements contain restrictions and covenants and require the maintenance or satisfaction of specified financial ratios and tests. See “Item 5. Operating and Financial Review and Prospects.” The ability to meet these financial ratios and tests can be affected by events beyond our control, and we cannot assure that we will meet those tests. Failure to meet or satisfy any of these covenants, financial ratios or financial tests, could result in an event of default under these agreements. Our ability to meet these financial ratios and tests can be affected by events beyond our control, and we cannot assure you that we will meet those requirements. Failure to meet or satisfy any of these requirements may have a material adverse effect on our financial condition and cash flows. If we are unable to meet these debt service obligations, or comply with these debt covenants, we could be forced to restructure or refinance this indebtedness, seek additional equity capital or sell assets. Due to the nature of our business, we are exposed to numerous lawsuits, administrative proceedings, consumer claims and tax-related proceedings. Our business exposes us to a variety of lawsuits and other proceedings brought by or on behalf of consumers in the ordinary course of business as a mobile telecommunications provider in Brazil. We are subject to a number of public civil actions and class actions that have been brought against mobile telecommunications providers in Brazil mainly related to network quality, contractual clauses, billing practices, and the use of land to install our network sites. These suits include claims contesting certain aspects of the fee structure of our prepaid plans, hybrid (monthly billed fixed price), or so-called control plans and postpaid plans, which are commonplace in the Brazilian telecommunications industry. Furthermore, we are involved in legal proceedings relating to regulatory matters, including proceedings arising from fines imposed by regulatory authorities. Our litigation portfolio also includes claims involving telecommunications infrastructure and service providers, real estate disputes, as well as alleged breaches of confidentiality. In addition, federal, state and municipal tax authorities have questioned some tax procedures we have adopted and have raised questions regarding the calculation of the basis for certain sector-specific contributions (FUST and FUNTTEL, as each are defined in “Item 4. Information on the Company—B. Business Overview—Taxes on Telecommunications Goods and Services”). As of December 31, 2025, we were subject to 3,332 tax-related lawsuits and administrative proceedings with an aggregate value of R$ R$25,346 million classified as “probable loss” and “possible loss” by our legal advisors. In addition, there are tax proceedings arising from the acquisition of the former Intelig business (currently TIM S.A.) by the former parent company of the TIM Participações group, relating to the purchase price. An adverse outcome in, or any settlement of, these or other lawsuits could result in losses and costs to us, with an adverse effect on our business practices and results of operations. For some of these lawsuits, we were not required to and have not established any provision on our statement of financial position or have established provisions only for part of the amounts in controversy, based on our judgments or opinions of our legal counsel as to the likelihood of winning these lawsuits. In addition, our senior management may be required to devote substantial time to these lawsuits, which they could otherwise devote to our business. See Note 23 to our financial statements. Any modification or termination of our ability to use the “TIM” trade name may adversely affect our business and operating results. Telecom Italia S.p.A., or Telecom Italia, as Licensor, and TIM S.A. and Instituto TIM as Licensees, entered into a trademark license agreement, or the Trademark License Agreement, where Telecom Italia granted the Licensees a non-exclusive and non-transferable license to several trademarks (including the TIM trademark) to: (i) promote and render Licensees’ services, including co-branded services; (ii) use the trademarks as domain names of websites owned by the Licensees, dedicated to the promotion and/or the rendering of the Licensees’ services; (iii) use the TIM trademark in events, campaigns, commercial partnerships, sponsorship projects and other activities in order to promote Licensees’ services; and (iv) use “TIM” as part of Licensees’ corporate names. The Trademark License Agreement is limited to Brazil and valid until December 31, 2026, unless terminated earlier. We are currently in discussions with Telecom Italia regarding the renewal of the Trademark License Agreement. Telecom Italia, who owns the rights to the “TIM” trade name, may prevent us from using the TIM trademark by termination of the Trademark License Agreement. The loss of use of the trademark “TIM” may have a material adverse effect on our business and operating results. We are subject to credit risk with respect to our customers. Our operations depend to a significant extent on the ability of our customers to pay for our services. Under ANATEL regulations, we are allowed to undertake certain measures, such as service suspension and the issuance of collection notice, to reduce customer defaults. If we are unable to undertake measures to limit payment defaults by our subscribers or that allow us to accept new subscribers based on credit history, we will remain subject to outstanding uncollectible amounts, which could have an adverse effect on our results of operations. See “Item 5. Operating and Financial Review and Prospects.” We may be subject to liability related to outsourcing certain functions to third-party service providers. We may be exposed to contingent liabilities due to our outsourcing of certain functions to third-party service providers. Such potential liabilities may involve claims by third-party providers who claim that they are treated as direct employees as well as claims for secondary liability resulting from workplace injury, wage parity and overtime pay complaints. Our financial condition and results of operation may be adversely affected if a material portion of these liabilities are decided against us. The Brazilian Supreme Court has declared the outsourcing of any company’s main activities as legal, which indicates a probable favorable outcome regarding the matter. In any case, regardless of the decision in Supreme Court, we would also be jointly liable with the service provider in connection with any violation of labor obligations related to the outsourced workers. If the contracting of third-party services is considered to involve the main activities of the company, it may be characterized as a direct employment, which would significantly increase our costs and as a result we may be subject to administrative proceedings by the relevant labor authorities and may be required to pay fines to the third-party service providers. We depend on key suppliers, certain inputs and contractual relationships with other telecommunications providers which are critical to our ability to provide telecommunications services to our customers or may have a material adverse effect on our operations. We rely on various vendors to supply network equipment, mobile handsets and accessories necessary for our business. These suppliers may, among other things, delay delivery periods, increase their prices, limit the amounts they are willing or able to supply to us, or suffer disruptions in their own supply chains. If these suppliers are unable or unwilling to provide us with equipment or supplies on a regular basis, we could face difficulties in carrying out our operations, which could negatively affect our results of operations and limit our ability to execute our agreements. Geopolitical, sanitary, financial and sanctions aspects, among others, could cause an interruption of materials and services supply. Supplier exclusivity or dependence increases exposure to risk. Interruption can impact not only the acquisition of new materials and services, but also the maintenance of existing equipment and operations. We rely on certain telecommunications providers and partners, through contractual arrangements, to supply key infrastructure and other services. Termination, non-renewal and/or interruption in negotiation of those agreements, may have a material adverse effect on our business. ANATEL permits such agreements between telecommunications providers in order to avoid unnecessary duplication of networks and infrastructure, and to lower costs and increase the reach of telecommunication services in Brazil. Some (non-exhaustive) examples of these agreements include: · SWAP agreements (exchange of network capacity or assets between operators); · Indefeasible Rights of Use (IRU); · Lease of circuits (e.g., EILD, IP Peering, IP Transit and Satellite bandwidth/capacity); · Co-sites deals with other operators and tower companies; · Rights of use with private companies and public authorities; · Interconnection and co-billing; and · RAN Sharing agreements among TIM and other companies. For detailed information on these contracts see “Item 4. Information on the Company—B. Business Overview—Site-Sharing and Other Agreements.” Furthermore, the constant changes in the telecommunications industry, such as the growth of broadband, may result in a limited supply of equipment essential for the provision of services. The restrictions on the number of manufacturers imposed by the Brazilian government for certain inputs pose certain risks, including susceptibility to currency fluctuations and the imposition of customs or other duties for those inputs which are imported. Inputs produced domestically are available from a limited number of domestic suppliers, and accordingly we are highly dependent upon their ability to accurately forecast domestic demand and manage inventory. The need to hire many key suppliers requires complex deals, detailed and timely analysis of contractual documents and an integrated, end-to-end management process. The potential positive impact of 5G networks on multiple industries, specifically the optimization of energy usage; cloud computing; ultrafast broadband; IoT; innovation, including self-driving cars, transportation; agribusiness; education; health; and factory equipment. The necessary features for a company to benefit from the 5G network supply chain are software-based, and our supply chain is increasingly based on cloud computing and software. Discussions regarding data safety of equipment provided by Chinese suppliers could have side effects across the global information and communication technology (“ICT’) sector, also significantly affecting our supply chain, infrastructure deployment and costs, and impacting the future of the whole industry. Our operations could be suspended or interrupted as a result of natural or man-made disasters or other unexpected events, such as those related to climate change. Our operations may be suspended or interrupted for an indeterminate period in case of adverse events, including as a result of energy shortages, damages to our transmission bases, natural disasters, climate change or other environmental events or natural or man-made disasters, including fire, explosion, vandalism or equipment theft, storms, geopolitical conflict, civil unrest or health crises or any other unexpected damage events. Such impacts may present disproportional geographic impacts, which may vary from impacts to a single address to an entire city or region. These events are consistent with the physical climate-related risks identified through our enterprise risk management processes and disclosed in our CDP Climate Change 2025 response. If we are unable to mitigate or prevent such damages in the event of a natural or man-made disaster and any other unexpected events, the suspension or interruption of our operations could have a material adverse effect on the continuity of our operations, our financial results and the compliance with regulations. In order to avoid or reduce indeterminate periods of suspension or interruption of operations caused by damages to our transmission bases, natural disasters or any other unexpected events, we have implemented an internal policies and procedures aimed at a continuously mapping systemic vulnerabilities, in order to improve the selective process of key projects, intended to expand the robustness of the technical network infrastructure and make it gradually more resilient, as described in our CDP Climate Change 2025 disclosure. We use demand forecasts to make investments, however such forecasts may ultimately be inaccurate due to economic volatility and result in lower revenues than expected. We make certain investments, such as the procurement of materials and the development of our network infrastructure, based on our forecasts of the amount of demand that customers will have for our services at a later date. However, any major changes in the Brazilian economic scenario may affect this demand and therefore our forecasts may turn out to be inaccurate. For example, credit restrictions on the population due to the increase in unemployment rates may affect the decision to acquire new products or services. As a result, it is possible that we may make larger investments based on demand forecasts than were necessary given actual demand at the relevant time, which may directly affect our cash flow. Unanticipated improvements in economic conditions may have the opposite effect and equally pose a risk. The management of our cash and our financial investments are also subject to the country’s economic conditions. We may make financial allocations in which the results of operations are not as expected, generating lower profitability or costs. Our governance and compliance processes may fail to prevent regulatory penalties and reputational harm. We operate in a global environment, as we have agreements with companies all over the world. We have structured governance and compliance processes, which include the review of internal control over financial reporting. However, these processes may not prevent future breaches of all applicable legal, accounting or corporate governance standards. We may be subject to breaches of our Code of Ethics, anti-corruption policies and business conduct protocols and to instances of fraudulent behavior, corrupt practices and dishonesty by our employees, contractors or other agents. Our failure to comply with applicable laws and other standards could subject us to fines, loss of operating licenses and reputational harm. Improper use of our networks could adversely affect our costs and results of operations. We may incur costs associated with the unauthorized and fraudulent use of our networks, including administrative and capital costs associated with detecting, monitoring and reducing the incidence of fraud. Fraud also affects interconnection costs and payments to other carriers for non-billable fraudulent roaming. Improper use of our network could also increase our selling expenses if we need to increase our provision for doubtful accounts to reflect amounts, we do not believe we can collect for improperly made calls. Any increase in the improper use of our network in the future could adversely affect our costs and results of operations. We may be unable to implement our plans to expand and enhance our existing networks in Brazil in a timely manner or without unanticipated costs, which could hinder or prevent the successful implementation of our business plan and adversely affect our results of operations. Our ability to achieve our strategic objectives depends in large part on the successful, timely and cost-effective implementation of our plans to expand and enhance our networks in Brazil. Factors that could affect this implementation include: · our ability to generate cash flow or to obtain future financing necessary to implement our projects; · delays in the delivery of telecommunications equipment and broadband capacity by our vendors; · the failure of the telecommunications equipment supplied by our vendors to comply with the expected capabilities; · delays in obtaining licenses required to carry out construction works and other activities necessary to implement and update our network; · delays resulting from the failure of third-party suppliers or contractors to meet their obligations in a timely and cost-effective manner; and · higher than expected auction prices due to competition between bidders and/or to national policy. Although we believe that our cost estimates and implementation schedule are reasonable, we cannot assure you that the actual costs or time required to complete the implementation of these projects will not substantially exceed our current estimates. Any significant cost overrun, or delay could hinder or prevent the successful implementation of our business plan and result in revenues and net income being less than expected. We employ structured control tools and procedures in order to meet deadlines and avoid impacts on our business and results of operations. Risks Relating to the Brazilian Telecommunications Industry We are subject to increased regulation as a result of being classified as an economic group with significant market power in certain markets by ANATEL In September 2025, ANATEL published Resolution No. 783/2025, which revised the General Plan for Competition Goals (Plano Geral de Metas de Competição, or the “PGMC”, originally approved in 2012 and subsequently revised in 2018 and in 2025). Under Resolution No. 783/2025, we were classified as having significant market power only in the mobile network and roaming markets. See “Item 4. Information on the Company—B. Business Overview—Regulation of the Brazilian Telecommunications Industry—Significant Market Power.” As a result of this classification, we are subject to increased regulatory oversight and specific regulatory obligations. For example, the PGMC requires us to offer roaming services at regulated rates to certain mobile service providers. Compliance with the PGMC and other applicable regulatory obligations could adversely affect our business, financial condition and results of operations. Our radiofrequency use authorizations for the 800 MHz, 900 MHz, 1,800 MHz and 2,100 MHz bands used to provide mobile personal services (Serviço Móvel Pessoal, or “SMP”) began to expire in September 2007 and are renewable for one additional 15-year period. Such renewals require payments, made every two years, corresponding to 2% of our prior year’s net revenue, by way of investments under basic and alternative service plans intended to expand telecommunications penetration in Brazil. ANATEL has taken the position that the revenue base used to calculate this 2% payment should include revenues derived from interconnection, as well as from additional facilities and services. As a result, we are currently disputing the calculation of these radiofrequency authorization renewal payments through administrative and judicial proceedings. Although certain administrative procedures remain pending, ANATEL has denied our appeals and issued Precedent No. 13, establishing that revenues from interconnection and additional facilities and services should be included in the calculation of the amounts due for spectrum license renewals. Judicial proceedings relating to this matter are also ongoing. In December 2018, pursuant to Judgments No. 706 and No. 707, ANATEL approved a new methodology for the segregation of radiofrequency-related revenues. The application of this methodology allows the segregation of revenues associated with significant market power based on the proportion of radiofrequency spectrum held relative to total available spectrum, measured in MHz, and partially addresses the dispute regarding the amounts payable in connection with the initial renewal process. Following the expiration of the second renewal period for radiofrequency use rights, additional administrative and judicial disputes may arise regarding the applicable calculation methodology and deadlines, particularly in light of Law No. 13,879, enacted on October 3, 2019. The Federal Court of Accounts (Tribunal de Contas da União - TCU) has ruled that such renewal processes may be subject to new public bidding procedures. In the interim, ANATEL has granted us and other market participants temporary extensions of radiofrequency use rights pending a final decision on the applicable renewal framework. In addition, ANATEL is currently reviewing the Spectrum Use Regulation (Regulamento de Uso do Espectro – “RUE”), which, together with the revised PGMC, could further intensify competition in the mobile telecommunications market and increase our regulatory obligations. As a telecommunications provider and a publicly traded company in Brazil, we are subject to extensive legal and regulatory obligations in the performance of our activities which may limit our flexibility in responding to market conditions, competition and changes in our cost structure or with which we may be unable to comply. Our business is subject to extensive government regulation, including any changes that may occur during the period of our authorization to provide telecommunication services. ANATEL, which is the main telecommunications industry regulator in Brazil, regulates, among others: (i) industry policies and regulations; (ii) licensing; (iii) rates and tariffs for telecommunications services; (iv) competition; (v) telecommunications resource allocation; (vi) service standards; (vii) technical standards; (viii) quality standards; (ix) consumer rights; (x) interconnection and settlement arrangements; (xi) coverage obligations; and (xii) spectrum. In addition to the rules set forth by ANATEL, we are subject to compliance with various legal and regulatory obligations, including, but not limited to, obligations arising from the following: (i) PCS authorizations under which we operate our cellular telecommunications business; (ii) fixed authorizations (local, national long distance, international long distance and multimedia service) under which we operate our telecommunications business; (iii) limited private services authorization under which we operate a private network formed by point-to-point radio communication (radio enlaces); (iv) the Consumer Defense Code; (v) the General Telecommunications Law (amended by Law No. 13,879/2019); (vi) the Data Protection Law (Law No. 13,709/2018, as amended); and (vii) the Brazilian Competition Law (Law No. 12,529/2011). We are also subject to applicable national and international anti-corruption laws. We believe that we are currently in material compliance with our obligations arising out of each of the above-mentioned laws, regulations and authorizations. Brazil is a highly competitive mobile market, having three companies operating networks with national coverage, plus other regional players and MVNOs.” Any potential deals involving such participants is likely to be carefully analyzed by CADE and ANATEL, on a state-by-state basis. Through the 5G spectrum auction, ANATEL auctioned licenses. In addition to bidders in the auction being required to offer a certain price, the condition of the auction requires the successor licensee to commit to certain minimum investments. There may be risks associated with being able to fulfill such commitments or for failing to comply with an investment commitment. Over the last few years, ANATEL has instituted certain administrative proceedings against us and other Brazilian telecommunications providers to investigate certain alleged nonconformities related to quality goals and other regulatory obligations. In response to the initiation of such ANATEL proceedings, we, as well as other active telecommunications companies in the Brazilian market, opted to negotiate and enter into a Term of Conduct Adjustment (“TAC”). The TAC aimed to remediate the underlying causes of the ongoing administrative proceedings by setting commitments to adjust conduct and an agreement with respect to general investments on future projects. The TAC was approved by ANATEL on August 22, 2019, and on June 19, 2020, our Board of Directors approved the execution of the TAC. On October 18, 2022, the first amendment was signed following renegotiation of chapter X, section I, which included the adjustment of obligations related to certain quality indicators. See “Item 4. Information on the Company—B. Business Overview—Regulation of the Brazilian Telecommunications Industry—PCS Regulation.” On October 20, 2023, Brazil’s Securities and Exchange Commission (CVM) published Resolution No. 193, which provides for the preparation and disclosure of financial information reports related to sustainability, based on the international standard issued by the International Sustainability Standards Board (ISSB). The CVM points out in the document that the decision considered the recommendations of the International Organization of Securities Commissions (IOSCO), based on the conclusion that these standards provide an effective and proportionate global framework of information aimed at investors, serving to help global financial markets assess the risks and opportunities related to sustainability. The resolution establishes, on a voluntary basis, the option for publicly traded companies, investment funds and securitization companies to prepare and disclose financial information related to sustainability, based on the international standard issued by the ISSB, as of the fiscal years beginning on or after January 1, 2024. In addition, it establishes for publicly traded companies the obligation to prepare and disclose financial information related to sustainability, based on ISSB standards, as of fiscal years beginning on or after January 1, 2026. With this resolution, Brazil became one of the pioneering countries in adopting the ISSB standards. Compliance with such regulations may cause changes in our cost structure and/or we may be unable to comply with such resolutions, each of which may adversely affect us. We cannot assure that we will be able to fully comply with each of the applicable laws, regulations and authorizations or that we will be able to comply with future changes in the laws and regulations to which we are subject. Moreover, compliance with this extensive regulation, the conditions imposed by our authorization to provide telecommunication services and other governmental action may limit our flexibility in responding to market conditions, competition and changes in our cost structure. These regulatory developments or our failure to comply with them could have a material adverse effect on our business, financial condition and results of operations. The Brazilian government under certain circumstances may terminate our authorizations or we may not receive renewals of our authorizations. We operate our business under authorizations granted by the Brazilian government. As a result, we are obligated to maintain minimum quality and service standards, including targets for call completion rates, geographic coverage and voice accessibility, data accessibility, voice drop, data drop, data throughput, user complaint rates and completion rates to our call center. Our ability to satisfy these standards, as well as others, may be affected by factors beyond our control. We cannot assure that, going forward, we will be able to comply with all of the requirements imposed on us by ANATEL or the Brazilian government. Our failure to comply with these requirements may result in the imposition of fines or other government actions, including restrictions on our sales and, in an extreme situation, the termination of our authorizations in the event of material non-compliance. Any partial or total revocation of our authorizations or failure to receive renewal of such authorizations when they expire would have a material adverse effect on our financial condition and results of operations. These regulations may have an adverse effect on our financial results given the dynamics of our revenues and costs related to interconnection fees. In addition, ANATEL may allow more favorable prices to operators without significant market power. Actual or perceived health risks or other problems relating to mobile telecommunications technology could lead to litigation or decreased mobile communications usage, which could harm us and the mobile industry as a whole. The effects of, and any damage caused by, exposure to electromagnetic fields has been and still is the subject of careful evaluation by the international scientific community, but until now there is no scientific evidence of harmful effects on health. We cannot rule out that exposure to electromagnetic fields or other emissions originating from wireless handsets will not be identified as a health risk in the future. These concerns could have an adverse effect on the wireless communications industry and, possibly, expose wireless providers, including us, to litigation. In addition, although Brazilian law already imposes strict limits in relation to transmission equipment, these concerns may cause regulators to impose greater restrictions on the construction of base station towers or other infrastructure, which may hinder the completion of network buildouts and the commercial availability of new services and may require additional investments. The expansion of our network may be affected by these perceived risks if we experience problems in finding new sites, which in turn may delay the expansion and may affect the quality of our services. ANATEL Resolution No. 700/2018 sets limits of emission and exposure for fields with frequencies between 8.3 kHz and 300 GHz, and ANATEL Act No. 17,865/2023 and Law No. 11,934/2009 establish limits related to the magnetic and electromagnetic emissions recommended by the World Health Organization and require that operators have to maintain a record of the measurements of the levels of the magnetic and electromagnetic emissions of each transmitting station. In 2021, Law No. 14,173/2021 came into force, which amended Law No. 11,934/2009, revoking the mandatory sharing of towers with less than 500 meters between them. The withdrawal of this obligation was considered essential for the implementation of 5G in Brazil, allowing for the expected increase in density for the new technology. Further, in 2022 Law No. 14,424/2022 came into force, which allowed operators to be authorized to install antennas, even if the competent authority does not respond within a period of 60 days. In 2024, the Brazilian Supreme Court reinstated the effects of the regulation requiring telecommunications companies to share transmission towers in the context of the Direct Action of Unconstitutionality (ADI) 7708, which is still ongoing. Any of these or any other additional regulations could adversely affect our business, financial condition and results of operations. Government authorities could review the regulation of wireless handsets and base stations as a result of these health concerns, or wireless companies, including us, could be held liable for costs or damages associated with these concerns, which could have an adverse effect on our business, financial condition and results of operation. We cannot assure you that further medical research and studies will refute a link between the mobile technology in question and these health concerns. Risks Relating to Brazil Risks related to Brazilian economic and political conditions may negatively affect our business. Political conditions in Brazil may affect the confidence of investors and the public in general, as well as the development of the economy. Political crises have affected and continue to affect the confidence of investors and the public in general, historically resulting in economic deceleration and heightened volatility in the prices of securities offered by companies with significant operations in Brazil. The recent economic instability in Brazil has contributed to a decline in confidence in the Brazilian market, as well as to a deteriorating political environment. For example, the presidential elections occurred in October 2022, with Luiz Inácio Lula da Silva defeating Jair Messias Bolsonaro, in one of the closest presidential races in history. President Lula’s return has deepened political polarization. Following Lula’s re-election, large-scale protests erupted, culminating in the January 8, 2023 attacks on Brazil’s Congress, Supreme Court, and Presidential Palace. The Supreme Electoral Court, led by Justice Alexandre de Moraes, subsequently barred former President Jair Bolsonaro from public office until 2030 for abuse of political power during the 2022 election. In February 2025, Brazil’s Prosecutor-General’s Office filed charges against Bolsonaro at the Supreme Court. In September 2025, the Supreme Court found Bolsonaro guilty of five criminal counts, including participation in an armed criminal organization, attempted violent abolition of the democratic rule of law, attempted coup, qualified damage and deterioration of protected heritage property, and sentenced him to 27 years and three months in prison. On November 22, 2025, Bolsonaro was arrested by the Brazilian federal police alleging attempted tampering of his electronic ankle monitor deeming him a flight risk. Meanwhile, the Brazilian judiciary’s growing role in political matters has drawn international attention—most notably when former U.S. President Donald Trump accused Brazil’s courts of unfairly targeting Bolsonaro and criticized Justice de Moraes, after which U.S. sanctions were imposed on Justice de Moraes under the Global Magnitsky Act. These events, alongside institutional clashes such as the temporary ban of social media platform X in 2024, have raised concerns over regulatory predictability, diminished foreign investor appetite, and heightened uncertainty ahead of the Brazilian presidential election to be held in 2026. The outcomes of these proceedings and related political developments remain unpredictable and could adversely affect Brazil’s economy, our business, and the market for our securities. Uncertainty surrounding Brazil’s 2026 presidential election may enhance political and economic volatility. The electoral environment is expected to remain highly polarized, with limited visibility on the final candidate field, coalition alignments and the policy direction of the next administration. Judicial proceedings involving prominent political figures, restrictions on political eligibility and the judiciary’s active role in electoral oversight may further heighten uncertainty around the electoral process. Election-related uncertainty may delay or disrupt fiscal consolidation efforts, regulatory reforms and privatization initiatives and may increase market volatility, currency fluctuations, risk premiums and reduce foreign investment flows. Any contested election outcome or post-election unrest could further exacerbate political tensions and negatively affect economic activity, Brazil’s economy, our business and the market price for our securities. Moreover, Brazil is undergoing a comprehensive tax reform process that is intended to simplify the tax system and improve efficiency, but it will also entail significant changes in tax bases, rates, credit mechanisms and collection models (including the adoption of “split payment”), which may affect relative prices, profitability across sectors and regions, and the allocation of investments. For us, the implementation of IBS and CBS may require substantial adaptations in our billing and enterprise systems, processes and contracts, including the review of supply chain structures, pricing strategies and tax credit management, and may result in transitional costs and uncertainty regarding the net tax burden on our services. See “Item 3 Key Information – D. Risk Factors – Risks Relating to Brazil Changes in Brazilian tax laws may have an adverse impact on the taxes applicable to our business and over our prices.” The approval of relevant economic initiatives by the National Congress of Brazil demonstrates that the Brazilian Federal Government, despite lacking a stable parliamentary majority, has been able to build cross-party consensus on a case-by-case basis to advance key elements of its economic agenda, including tax reform regulation and fiscal measures. However, this legislative dynamic requires ongoing negotiations and coalition-building, and political developments, shifts in legislative or executive priorities, or disagreements over fiscal rules, public spending, regulation or industrial policy may affect policy continuity, market confidence and investment conditions. In addition, changes in the composition of economic authorities, including leadership at the Central Bank of Brazil, could influence monetary policy expectations, perceptions of institutional independence and macroeconomic variables such as inflation, interest rates and exchange-rate volatility. Ultimately, we cannot predict the scope, nature and impact of any policy changes or reforms (or reversals thereof) that may be implemented by Brazil’s presidential administration, particularly the scope, viability, and effectiveness of much-anticipated tax reforms, which could result in further political and economic instability and negatively impact the regulatory framework in which we operate, which in turn could adversely affect our businesses, financial condition and operating results. Likewise, we cannot predict how the actions of Brazil’s presidential administration may impact the overall stability, growth prospects and economic and political health of the country. Global conditions may also affect Brazil’s economic and financial stability. For example, on July 30, 2025, U.S. President Donald Trump signed an Executive Order imposing an additional 40% tariff on imports from Brazil, raising the total tariff rate to 50%, effective August 6, 2025. While certain product categories (such as orange juice, civil aircraft, petroleum, vehicles and parts, fertilizers and energy products) were excluded, many Brazilian exports to the U.S. became subject to one of the highest tariff rates globally. The U.S. administration also revoked the visas of multiple members of Brazil’s Supreme Federal Court and the Attorney General, citing concerns over alleged human rights violations and restrictions on free speech. On August 13, 2025, the Brazilian government announced an emergency package of countermeasures totaling approximately R$30.0 billion, including subsidized credit lines for exporters, expansion of tax rebate and suspension programs, reforms to export guarantee mechanisms, direct federal procurement of affected goods and the filing of complaint with the World Trade Organization. In November 2025, following negotiations between the two governments, the United States revoked the additional tariffs on certain Brazilian agricultural goods and reinstated prior tariff levels. On February 20, 2026, the U.S. Supreme Court determined that several tariffs implemented by the Trump administration were unconstitutional. In response to this decision, President Trump announced the immediate implementation of a 15% across-the-board tariff under section 122 of the Tariff Act. These tariffs are set to expire after 150 days unless extended by Congress. Uncertainties remain regarding the overall trajectory of the trade policy between U.S. and Brazil, the potential for future trade actions, and the impact of broader geopolitical considerations on bilateral relations. As a result, volatility in trade-dependent industries and cross-border capital flows may continue, and renewed measures could be reinstated with limited notice. Any escalation of the dispute could lead to further tariffs, trade restrictions, or other non-tariff barriers, adversely affecting the Brazilian economy, the value of the Brazilian real, investor confidence, and cross-border capital flows. Additionally, the diplomatic tensions between the two countries could impair bilateral cooperation in other areas, which could indirectly affect our operations. The Brazilian government has exerted significant influence over the Brazilian economy and continues to do so. This involvement may have an adverse effect on our activities, our business and on the market prices of our shares and ADSs. In the recent past the Brazilian government has frequently intervened in the Brazilian economy and occasionally made drastic changes in economic policy. To influence the course of Brazil’s economy, control inflation and implement other policies, the Brazilian government has taken various measures, including the use of wage and price controls, currency devaluations, capital controls and limits on imports and freezing bank accounts. We have no control over and cannot predict what measures or policies the Brazilian government may take or adopt in the future. Our business, financial condition, revenues, results of operations, prospects and the trading price of our securities may be adversely affected by changes in government policies and regulations, as well as other factors, such as: (i) fluctuating exchange rates; (ii) inflation; (iii) interest rates; (iv) fiscal and monetary policies; (v) changes in tax regimes; (vi) liquidity in domestic capital and credit markets; (vii) economic, political and social instability; (viii) reductions in salaries or income levels; (ix) rising unemployment rates; (x) tax policies (including those currently under consideration by the Brazilian Congress); (xi) exchange controls and restrictions on remittances abroad; and (xii) other political, diplomatic, social or economic developments in or affecting Brazil. Uncertainty regarding changes by the Brazilian government to the policies or standards that affect these or other factors could contribute to economic uncertainty in Brazil and increase the volatility of the Brazilian capital market and of securities issued abroad by Brazilian companies. Additionally, interruptions in the credit and other financial markets, and the deterioration of the Brazilian and/or global economic environment may, among other effects: (1) have a negative impact on demand, which may reduce sales, operating income and cash flow; (2) decrease consumption of our products; (3) restrict the availability of financing for our operations or investments, or for the refinancing of our debt in the future; (4) cause creditors to modify their credit risk policies and restrict our ability to negotiate any of the terms of our debt in the future; (5) cause the financial situation of our clients or suppliers to deteriorate; or (6) decrease the value of our investments. Changes in Brazilian tax laws may have an adverse impact on the taxes applicable to our business and over our prices. Our business is substantially affected by the tax regime in Brazil on telecommunications goods and services, as disclosed in detail in “Item 4. Information on the Company—B. Business Overview—Taxes on Telecommunications Goods and Services.” In recent years, there have been several changes to Brazilian tax laws and their interpretation, which has created uncertainty for our business in how it calculates and complies with the relevant tax burdens. Further changes in tax regulations, such as a possible tax reform previously announced by the Brazilian Federal Government, could impact our financial assets and liabilities as well as our pricing, which could have a material adverse effect on our business, financial condition and results of operations. In 2025, the Brazilian Federal Government experienced a primary deficit of approximately R$55 billion, equivalent to 0.43% of the gross domestic product (“GDP”). Despite the shortfall, the fiscal target for the year was formally met. Nevertheless, the Brazilian Federal Government’s expenses surpassed its total revenues. Similarly to the target set for 2025, the budget for 2026 has set a zero target for primary deficit, signaling an effort to increase tax revenue or reduce expenditure. Financial market consensus indicates the Federal Government preference for increasing taxes, recent developments might corroborate with this view. Some recent tax changes may potentially have adverse impacts on the taxes applicable to our business and our prices. In order to limit the ability for state governments to undertake aggressive taxation, the Brazilian Federal Constitution prescribes that the state sale tax (“ICMS”) can be variable, according to the essentiality of the goods and services. As such, the most essential goods and services should generally have lower rates than luxurious goods and services. Accordingly, in December 2021, the Brazilian Supreme Court also ruled that telecommunications services must be taxed at the general ICMS rate provided for in each state’s law. In the leading case, taxpayers required recognition of the unconstitutionality of the rate of 25% levied on the supply of communication services in the State of Santa Catarina where the general rate is 17%. The Brazilian Supreme Court decided that communication services should be taxed at the general rate and softened the effects of this decision on the state by providing that it becomes effective only in 2024. Despite this decision, the Federal Congress enacted, on June 2022, Complementary Law No. 194/2022, which provides that communications and other activities, such as fuels, natural gas, electricity and public transportation, are essential goods and services, and, consequently, limited the ICMS levied on such transactions to the minimum tax rate of each State, which varied at the time from 17% to 18%. Therefore, the imposition of ICMS rates higher than the general rates of each State for the goods and services was prohibited by law from June 2022 onwards. Due to this reduction, states had a significant tax collection decrease by the end of 2022, approximately at R$33.5 billion. In order to address and prevent the expected loss, a study by COMSEFAZ, a council of state finance secretaries, recommended state governments raise their general ICMS rate by 4% from 2023 onwards. As a result, since June 2022 the ICMS average rate has raised from approximately 18.5% to approximately 19.5%. Also in 2022, Complementary Law No. 190/2022 was enacted to regulate the ICMS levied on interstate operations with final consumers or non-ICMS taxpayers. On interstate sales to final consumers, the ICMS should be split between the state of origin and state of destination, as follows: (a) to the state of origin, the ICMS is calculated with the interstate rate (4%, 7% or 12%); and (b) to the state of destination, the ICMS is calculated based on the difference between the interstate rates used in the transaction and the rate applicable to internal transactions in the state of destination (usually from 17% to 21%), also known as ICMS DIFAL. According to this law, the ICMS DIFAL should be determined based on a double basis calculation. For us, it should mostly impact our fixed assets acquisitions and, although it should represent an increase in the cash out, the additional tax should be mainly recovered as a credit input on a monthly basis throughout the following four years. In relation to other taxes, there were some relevant changes regarding the federal excise tax (“IPI”). In February 2022, the Brazilian government issued a decree reducing the tax by 25% on average for several products sold in Brazil. In April, a new decree was enacted, increasing the IPI reduction to 35%, except for products produced in the Manaus Duty-Free Zone (“ZFM”). In 2023, these measures were kept. The other relevant change in 2022 refers to the social integration program (“PIS”) and the social security financing contribution (“COFINS”). In December of 2022, the Brazilian Federal Revenue Office published the Normative Instruction No. 2,121/2022 (“IN No. 2,121/2022”), regulating the PIS and COFINS social contributions. In essence, IN No. 2,121/2022 – which replaced IN No. 1,911/19 – consolidated the new guidelines on ascertainment, inspection, collection and administration of the contributions for: (i) PIS/PASEP; (ii) COFINS; (iii) PIS/PASEP-Import; and (iv) COFINS-Import. Furthermore, on December 30, 2022, Decree No. 11,322/22 reduced by half the PIS/COFINS rates levied on financial income earned by companies subject to the non-cumulative regime. The rates changed from 0.65% and 4% to 0.33% and 2%, respectively. According to the Decree, the reduction would take effect from January 1, 2023. However, on January 2, it was revoked by the newly inaugurated Government, reestablishing the PIS and COFINS rates levied on financial income to its original values. From a federal tax perspective, at the end of 2022, there were new relevant tax legislation enacted, including Provisional Measure No. 1,152 (“MP No. 1,152/2022”), which changed the legislation on corporate income tax (“IRPJ”) and social contribution on net profit (“CSLL”), providing for new transfer pricing rules. MP No. 1,152/2022 aims to align the Brazil’s rules with international standards and results from a process aimed at adapting Brazilian standards to those recommended by the Organization for Economic Cooperation and Development (OECD). To this end, there was an amendment to the arm’s length principle and changes to transfer pricing rules which used to be exclusive to Brazil. This Provisional Measure was converted into Law No. 14,596, dated as of June 14, 2023. This new law expressly incorporated the arm’s length principle into the Brazilian legal system. In addition, the new regulation reformulates the current system, abandoning the fixed-margin Benchmark calculation in favor of comparability tests, which better approximate to the “arm’s length” principle incorporated into the Brazilian legal system with the new law mentioned above. This principle establishes that the Benchmark calculation should consider the relationships between independent parties in comparable transactions. This new regime must be complied mandatorily starting on 2024, or voluntarily starting on 2023, for taxpayers who wish to anticipate the effects of the new law. The regulation of the law will be issued by the Special Secretariat of the Federal Revenue of Brazil in the form of a Normative Instruction that will be updated periodically to reflect the needs for additional practical guidance and clarification considerations. The first normative instruction was published on September 29, 2023, the Normative Instruction No. 2,161/23. On December 20, 2023, the Brazilian Congress approved the consumption tax reform, resulting in the enactment of Constitutional Amendment No. 132/2023 which completely overhauls the taxation over consumption. One of the main goals of this tax reform is to simplify the tax legislation applicable to the consumption in Brazil by replacing current indirect taxes (i.e., ICMS, ISS, PIS and COFINS) by a dual value-added tax (“dual-VAT”), composed by a federal contribution on goods and services (“CBS”) and a sub-national goods and services tax (“IBS”). It also creates a new excise tax (“IS”) to be applied over goods and services considered harmful to health or the environment, such as alcoholic beverages and cigarettes. The IS tax will partially replace the IPI. The CBS will replace the current federal social contributions (PIS and COFINS) whereas the IBS will replace both ICMS and the municipal tax on services (“ISS”). In short, the dual-VAT will have a broad-based and full non-cumulative tax on goods and services, will be charged in the destination, and will have a few tax rates and exceptions. Until 2027, all the previous taxes and CBS will be imposed at the same time. In 2027, PIS/COFINS will cease to exist and will be replaced definitively by CBS, which will have its standard rate. IPI will be set at zero for the vast majority of domestic and imported products in 2027. The IS will also come into effect in 2027. From 2029 to 2032, the IBS rates will be increased proportionally year by year, while the ICMS and ISS rates will be gradually reduced, as well as the tax benefits granted during this period. In 2033, the IBS will be fully implemented, while the ICMS and ISS will be abolished. Further IBS, CBS and IS regulations were enacted on January 16, 2025 through Supplementary Law No. 214. However, tax rates have not yet been defined. Accordingly, we cannot anticipate the impact of the consumption tax reform on our operations with any precision as of the date of this annual report on Form 20-F. However, the effects on our results of operations may be significant and could have negative consequences that materially affect our reported results. As a result, 2026 is expected to function as a transition year, and beginning in 2027 we will be required to operate fully under the new tax model, which may entail (i) increased operational complexity resulting from the coexistence of different tax regimes, (ii) the risk of increases in, and/or greater volatility of, our indirect tax burden and potential pass-through effects on pricing during the migration to the IBS, CBS and IS regimes, (iii) execution risk during the 2026–2027 transition period, and (iv) cash flow risks arising from the design of tax credits, including CAPEX-intensive credits, reimbursement or offset timelines, and the operational mechanisms of the new model, such as split payment arrangements contemplated under Complementary Law No. 214/2025. The other relevant change from a federal tax law perspective was that the executive branch completely modified the current system of exemption from subsidies for investment in the country with the revocation of article 30, of Law No. 12,973/14, as well as the provisions of Law No. 10,637/02 and Law No. 10,833/03, on August 30, 2023, through Provisional Measure No. 1,185. As a result, such subsidy revenues are normally taxed by IRPJ, CSLL, COFINS and PIS. On the other hand, the new legal system allows the appropriation of tax credits to be used to offset the taxpayer’s own debts to the Brazilian federal revenue service (“RFB”) or reimbursed in cash. The application of this mechanism depends on prior authorization from the Federal Revenue, which will be granted after investments have been made in the enterprise that is intended to qualify to receive the tax incentive. The project to convert the Provisional Measure No. 1,185 into law was approved by the Brazilian Congress on December 15, 2023, Law No. 14,789 which inaugurates a new tax treatment system for subsidies at the federal level. It is important to highlight that the bill that was approved innovated in relation to the bill originally proposed by changing the legal treatment rendered to taxation of interest on equity (“IoE”). The bill made the institute more restrictive by providing, for example, that positive variations in net equity resulting from corporate acts between dependent parties, which do not involve the effective inflow of assets to the legal entity, will not be considered, as disclosed in detail in “Item 10. Additional Information––E. Taxation––Brazilian Tax Considerations-Distributions of Interest on Capital.” These changes may represent a potential reduction in deductibility limit, for the CIT base. On December 28, 2023, the Provisional Measure No. 1,202 was issued and among other provisions, aims to establish a new legal framework limiting the offsetting of credits resulting from a final court decision with a value equal to or exceeding R$10 million. The bill to convert the Provisional Measure No. 1,202 into law was approved by the National Congress on December 27, 2023. This approval resulted in Law No. 14,784, which preserved the original content of the Provisional Measure No. 1,202. This measure aims to boost tax collection by restricting the use of credits from final court decisions for offsetting taxes. In alignment with the OECD/G20 international tax framework, Brazil enacted Law No. 15,079 on December 27, 2024, introducing the Pillar Two global minimum tax rules. This legislation is intended to address base erosion and profit shifting (BEPS) by ensuring that the profits of large multinational enterprise (“MNE”) groups are subject to a minimum effective tax rate of 15%, regardless of where such profits are generated. The law became effective on January 1, 2025 and applies to MNE groups with consolidated annual revenues of at least EUR750 million in at least two of the preceding four fiscal years. It requires the calculation of the Global Anti-Base Erosion (GloBE) effective tax rate on a jurisdiction-by-jurisdiction basis, with a top-up tax becoming payable to the extent the effective tax rate in any jurisdiction falls below 15%. To implement this framework, Brazil introduced a Qualified Domestic Minimum Top-up Tax (QDMTT), structured as a surtax on the CSLL). This mechanism is intended to ensure that any top-up tax attributable to profits generated by Brazilian entities is collected domestically. In addition, Complementary Law No. 224, enacted on December 26, 2025, established a systematic and linear reduction of federal tax incentives and benefits, effective as of January 1, 2026. This reduction applies cumulatively across federal taxes, including PIS and COFINS, IRPJ, CSLL, import duty (“II”), IPI and employer social security contributions. The reduction is implemented through a standardized methodology that adjusts each benefit based on its specific legal nature. Under this framework, tax incentives and benefits are generally adjusted as follows: (i) exemptions and zero-rate benefits are subject to a rate corresponding to 10% of the standard tax rate; (ii) reduced-rate benefits are adjusted to the sum of 90% of the reduced rate and 10% of the standard rate; (iii) tax base reductions are limited to 90% of the reduction provided under the applicable legislation; (iv) financial or tax credits, including deemed or notional credits, are limited to 90% of the original credit amount, with the remaining portion cancelled; (v) reductions of tax due are limited to 90% of the amount otherwise applicable; (vi) optional special or preferential regimes based on gross revenue are subject to a 10% increase in the applicable gross revenue rate; and (vii) presumed tax base regimes are subject to a 10% increase in presumption percentages. The legislation provides an exhaustive list of tax benefits excluded from this reduction framework, including constitutional tax immunities, zero-rate benefits applicable to products included in the National Basic Food Basket and benefits available to micro and small enterprises under the Simples Nacional regime. In addition, the law establishes an aggregate cap on the granting, expansion or renewal of tax incentives and benefits equal to 2% of Brazil’s GDP and generally limits their duration to a maximum of five years. This new framework could increase the overall tax burden and create uncertainty for taxpayers, including us, which could adversely affect our business, financial condition and results of operations. Inflation, and government measures to curb inflation, may adversely affect the Brazilian economy and capital market, our business and operations and the market prices of our common shares or the ADSs. In the recent past, Brazil has experienced high rates of inflation and the government’s measures taken to curb inflation have had significant negative effects on the Brazilian economy. The actions taken in order to absorb the COVID-19 pandemic effects increased market volatility, enhanced existing risks and, despite the resulting contraction of economic activity, the Brazilian economy continued to suffer from inflationary pressures during 2024. The current ongoing concern regarding the government’s capacity to implement the public budget, particularly with respect to expenses control and revenue increase, affects the inflation expectation, which, in turn, results in the increase of interest rates. The upper threshold of the inflation target was exceeded in 2024 and the monetary tightening cycle applied (raising of basic interest rates) seeks to ensure that the scenario does not repeat itself in 2025. Therefore, adjustments in monetary policy are expected soon, based on a concrete and positive fiscal effort. Any uncertainty regarding future government fiscal measures which may be taken to reduce inflation, could affect the confidence of investors, and the market in general, and, consequently, affect our operating and financial results, and increase volatility in the Brazilian capital markets. Exchange rate movements and interest rate fluctuation may have an adverse effect on our business and the market prices of our shares or the ADSs. Appreciation of the real against the U.S. dollar may lead to a deterioration of the country’s current account and the balance of payments, as well as to a dampening of export-driven growth. Any such appreciation could reduce the competitiveness of Brazilian exports and adversely affect net sales and cash flows from exports. Devaluation of the real relative to the U.S. dollar could create additional inflationary pressures in Brazil by increasing the price of imported products, which may result in the adoption of deflationary government policies. The sharp depreciation of the real in relation to the U.S. dollar may generate inflation and governmental measures to fight possible inflationary outbreaks, including the increase in interest rates, which reduces the purchasing power of consumers and raises the cost in the credit market. Devaluations of the real would reduce the U.S. dollar value of distributions and dividends on our common shares and ADSs and may also reduce the market value of such securities. Any such macroeconomic effects could adversely affect our net operating revenues and our overall financial performance. We acquire equipment and handsets from global suppliers, the prices of which are denominated in U.S. dollars. Depreciation of the real against the U.S. dollar may result in a relative increase in the price of our equipment and handsets. Thus, we are exposed to foreign exchange risk arising from our need to make substantial dollar-denominated expenditures, particularly for imported components, equipment, and handsets, that we have limited capacity to hedge. See “Item 5. Operating and Financial Review and Prospects.” As of December 31, 2025, we had no exposure to debt denominated in foreign currencies. All of our outstanding indebtedness was indexed to inflation (i.e. the National Consumer Price Index or Índice Nacional de Preços ao Consumidor Amplo (“IPCA”)) and fully hedged through interest rate swaps linked to Brazilian floating interest rates. See “Item 11. Quantitative and Qualitative Disclosures About Market Risk.” The effects of the weak domestic economy could reduce purchases of our products and services and adversely affect our results of operations, cash flows and financial condition. The Brazilian economy has recently shown a combination of moderate GDP growth and resilient services activity, alongside episodes of rising inflation, tighter monetary policy and exchange-rate volatility. Although domestic demand has recovered from the pandemic period, inflationary pressures and uncertainty regarding fiscal consolidation have contributed to higher policy interest rates and a more cautious stance by the Central Bank of Brazil. Macroeconomic conditions directly affect our business since certain of our assets and liabilities are indexed to inflation and the demand for telecommunications services depends on customers’ real income and access to credit. Inflation increased during 2024 and remained above the official target for part of 2025, prompting the Central Bank to raise interest rates and keep monetary policy restrictive, even as unemployment declined and economic activity expanded. Higher inflation erodes households’ purchasing power, particularly among lower income segments, while higher interest rates raise debt service burdens and tighten credit conditions, leading consumers and businesses to reduce or postpone discretionary spending. Under these conditions, customers may downgrade to lower priced plans, reduce usage of value added services or delay device upgrades, and delinquency and churn may increase, which could adversely affect our revenues, margins and cash flows. While labor market indicators and government support programs have helped sustain consumption, surveys show that Brazilian consumers remain concerned about inflation, interest rates and indebtedness, which affects confidence and spending intentions. A deterioration in labor market conditions, slower wage growth, reduced government transfers or a tightening of consumer and corporate credit could further weigh on demand for telecommunications services, especially among more price-sensitive customer segments. In addition, a weaker Brazilian real and persistent inflation can increase our operating and capital expenditures, including network equipment, energy, leases and imported handsets and devices, and there is no assurance that we will be able to fully pass such cost increases on to customers without negatively affecting demand and our competitive position. Adverse macroeconomic developments—such as lower-than-expected economic growth, higher or more volatile inflation, additional interest-rate hikes, deterioration in credit conditions or negative shocks to employment and income—could therefore lead to a loss of customers, a reduction in spending by existing customers, higher bad-debt expenses and delays in planned infrastructure investments. Any of these factors could have a material adverse effect on our business, financial condition, results of operations and cash flows and could make it more difficult for us to achieve our growth targets. We may be impacted by volatility in the global financial markets. Our business and the market price and liquidity of our securities are influenced by global financial and economic conditions, including interest-rate cycles, risk appetite toward emerging markets, capital flows and geopolitical developments. In recent years, global financial markets have experienced periods of heightened volatility driven by rapid monetary tightening in advanced economies, concerns about sovereign debt sustainability, banking-sector stress episodes, and escalating geopolitical tensions, including ongoing conflicts in Europe and the Middle East. Although global growth is projected to continue, it is expected to remain modest and uneven, and the International Monetary Fund and other institutions highlight that risks to the outlook remain tilted to the downside, including renewed trade tensions, abrupt changes in financial conditions and geopolitical shocks. Any potential sanitary and health crisis, and the short-, medium- and long-term consequences of the financial, monetary and other policies implemented in response to it, may be a source of uncertainty for global economic activity. During the peak of the COVID-19 pandemic, governments and central banks around the world undertook unprecedented measures to try to contain the spread of the disease whilst seeking to protect local economies and consumer confidence. The effects of financial and monetary policy put into effect during the pandemic are effecting on the global economy, as an example, post-pandemic fiscal crises have put pressure on leading economies and governments around the world, including in Brazil, face the challenge of balancing their accounts amid political and economic tensions. Tighter global financial conditions and changes in investor sentiment toward riskier assets can have a direct impact on emerging markets such as Brazil. Episodes of risk aversion have led to capital outflows from Brazilian financial markets, exchange-rate depreciation and higher sovereign and corporate spreads, while periods of improved sentiment have facilitated renewed inflows. Sharp movements in global interest rates, shifts in expectations regarding monetary policy in the United States and other major economies, or increased uncertainty related to trade policy and geopolitical events may reduce foreign investors’ appetite for Brazilian assets, including securities issued by Brazilian telecommunications companies. These developments could negatively affect the market price and liquidity of our securities and our ability to access international capital markets on acceptable terms or at all. Geopolitical risks—including the ongoing war between Russia and Ukraine, in the Middle East, particularly, more recently, the military conflict involving Iran, the U.S. and Israel, and in Venezuela following the January 2026 ouster of Nicolas Maduro, and the broader reconfiguration of global trade and investment flows—continue to pose threats to financial stability and investor confidence. Such events can trigger volatility in commodity prices, exchange rates and global equity and credit markets, as well as disruptions in supply chains and energy markets, which in turn may affect inflation, interest rates and global growth. In addition, trade disputes, sanctions regimes and changes in cross-border investment policies can alter the availability and cost of funding for companies operating in emerging markets, including Brazil. For the telecommunications sector, prolonged periods of global market volatility and tighter financial conditions may have several adverse consequences. Higher global and domestic interest rates and wider credit spreads can increase our cost of borrowing, affect the valuation of our debt portfolio and derivatives, and reduce the attractiveness of refinancing or extending maturities. Deterioration in global or regional financial conditions may also lead lenders and investors to reduce exposure to emerging markets or to sectors they perceive as riskier, thereby restricting our access to loans, capital markets and other financing sources needed to fund network investments, spectrum payments and strategic projects. Furthermore, a sustained deterioration in global conditions that spills over into Brazil could affect economic growth, consumer confidence and currency stability, which may reduce demand for our services and increase our operating and capital costs. Any of these factors—global financial market volatility, tighter international funding conditions, deteriorating investor sentiment toward emerging markets, or adverse geopolitical and macroeconomic developments—could negatively impact our funding costs, access to capital, investment plans and the market price and liquidity of our securities, and could have a material adverse effect on our business, financial condition and results of operations. Developments and the perception of risk in other countries may adversely affect the Brazilian economy and market price of Brazilian issuers’ securities. The market value of securities of Brazilian issuers is influenced not only by domestic conditions, but also by economic, financial and political developments in other countries, particularly the United States and European economies, as well as other Latin American and emerging markets. Even when economic conditions in those countries differ from those in Brazil, shifts in global risk appetite and investors’ reactions to external events can lead to portfolio reallocations that affect Brazilian assets, including securities issued by Brazilian telecommunications companies. Crises or episodes of stress in other emerging markets may reduce investor interest in emerging market securities more broadly, which can negatively impact on the price and liquidity of our securities, restrict our access to international capital markets and affect our ability to finance our operations on favorable terms or at all. Adjustments in monetary policy in advanced economies, particularly in the United States, have historically generated spillovers to emerging markets through interest rates, exchange rates and capital flows. Periods of faster than expected tightening or changes in expectations regarding the path of U.S. interest rates have been associated with higher global yields, increased volatility and capital outflows from emerging markets, including Brazil, leading to local currency depreciation and wider sovereign and corporate spreads. Brazil is generally considered among the more sensitive emerging markets to U.S. monetary policy shocks, reflecting its financial integration and macroeconomic characteristics. In addition, fiscal and regulatory policy shifts in the United States and other major economies, as well as changes in trade and industrial policies, may alter global capital flows and risk premia for emerging markets. The policy stance of the current U.S. administration, including potential changes in trade, industrial or financial regulation priorities during President Donald Trump’s term beginning in 2025, may increase uncertainty about global growth and financial conditions and, consequently, about the outlook for Brazil. Geopolitical tensions and conflicts also contribute to volatility and risk repricing in global financial markets. The ongoing conflicts between Russia and Ukraine, in the Middle East, particularly, more recently, the military conflict involving Iran, the U.S. and Israel, and in Venezuela following the January 2026 ouster of Nicolas Maduro have increased geopolitical risk, driven up certain commodity prices and contributed to episodes of heightened volatility across equity, bond, foreign exchange and energy markets. Studies published in scientific journals, such as the International Journal of Food and Agricultural Economics, show that the conflict has significantly increased volatility spillovers among major financial markets and energy commodities, reinforcing financial stability concerns and affecting investor sentiment. More broadly, the combination of war related sanctions, supply chain disruptions, higher energy prices and uncertainty about the duration and escalation of conflicts has added to inflationary pressures and tightened financial conditions globally. Any deterioration in global financial conditions or increase in global risk aversion—whether driven by U.S. monetary policy, geopolitical events, regional conflicts, financial sector stress in advanced economies, or crises in other emerging markets—could lead to capital outflows from Brazil, exchange rate depreciation, higher inflation and interest rates, and tighter funding conditions. These developments may reduce investors’ appetite for Brazilian securities, including our securities, increase our funding costs, limit our access to domestic and international capital markets and adversely affect the trading price and liquidity of our shares and other securities. As a result, adverse developments and changes in the perception of risk in other countries and regions could have a material adverse effect on the Brazilian economy and on our business, financial condition, results of operations and the market price and liquidity of our securities. Risks Relating to our Common Shares and the ADSs Our controlling shareholder has power over the direction of our business. Telecom Italia, through its ownership of TIM Brasil Serviços e Participações S.A. (“TIM Brasil”), our controlling shareholder, has the ability to determine actions that require shareholder approval, including the election of a majority of our directors and, subject to Brazilian law, the payment of dividends and other distributions. Telecom Italia’s main shareholder is Poste Italiani S.p.A., which is able to have significant influence over Telecom Italia. Telecom Italia may pursue acquisitions, asset sales, joint ventures or financing arrangements or may pursue other objectives that conflict with the interests of other shareholders and which could adversely affect our business, financial condition, and results of operations. Holders of our ADSs are not entitled to attend shareholders’ meetings and may only vote through the depositary. Under Brazilian law, only shareholders registered as such in our corporate books may attend shareholders’ meetings. All common shares underlying our ADSs are registered in the name of the depositary. A holder of ADSs, accordingly, is not entitled to attend shareholders’ meetings. Holders of our ADSs may exercise their limited voting rights with respect to our common shares represented by the ADSs only in accordance with the deposit agreement relating to the ADSs. There are practical limitations upon the ability of ADS holders to exercise their voting rights due to the additional steps involved in communicating with ADS holders. For example, we are required to publish a notice of our shareholders’ general meetings in certain newspapers in Brazil. Holders of our shares can exercise their right to vote at a shareholders’ general meeting by attending the meeting in person or voting by proxy. By contrast, holders of our ADSs will receive notice of a shareholders’ general meeting by mail from the ADR depositary following our notice to the ADR depositary requesting the ADR depositary to do so. To exercise their voting rights, ADS holders must instruct the ADR depositary on a timely basis. This voting process will take longer for ADS holders than for direct holders of our shares. We cannot assure you that holders will receive the voting materials in time to ensure that such holders can instruct the depositary to vote the shares underlying their respective ADSs. In addition, the depositary and its agents are not responsible for failing to carry out the holder’s voting instructions or for the manner of carrying out your voting instructions. This means that holders may not be able to exercise their right to vote and may have no recourse if our shares held by such holders are not voted as requested. Holders of our ADSs or common shares in the United States may not be entitled to participate in future preemptive rights offerings. Under Brazilian law, if we issue new shares for cash as part of a capital increase, we generally must grant our shareholders the right to purchase a sufficient number of shares to maintain their existing ownership percentage. Rights to purchase shares in these circumstances are known as preemptive rights. We may not legally allow holders of our ADSs or common shares in the United States to exercise any preemptive rights in any future capital increase unless we file a registration statement with the SEC with respect to that future issuance of shares or the offering qualifies for an exemption from the registration requirements of the Securities Act. At the time of any future capital increase, we will evaluate the costs and potential liabilities associated with filing a registration statement with the SEC and any other factors that we consider important to determine whether to file such a registration statement. We cannot assure holders of our ADSs or common shares in the United States that we will file a registration statement with the SEC to allow them to participate in a preemptive rights offering. As a result, the equity interest of those holders in us may be diluted proportionately. Cash dividends, interest on shareholders’ equity and other cash distributions, as well as judgments seeking to enforce our obligations in respect of our shares or ADSs in Brazil will be payable only in reais. We pay any cash dividends, interest on shareholders’ equity and any other cash distributions related to our common shares in Reais. Accordingly, exchange rate fluctuations affect the U.S. dollar amounts received by the holders of ADSs on conversion by the depositary of dividends and other distributions in Brazilian currency on our common shares represented by ADSs. In addition, exchange rate fluctuations may also affect our dollar equivalent results of operations. See “Item 5. Operating and Financial Review and Prospects.” If proceedings are brought in the courts of Brazil seeking to enforce our obligations with respect to our shares or ADSs, we will not be required to discharge our obligations in a currency other than Reais. Under Brazilian exchange control limitations, an obligation in Brazil to pay amounts denominated in a currency other than reais may only be satisfied in Brazilian currency at the exchange rate, as determined by the Central Bank, in effect on the date the judgment is obtained, and such amounts are then adjusted to reflect exchange rate variations through the effective payment date. The then prevailing exchange may not afford non-Brazilian investors with full compensation for any claim arising out of or related to our obligations under our shares or the ADSs. See “—A. Selected Financial Data—Exchange Rates” for information regarding exchange rates for the Brazilian real. Holders of ADSs or common shares could be subject to Brazilian income tax on capital gains from sales of ADSs or common shares. According to Article 26 of Law No. 10,833 of December 29, 2003, capital gains realized on the disposition of assets located in Brazil by non-Brazilian residents, whether or not to other non-residents and whether made outside or within Brazil, are subject to taxation in Brazil. Since January 1, 2017, the rate of the income tax on capital gains accrued by non-Brazilian resident individuals may vary between 15% and 22.5% depending on the capital gain amount. Ultimately, a 25% rate may apply if the capital gain is realized by investors located at Low or Nil Tax Jurisdictions (i.e., a country that does not impose any income tax or that imposes tax at a maximum rate of less than 17%). Although we believe that the ADSs will not fall within the definition of assets located in Brazil for the purposes of Law No. 10,833/2003, considering its general and unclear scope and the absence of any judicial guidance in respect thereof, we are unable to predict whether such interpretation will ultimately prevail in the Brazilian courts. See “Item 10. Additional Information—E. Taxation—Brazilian Tax Considerations.” Gains realized by non-Brazilian holders on dispositions of common shares in Brazil or in transactions with Brazilian residents may be exempt from Brazilian income tax or taxed at a rate that may vary between 15% and 25%, depending on the circumstances. Gains realized through transactions on Brazilian stock exchanges are exempt from the Brazilian income tax, provided that the transactions are carried out in accordance with the Brazilian National Monetary Council’s (Conselho Monetário Nacional), or CMN’s, Resolution CMN 4,373 (that replaced Resolution CMN 2,689) and the foreign investor is not located in Low or Nil Tax Jurisdictions. Gains realized through transactions with Brazilian residents or not executed on the Brazilian stock exchanges are subject to tax at a rate (1) that may vary between 15% and 22.5% depending on the capital gain amount if the investors are located in regular taxation jurisdictions, or (2) of 25% if the capital gain is realized by investors located in Low or Nil Tax Jurisdictions. In December 2024, Resolution CMN 4,373 was replaced by Resolution No. 13, issued jointly by CVM and Central Bank, which came into effect in 2025. Based on our understanding, the abovementioned tax treatment is expected to remain unchanged. Nevertheless, non-Brazilian holders should consult their own tax advisors regarding the implications of this matter. Please refer to “Item 10. Additional Information––E. Taxation––Brazilian Tax Considerations––Taxation of Gains.” An exchange of ADSs for common shares risks loss of certain foreign currency remittance and Brazilian tax advantages. The ADSs benefit from the certificate of foreign capital registration, which permits J.P. Morgan Chase Bank, N.A. (“J.P. Morgan”), as depositary, to convert dividends and other distributions with respect to common shares into foreign currency, and to remit the proceeds abroad. Holders of ADSs who exchange their ADSs for common shares will then be entitled to rely on the depositary’s certificate of foreign capital registration for five business days from the date of exchange. Thereafter, they will not be able to remit non-Brazilian currency abroad unless they obtain their own certificate of foreign capital registration, or unless they qualify under Resolution CMN 4,373, which entitles certain investors to buy and sell shares on Brazilian stock exchanges without obtaining separate certificates of registration. If holders of ADSs do not qualify under Resolution CMN 4,373, they will generally be subject to less favorable tax treatment on distributions with respect to our common shares. There can be no assurance that the depositary’s certificate of registration or any certificate of foreign capital registration obtained by holders of ADSs will not be affected by future legislative or regulatory changes, or that additional Brazilian law restrictions applicable to their investment in the ADSs may not be imposed in the future. As previously mentioned, it is worth noting that Resolution CMN 4,373 was replaced by Resolution No. 13, issued jointly by CVM and the Central Bank of Brazil, in December 2024. According to our interpretation of Resolution No. 13, if holders of ADSs do not qualify under Resolution No. 13 or reside in a Low or Nil Tax Jurisdiction, they will be subject to less favorable tax treatment on distributions with respect to our common shares. Brazilian law allows for the Brazilian government to impose temporary restrictions, whenever there is a significant imbalance in Brazil’s balance of payments or a significant possibility that such imbalance will exist, on the remittance to foreign investors of the proceeds of their investments in Brazil, as well as on the conversion of the real into foreign currencies. The Brazilian government may, in the future, restrict companies from paying amounts denominated in foreign currency or require that any such payment be made in reais. If similar restrictions are introduced in the future, they would likely have an adverse effect on the market price of our shares and ADSs. Such restrictions could hinder or prevent the holders of our shares or the custodian of our shares in Brazil, J.P. Morgan, from remitting dividends abroad. A more restrictive policy could also increase the cost of servicing, and thereby reduce our ability to pay, our foreign currency-denominated debt obligations and other liabilities. If we fail to make payments under any of these obligations, we will be in default under those obligations, which could reduce our liquidity as well as the market price of our common shares, shares and ADSs.
A. History and Development of the Company Basic Information TIM S.A., formerly known as Intelig Telecomunicações Ltda., a publicly-held company (sociedade anônima) organized under the laws of the Federative Republic of Brazil, incorporated in the Federative Republic of Brazil fo…
A. History and Development of the Company Basic Information TIM S.A., formerly known as Intelig Telecomunicações Ltda., a publicly-held company (sociedade anônima) organized under the laws of the Federative Republic of Brazil, incorporated in the Federative Republic of Brazil for an indefinite period on March 9, 1998. Our headquarters are located at João Cabral de Melo Neto Avenue, 850 – South Tower – 12th floor, 22775-055, Rio de Janeiro, Brazil and our telephone number is +55 21 4109 4167. Our agent for service of process in the United States is Puglisi & Associates located at 850 Library Avenue, Suite 204, Newark, Delaware 19711. The SEC maintains an Internet site that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC at http://sec.gov. Our website address is http://www.tim.com.br. Information contained on, or that can be accessed through, our website does not constitute a part of this annual report. Historical Background Privatization and summary In July 1998, as part of the privatization of Telebrás, the Brazilian state-owned telecommunications monopoly, the Brazilian Federal Government sold substantially all of its shares issued by the 12 holding companies into which Telebrás had initially been broken up, including its shares of Tele Sudeste Celular Participações S.A. (“TSU”), and Tele Nordeste Celular Participações S.A. (“TND”). Following a series of acquisitions, corporate reorganizations and corporate name changes, TSU and TND merged to form TIM Participações S.A. (“TIM Participações”) in 2004. We continued to expand and restructure our operations through a series of corporate reorganizations, mergers, acquisitions and name changes as described below, and a majority of our share capital is currently held, directly and indirectly, by Telecom Italia (which began operating in Brazil in 1998 as Telecom Italia Mobile) through its wholly owned subsidiary, TIM Brasil, formed in 2002 as the holding company of Telecom Italia’s operating companies in Brazil. In turn, the largest shareholder of Telecom Italia are Poste Italiane S.p.A. (successor of Cassa Depositi e Prestiti) and BlackRock, which are able to exercise significant influence over Telecom Italia. In 2019, Telecom Italia delisted all of its U.S. listed securities and deregistered from the SEC, having filed Form 15F on July 9, 2019. On February 17, 2023, TIM Brasil obtained registration by the CVM as a publicly-held company in category B. See “—C. Organizational Structure” for a description of our current corporate structure. Acquisition of Intelig In 2009, we acquired 100% of Intelig’s share capital from Holdco Participações Ltda. As a result, Intelig became our wholly owned subsidiary. The acquisition of Intelig (prior to being renamed TIM S.A. in September 2017, as a result of the Reorganization) brought material advantages through significant synergies with its network, such as its metropolitan fiber optic network and its large backbone that allowed us to accelerate the development of our 3G network and generate significant operational cost savings. Merger of TIM Celular In 2011, TIM Celular (which was subsequently merged into us as a result of the Reorganization) entered into an agreement with Companhia Brasiliana de Energia and AES Elpa (the AES Group in Brazil) for the purchase of all of AES Elpa’s equity interests in Eletropaulo Telecomunicações and 98.3% of the interest of AES RJ, (“AES Atimus Acquisition”). In connection with the acquisition, Eletropaulo Telecomunicações changed its corporate name to TIM Fiber SP Ltda. (“TIM Fiber SP”), and AES RJ changed its corporate name to TIM Fiber RJ S.A. (“TIM Fiber RJ”). Both entities were collectively referred to as TIM Fiber. In accordance with the corporate reorganization of TIM Fiber, TIM Fiber RJ and TIM Fiber SP were merged into TIM Celular in 2012, which was the former entity that used to own and operate the fiber optic network in metropolitan São Paulo and Rio de Janeiro (and which, as discussed below, itself was merged into the Company in October 2018 as a result of the Reorganization). The purpose of this reorganization was to simplify our organizational structure and improve the administrative, operational and financial efficiency of the companies controlled by us. TIM’s Corporate Reorganization On July 25, 2017, the Board of Directors of TIM Participações approved a corporate reorganization of its then subsidiaries, TIM Celular and the Company (formerly known as Intelig). On September 6, 2017, as the first phase of such corporate reorganization, Intelig altered its articles of association to change the company from a limited liability company to an unlisted limited liability corporation, and to change its corporate name to TIM S.A. As discussed in more detail below (see “—C. Organizational Structure”), in October 2018, the second phase of this corporate reorganization resulted in the merger of TIM Celular into the Company. This merger was part of the Reorganization and achieved its objective of capturing operating and financial synergies, through the implementation of a more efficient operating structure, as well as accounting and internal control systems. Merger and succession of NYSE and B3 listing On July 29, 2020, the shareholders of TIM Participações (our former parent holding company) and our shareholders approved, by a majority of votes, the merger of TIM Participações into us, pursuant to the terms of the Protocolo e Justificação de Incorporação. On July 29, 2020, the boards of directors of each of the companies approved the execution of a Merger Agreement (protocolo de incorporação). The merger of TIM Participações into us, previously a wholly owned subsidiary of TIM Participações, became effective on September 28, 2020 (the “Merger”). Consequently, TIM Participações, our former parent holding company, was merged into us as a result of the Merger. The common shares of TIM Participações had been listed on the Novo Mercado segment of the B3 S.A. – Brasil, Bolsa, Balcão (the “B3”) (the São Paulo stock exchange) since 2011. On September 28, 2020, because of the Merger, TIM Participações ceased to exist as a separate entity, and we, TIM S.A., continued as the surviving corporation in the Merger, succeeding to all rights and obligations of TIM Participações pursuant to Brazilian corporate law and we became the successor registrant under Rule 12g-3(a) under the Exchange Act. On September 28, 2020, the B3 approved the listing of the merged company and the admission to trading of its shares on the Novo Mercado. In order to be listed on the Novo Mercado, we are required to comply with heightened corporate governance and disclosure requirements, and we are not permitted to issue preferred shares, participation bonuses or any type of shares that have restricted voting rights. On September 28, 2020, we filed a form 6-K pursuant to Rule 12g-3(a) promulgated under the Exchange Act to report this succession in accordance with Rule 12g-3(f) promulgated under the Exchange Act. Pursuant to Rule 12g-3(a) under the Exchange Act, our common shares and our ADSs, as common shares and ADSs of the successor issuer, were deemed registered under Section 12(b) of the Exchange Act. TIM Participações’s common shares and ADSs continued to be traded until October 13, 2020, when our common shares and ADSs started to trade on the B3 and the NYSE, respectively. See “Item 9. The Offer and Listing—A. Offer and Listing Details.” Joint acquisition of Oi Group’s mobile business On March 10, 2020, we disclosed to the market that we, jointly with Telefônica Brasil S.A. (“Vivo”), expressed to Oi Group’s financial advisor, Bank of America Merrill Lynch (“BofA”), our interest in a potential joint acquisition of all or a part of Oi Group’s UPI mobile business. On July 18, 2020, we, together with Vivo and Claro S.A. (“Claro”), submitted a binding offer to Oi Group for the acquisition of all of the mobile assets of the Oi Group, or the UPI Mobile Business. The offer was revised on July 27, 2020, and September 7, 2020 and the latter offer was accepted by Oi Group on December 14, 2020. On December 14, 2020, we, along with Claro and Vivo, were declared the winners of the competitive process of the sale of assets of the mobile telephony operation (Personal Mobile Service) of the Oi Group. In February 2022, the transaction received regulatory approval from CADE and ANATEL. Closing of the transaction occurred on April 20, 2022. As a result of closing the transaction, we became the owner of 100% of the share capital of SPE Cozani, a company that holds part of the assets, rights and obligations business unit of Oi Móvel. The price for 100% of the shares of SPE Cozani, after all the adjustments provided for in the Share Purchase Agreement (“SPA”), was R$6.98 billion. Pursuant to the SPA, of the Adjusted Closing Price: (i) R$634.33 million was withheld by us, mostly for the purposes of covering any additional price adjustments that may need to be made and which may be identified in the 120 days following the closing; (ii) R$2.06 billion was transferred directly to BNDES–- National Bank for Economic and Social Development, per a contractual provision; and (iii) the balance of R$4.29 billion was paid directly to the Seller. With the acquisition completed, our business has taken a significant step forward at a national level, allowing us to compete even more effectively with our main competitors with regard to infrastructure and broad geographic representation of our customer base. Following the closing of the acquisition, on October 3, 2022, we, Claro and Vivo commenced an arbitration procedure before the Market’s Chamber of Arbitration (“CAM/B3”) against Oi Group in order to dispute the post-closing price adjustment of the transaction. On October, 3, 2023, the dispute was resolved due to us, Vivo and Claro entering into an agreement with Oi Group. On October 4, 2023, the Company announced that CAM/B3 approved an agreement in relation to the post-closing adjustment entered into between the Company, Telefônica Brasil S.A., Claro S.A. and Oi S.A. – In Judicial Recovery, resolving the controversy and the arbitration procedure related to the post-closing price adjustment. The final price for the UPI Mobile Assets portion attributed to the Company, considering the post-closing adjustment negotiated in the agreement, was R$6.68 billion, which has been paid in full. As a result of the resolution, all pending issues and disputes between the Company and Oi in relation to the acquisition of UPI Mobile Assets were ended. Partnership with C6 Bank in Brazil From 2020 to early 2025, we maintained a strategic partnership with Banco C6 S.A. (“C6 Bank”), focused on customer-related initiatives. As part of this partnership, we obtained rights to acquire a minority indirect equity interest in C6 Bank, which were partially exercised in 2022, with additional vested rights outstanding thereafter. In 2024, disputes arose between us and C6 Bank in connection with the partnership, which became subject to arbitration proceedings. In 2025, we and C6 Bank entered into a comprehensive settlement agreement that provided for the termination of the partnership, the resolution of all outstanding disputes and the dismissal of the ongoing arbitration proceedings. The agreement sets forth the terms relating to the termination of the partnership with C6 Bank, in addition to the transfer of all outstanding C6 Bank shares and warrants held by us back to C6 Bank in the total amount of R$520 million before taxes. On March 14, 2025, the Cayman Islands Monetary Authority (“CIMA”) approved the transfer of C6 Bank shares to us. Following this approval, on March 20, 2025, we and C6 Bank completed the transaction and all outstanding shares and subscription warrants issued by Carbon Holding Finance S.A. (an entity that indirectly holds a stake at C6 Bank) held by us were transferred to an entity of the C6 Group, as stipulated in the agreement. Consequently, the partnership between the companies was formally terminated, along with all related disputes, leading to the closure of the four arbitration proceedings. TIM and Vivo sharing agreement Since 2020, following the competent authorities’ (CADE and ANATEL) approval, the sharing agreement established between us and Vivo aims to increase the network cost efficiency and synergies that can help us continue to provide innovative and standardized offerings and services, as well as synergies and efficiencies in the allocation of investments and operating costs, through the following initiatives: · Single Grid: sharing of 3G / 4G networks in cities with less than 30 thousand inhabitants, using the MOCN (Multiple-Operator Core Network) architecture, to maintain the infrastructure of only one of the operators in these cities, allowing completely redundant sites to be turned off. As of May 2021, each party increased its 3G and 4G coverage in more than 300 cities with a total of 422 shared sites on each side. From 2021 to 2025, we added further cities within the single network agreement providing 3G and 4G presence. In more than 320 cities, one of the operators disconnected the 3G and 4G networks (resulting in 75% of the agreement perimeter having been deployed); · 2G Switch-off: nationwide sharing of the 2G network using GWCN technology, enabling both operators to switch off part (approximately 50%) of their network with the same technology, consequently saving on energy and maintenance costs. After the sharing period, operators will be able to completely shut down their remaining 2G networks. During 2021, the GWCN was implemented, while quality KPIs were monitored. As a result of the sharing agreement, we shared its 2G network in 785 cities as of December 31, 2025, including important cities such as Rio de Janeiro, Curitiba, Fortaleza, Brasilia, Belem and Recife. As of the same period, Vivo shared its 2G network in 1,063 cities, including cities such as Belo Horizonte, Salvador, Manaus, Porto Alegre and Campinas. As of December 31, 2025, approximately 80% of the agreement perimeter had been deployed. In 2025, the expansion of the original agreement was approved by CADE, with safeguards to preserve competition and monitoring mechanisms established in coordination with ANATEL, which approval is pending. TIM and Stellantis connected cars partnership Since 2020, we and Stellantis, established a partnership to offer connectivity solutions embedded in vehicles of the Fiat, Jeep and RAM brands in Brazil. As part of the global strategy of developing ecosystems for connected services and to enhance the digital experience of customers, Stellantis launches in the country since the first half of 2021 rely on eSIM, with the LTE coverage quality and our IoT network. As a result, all the Stellantis vehicle since then have access to native Wi-Fi onboard eSIM and the cars’ active and real-time communication with the user, the Stellantis and the dealer network. In addition to such features, this technology focusses on safety, allowing remote identification of possible vehicle failures with the possibility of more agile and accurate diagnoses. In 2021, a Proof of Concept (“PoC”) was launched in the Stellantis factory in Goiana/PE using 5G connectivity to investigate the benefits of this technology and enabling the use of new applications on a large scale, from the use case of AI to the automated processing of images. The PoC evolved in 2022 to a new phase which will enable an Edge 5G SA Private Core and an Edge Cloud environment, achieving greater computing capacity, greater scalability, and allowing the application to perform in an environment with higher throughput and low latency. During 2023, Stellantis announced an expanded partnership with us for the Rampage pickup, the first RAM project conceived and developed in Brazil. Already integrated into more than 200,000 Jeep and Fiat vehicles, our presence extends to American manufacturer models, providing 4G internet for the RAM Connect platform. This technology grants consumers access to a diverse range of in-vehicle services and entertainment. Also in 2023, we joined the Conecta 2030 Project, which is a collaborative effort with partners, such as Stellantis and IPFacens (Research Institute of the Facens University Center). Pursuant to this project, IPFacens received a R$3 million grant from the Brazilian government, dedicated to enhancing pedestrian and cyclist safety through cutting-edge technology and 5G connectivity. This project remained ongoing through 2024. In 2024, we strengthened our partnership with Stellantis by securing a new agreement for the implementation of the connected car solution at Peugeot, with implementation set to begin in 2025. Additionally, we expanded connectivity services by extending corporate Wi-Fi capabilities to the RAM and Jeep brands. By the end of 2024, we achieved a milestone of over 330,000 connected cars in Brazil. In 2025, our partnership with Stellantis continued to strengthen, supporting the expansion of connected vehicle services and industrial innovation. During the year, Stellantis expanded its installed base to more than 400,000 connected vehicles in Brazil, all supported by our connectivity infrastructure, enabling the continued growth and scalability of digital services offered to drivers. I-Systems (formerly FiberCo) Formation and Sale of Equity Interest On December 10, 2020, our Board of Directors approved the formation of FiberCo, in preparation for a possible future segregation of assets and provision of fiber infrastructure services. This process was one of the intermediate steps in the transformation of our broadband services, and it aimed to create an open fiber infrastructure vehicle to allow us to attract a strategic partner as a shareholder of FiberCo. We expected FiberCo to operate in the wholesale market and to provide fiber connectivity services for the last mile and a transport network, for all market operators, having us as an anchor customer. We expected FiberCo to allow us to achieve our expected growth in the Brazilian fiber market in the coming years, taking advantage of the open network and using a focused operating model. This transaction aimed to accelerate the growth of our residential broadband business and unlock additional value from our existing infrastructure. Accordingly, on March 3, 2021, we entered into an exclusivity agreement with IHS Brasil Participações Ltda. (“IHS”), a large and diversified provider of telecommunications infrastructure, to negotiate the terms and conditions for the acquisition of an equity interest in FiberCo by IHS. The operation was approved by CADE on June 16 2021, and by ANATEL on November 11, 2021. On November 16, 2021, after regulatory authorizations from ANATEL and CADE, IHS Fiber Brasil – Cessão de Infraestruturas Ltda. (“IHS Fiber”), acquired from us a controlling equity interest in FiberCo. In the aftermath, IHS Fiber changed the name of FiberCo to I-Systems. Following this transaction, IHS Fiber held 51% of I-Systems’s share capital, with the remaining 49% held by us. In November 2021, we entered into an agreement with I-Systems for the provision of technical and administrative services (TAS) by us to I-Systems for an initial term of 18 months. As this original term proved insufficient for I-Systems to complete the required integration of activities, we entered into an addendum in 2023 extending the term of the agreement through the end of 2023. As a result of this extension, which covered an additional seven-month period, the aggregate amount payable in connection with the TAS totaled R$78.7 million. On April 30, 2024, we entered into an agreement with I-Systems to terminate the provision of TAS, pursuant to which I-Systems paid all amounts due for services rendered. Since 2021, I-Systems has also provided us with certain fiber infrastructure services, enabling us to deliver residential broadband services and other offerings to our customers. On February 11, 2026, we entered into a share purchase agreement with IHS Fiber to acquire their 51% ownership interest in I-Systems for a total consideration of R$950 million, payable on the closing date of the transaction. The completion of this transaction is contingent upon the fulfillment of certain customary precedent conditions, as well as any necessary corporate approvals, as applicable. In March 2026, Anatel and CADE approved the transaction. Partnership between TIM and Cartão de Todos (Health) In August 2023, we started the commercial operation of the partnership with Grupo Cartão de TODOS. The operation began in some states of Brazil and expanded throughout 2023, reaching 5 Brazilian states at the end of 2023. Four types of packages were offered to our customers in a family and individual format, offering telemedicine services, discounts on medical appointments with specialists, discounts on exams and medications. In May 2024, the subscription journey was redesigned to focus on the partnership landing page rather than the mobile application. At the same time, we streamlined the product portfolio to prioritize the Cartão de TODOS offering, reflecting its stronger value proposition. As part of this evolution, we provided customers with exclusive benefits, including three months of subscription fees at no cost and a full waiver of the activation fee, resulting in average savings of approximately R$124 per customer. By 2025, we took another step forward in enhancing the partnership. We expanded the service model—which was previously digital-only—to include in-person support at Cartão de TODOS physical units through their franchise network. This change brings more autonomy, proximity, and convenience to our customers. Partnership between TIM and FS Group In line with our customer platform strategy, following a number of other strategic partnerships, in May 2022, we entered into a new strategic partnership with FS Security to establish a new company, EXA Serviços de Tecnologia, dedicated to digital security solutions and entertainment for end consumers while also making it available as a white-label model for other operators. This partnership was approved by CADE, without restrictions, on July 29, 2022. The partnership allows us to launch digital products on e-books (digital e-books, audiobooks and minibooks) and education services to our customers directly in their plans through the Aya Ensinah application. These products and services provide access to digital summaries of materials related to a wide variety of secondary and fundamental education subjects, in addition to security services such as cloud storage, VPN, antivirus, among others. By the end of 2024, FS Security and us concluded the renegotiation of certain terms of the partnership and, as a result, we acquired rights to subscribe a 27% stake in EXA Serviços de Tecnologia, which can be exercised within 24 months. The exercise price is R$1 for all shares. We may exercise it at any time and at its sole discretion, within 24 months. In 2025, we expanded our digital offerings by launching Aya Equilibrah, which provides content focused on physical, mental and social well-being, and Aya Idiomas, which offers language-learning content, including grammar and pronunciation studies, educational materials and practice via WhatsApp. In addition, we began offering device insurance products exclusively to control and postpaid customers purchasing devices at our retail stores, including coverage options for (i) total protection, (ii) breakage and damage, and (iii) theft and robbery. TIM Ads: Mobile Advertising Since 2020, we have been investing in our digital advertising platform, TIM Ads, as part of our data monetization and technological innovation strategy. This initiative connects brands and consumers through data-driven and technology-based solutions, ensuring full compliance with Brazil’s General Data Protection Law (LGPD). In 2025, TIM Ads reached over 34 million active users who consented to receiving advertising communications and leveraged more than 1,000 attributes for segmentation through the TIM Insights intelligence solution. The platform offers a full-funnel approach, covering lead generation, traffic increase, and targeted campaigns across both internal and external channels. In 2025, enlarging our audience touchpoints, we launched RCS on iOS in partnership with Google. Additionally, TIM Ads ensures advertiser with its brand safety and avoiding fraudulent interactions and promoting genuine engagement. As of December 31, 2025, TIM Ads had already been adopted by more than 550 companies across 40 industries, establishing itself as a competitive advantage for us and our commercial partners. TIM Data: Data Monetization and API Solutions Since 2020, we have been strengthening our data monetization strategy through the TIM Data platform, offering innovative API-based solutions to meet the demands of an increasing digital market. With over 60 million customers across Brazil and a database of more than 1,000 data attributes, TIM Data enables the creation of personalized, real-time solutions for a wide range of industries, including banking, e-commerce, insurance and service applications. TIM Data’s solutions include tools for identity verification (KYC), customized credit analysis, location validation, customer authentication and fraud prevention using SIM card and device information, as well as the mobile number’s history at the operator. Through the Open Gateway initiative, aligned with GSMA's global standards, TIM Data promotes the standardization and integration of fully secure APIs that comply with Brazil’s General Data Protection Law (LGPD). This approach strengthens the digital ecosystem by enabling secure interactions, streamlined user journeys, and hyper-personalized offers, driving customer engagement and loyalty. 5G Auction in 2021 In November 2021, the 5G auction was held. In the auction, we acquired 11 lots, with a total value offered of R$1.05 billion, in three frequency bands: 3.5 GHz, 2.3 GHz and 26 GHz. The acquired bands have a set of obligations that must be met with financial contributions or the construction of mobile and fixed network infrastructure. As a result, we have rights to the spectrum capacity that we consider necessary to follow our growth journey in the mobile telephony market nationwide, as well as preparing ourselves for customers’ demands and the ability to explore new use applications and develop innovative solutions that require high-speed connectivity and capacity. The main commitments associated with each band are as follows: · 2.3 GHz: 4G coverage in approximately 1,000 localities (in the South and Southeast Regions of Brazil, not including the state of São Paulo); · 3.5 GHz: 5G coverage in all municipalities with a population equal to or greater than 30,000 inhabitants until 2029, plus fiber backhaul obligations in 138 municipalities plus additional contributions to a new entity (EAF) to carry out the following projects: clean-up 3.5 GHz, deployment of fiber in Amazonia and building a private network for exclusive Brazilian Federal Government use; and · 26 GHz: contributions to a new entity (EACE) to carry out connectivity schools projects. Important Events 4G and 5G Expansion In March 2022, we achieved a significant milestone in the Brazilian telecommunications industry by completing the core of our 5G SA network. Following this achievement, we expanded in 2022 our 5G SA coverage to include all 26 capitals and the Federal District (Brasília), aligning with ANATEL 5G Auction schedule. By the end of 2023, we successfully deployed our 5G SA network core in more than 200 cities. Notably, in nine cities — Brasília, Rio de Janeiro, Recife, São Paulo, Curitiba, Salvador, Fortaleza, Belo Horizonte, and Goiânia — we had achieved 100% neighborhood coverage with 5G SA by the end of 2023. Furthermore, in 2023, we became the first and only telecommunications operator covering all municipalities in Brazil with our 4G network. As of December 31, 2025, our 4G network covered all 5,570 Brazilian cities. Besides access layer, we have increased optical backhaul (FTTS – Fiber To The Site) through new implantations or strategic partnership with neutral operators (such as V-Tal), adding more than 2.400 sites connected to the fiber at the end of 2025. In 2024, we have expanded 5G coverage, reaching 607 cities throughout Brazil, allowing traffic growth through a faster and more efficient network. As a result, TIM was recognized by the OpenSignal with first 5G Consistent Quality award. In 2025, we continued accelerating our nationwide 5G expansion and reached more than 1,000 cities in Brazil, ensuring coverage in all state capitals and in every municipality with more than 500,000 inhabitants. This milestone reflects our commitment to delivering high-performance mobile connectivity to the country’s most populated and economically relevant urban centers, while advancing the modernization of our network infrastructure. Strategic Planning TIM’s Strategic Plan establishes the Company’s strategic direction for the coming years, linking its long-term vision to day-to-day decision-making with a focus on sustainable growth, operational efficiency, customer experience, and value creation. Although structured as a three-year plan, it is reviewed annually to ensure continued alignment with evolving market trends, technological developments, customer behavior, and competitive dynamics. In addition, the plan is subject to continuous monitoring throughout the year to track the execution of strategic initiatives and their outcomes. In recent years, TIM has advanced in several structuring initiatives that have strengthened its competitive position and support the current strategic plan. The most notable of these was the consistent evolution of its Network, which consolidated TIM as a quality benchmark in Brazil, with broader coverage, presence in more cities, and accelerated expansion of 5G, ensuring a superior experience for millions of customers. Another decisive development was the acceleration of B2B services and the creation of new growth avenues—such as IoT, digital solutions, and advanced connectivity—which position TIM as a company increasingly driven by technology, data, and solutions that extend beyond traditional connectivity. In February 2026, the Company announced its 2026–2028 Strategic Plan, built on six pillars that balance growth, profitability, efficiency, technological transformation, and sustainability. These pillars guide strategic choices and serve as reference points for decisions and priorities across the organization: 1. Mobile: Customer-first approach as a driver of profitability; 2. Broadband: Sustainable growth with optionality for the future 3. B2B:Accelerating along a new growth trajectory 4. Cross-organizational AI Transformation 5. Efficiency as a key engine of value creation 6. ESG:Foundation of the strategy and embedded throughout the Company In summary, the Plan envisions real service-revenue growth above inflation, supported by the continued sustainability of the mobile segment, renewed growth in broadband, and the strengthening of B2B solutions, with particular emphasis on higher-value offerings. EBITDA and margin expansion are expected to be driven by cost discipline, digitalization, and efficiency gains generated through Artificial Intelligence. Additionally, efficient capital allocation—focused on network quality and technological evolution—is expected to contribute to the growth of Operating Cash Flow. As a result, the Company intends to continue accelerating its shareholder-remuneration strategy. Reverse Split and Subsequent Split On February 24, 2025, our Board of Directors approved a reverse split and subsequent split of our common shares, at a ratio of 100:1 followed by 1:100, without affecting our capital stock, number of shares or ADRs. The operation aims to increase share liquidity, reduce administrative expenses, and enhance shareholder management. Shareholders had a 30-day period to adjust their positions, after which fractional shares have been sold at auction, with proceeds distributed proportionally. The reverse split and subsequent split was approved in the shareholders meeting held on March 27, 2025. The adjustment period commenced on June 2, 2025 and ended on July 7, 2025. Following the end of the adjustment period, an auction of 22,059,698 fractional shares was conducted on July 14, 2025, resulting in aggregate proceeds of R$455.7 million, which were distributed proportionally to the holders of such fractional shares. Share Buyback Program On February 12, 2025, our Board of Directors approved a share buyback program for up to 67,210,173 of our common shares, representing approximately 2.78% of our outstanding common shares, to be held in treasury and subsequently cancelled, without a reduction of our capital stock. We believe that this share buyback program may enhance shareholder value through the efficient use of available cash resources and improved capital allocation. In addition, a portion of the shares repurchased under the share buyback program may be allocated to support equity-based compensation under our Long-Term Incentive Plan (“LTI”). The shares allocated to the LTI represent less than 8% of the total number of shares authorized to be repurchased (approximately five million shares). Our management retains discretion to determine the timing and execution of share repurchases within the term of the program and may conduct one or more transactions. As of December 31, 2025, approximately 74.79% of the share buyback program had been executed, with 33.5 million common shares repurchased, for an aggregate consideration of approximately R$747.88 million. Of the 33.5 million common shares repurchased in the program, 28,678,509 were cancelled. Capital Contribution - 5G Investment Fund As previously disclosed, we established a venture capital fund in partnership with Upload Ventures Growth, LP (“Upload”), with the objective of supporting early-stage companies with growth potential in Latin America. The vehicle targets startups and scaleups with validated business models and clear expansion plans, which may also benefit from access to our industrial and technological infrastructure to accelerate scalability. In 2025, the Fund had delivered R$ 78 million in gains for the Company, with performance supported by all three current portfolio companies. The fund’s investees include Topsort, a retail-media technology platform; Simetrik, a financial reconciliation infrastructure provider; and Tractian, an industrial predictive-maintenance solutions company. The Fund has an independent management where Upload is the General Partner responsible for the fundraising, selection and ongoing monitoring of portfolio companies Recent Developments Strategic Agreement with American Tower do Brasil On March 2, 2026, Company has signed a new strategic agreement with American Tower do Brasil (“ATC”), redefining the terms of their infrastructure partnership. The agreement consolidates all existing contracts into a single framework covering approximately 9,000 towers—about 30% of our infrastructure park—with a unified term extending through 2034. The initiative represents a relevant step in the long-term relationship between ATC and us, reinforcing our continuous commitment to operational efficiency, simplification of governance and sustainable evolution of the network. The agreement is part of our lease efficiency plan and supports the achievement of the objectives and goals that make up our strategic plan. Acquisition of V8.Tech On November 26, 2025, we entered into share purchase agreement for the acquisition of 100% of the share capital of V8 Consulting S.A. (“V8.Tech”) for an initial purchase price of R$140 million. This amount may be increased by additional earn-out payments of up to R$140 million, contingent upon the achievement of certain conditions over a period of six years. V8.Tech is a technology company specializing in digital solutions integration, cloud services and managed services, with a strong emphasis on digital transformation, cloud computing, and artificial intelligence. On January 30, 2026, following the satisfaction of all conditions precedent, including the receipt of approval from CADE, the transaction was completed. Acquisition of I-Systems On February 11, 2026, we entered into a share purchase agreement with IHS Fiber to acquire their 51% ownership interest in I-Systems for a total consideration of R$950 million, payable on the closing date of the transaction. The completion of this transaction is contingent upon the fulfillment of certain customary conditions precedent, as well as, any necessary corporate approvals, as applicable. In March 2026, Anatel and CADE approved the transaction. After the completion of this transaction, we will hold 100% of the share capital of I-Systems. B. Business Overview Market Characteristics The telecommunications sector in Brazil is marked by a high degree of competition and by the effective regulation of the National Telecommunications Agency, or ANATEL, which has a stated purpose of “promoting the development of telecommunications in Brazil, in order to provide it with a modern and efficient telecommunications infrastructure, capable of offering society appropriate and diversified services at fair prices nationwide.” After 2023, with the subsiding of the COVID-19 pandemic, the telecommunications sector presented a relief in performance. The sector maintained a growth trajectory in terms of data consumption, and as such, operators were required to adapt their networks and face the challenge of delivering an increasingly robust infrastructure in an environment which requires greater rationality of investments, including on projects such as the densification of sites, frequency refarming, and the aggregation of carriers on two or three frequencies. Furthermore, we continue to advance in sharing initiatives focused on 4G and transport network, despite accelerating the rollout of our 5G coverage to optimize traffic offload. This network evolution has allowed for a better usage experience, both in terms of performance – with higher download and upload speeds and lower latency – as well as in indoor coverage and greater penetration. Throughout its history, the Brazilian telecommunications sector has always been impacted by fierce competition, evidenced by the presence of aggressive marketing offers, including the add-on content offered to customers and strong price competition. However, in recent years, we have observed this competition begin to focus more on quality and service. Once the acquisition of Oi Móvel’s mobile assets was concluded in 2023, the Brazilian telecommunications market came to be operated by three major companies, enabling in our view a healthier and more favorable competition to the benefit of Brazilian consumers. Also in 2023, we completed the merger of Cozani, the special purpose company acquired from Oi S.A., simplifying our corporate structure, and resulting in an optimization of operating costs and the efficient allocation of investments due to the integration of merged assets, improving the coverage and quality of services provided to our customers. Since the introduction of 5G technology in Brazil in 2022, we have consistently broadened our 5G footprint, following the strategy focused on antenna densification to ensure end-to-end coverage. By the end of 2025, we surpassed the mark of 1,000 cities covered with high-speed connection, achieving 100% 5G coverage in substantially all populated neighborhoods of the 26 state capitals in Brazil and the Federal District (Brasilia). Mobile Market Developments The following table shows the data of Brazilian mobile market during the periods presented. As of December 31, 2025 2024 2023 Brazilian wireless subscriber base (million)(1) 270.4 263.4 256.4 Prepaid lines (million) 94.5 102.2 107.5 Postpaid lines (million) 175.9 161.2 148.9 Estimated total penetration (%)(2) 126.7 123.9 126.1 (1) Source: ANATEL. (2) Based on information published by ANATEL. The Brazilian mobile market reported an increase in subscriber base of 2.7% year-on-year (“YoY”), maintaining the growth trend seen in the last year. In 2025, the number of postpaid users reached 175.9 million. Since 2021, the prepaid customer base has no longer been the market's largest portion and has continued to decline relative to postpaid customers. As of December 31, 2025, prepaid customers accounted for 35.0% of the total subscriber base, down from 38.8% on December 31, 2024. The reduction in the overall number of prepaid users is mainly due to the acceleration in users consolidating multiple SIM cards into a single SIM, high penetration of mobile service and the rapid substitution of voice with data usage, resulting in a decrease in the so-called “community effect,” where consumers value a telecommunications system more as more users adopt it. The postpaid, however, experienced an increase of 9.1% during 2025, reaching 65.0% of the total subscriber base as of December 31, 2025, as compared to 61.2% as of December 31, 2024, driven by operators’ efforts to monetize their customer base, offering more data, content and digital services, and the migration of customers from prepaid to control plans, and from entrance plans to postpaid plans. Mobile Competitors TIM is the brand name under which we market our mobile telecommunications services, offering 5G NSA/SA, NB-IoT, 4G, 3G and GSM technologies. Currently, we hold mobile licenses for each of the ten wireless areas of Brazil recognized by ANATEL, making us a mobile operator in Brazil offering complete nationwide 4G coverage. In two of our ten areas, we are the Telebrás legacy provider. See “—A. History and Development of the Company—Historical Background.” In addition to us, as of December 31, 2025 there were two other major participants in the Brazilian mobile market that offer nationwide coverage in all ANATEL wireless areas: Vivo and Claro, given that Oi was acquired by Claro, Vivo and us in April 2022. See “—A. History and Development of the Company—Historical Background.” Currently, we are ahead of our competitors in rolling out new technologies: our 4G network covers 100% of Brazil’s municipalities, including via VoLTE. We are ahead of other operators in terms of number of municipalities covered with 5G technology, covering more than 1,000 Brazilian cities with our fifth-generation network (as of December 31, 2025), bringing 5G to almost 70% of Brazil's urban population and consolidating our position in faster and lower-latency 5G technology. The Brazilian mobile telecommunications industry is highly competitive. In addition to competition from the traditional operators with significant market power and from already established regional players, new entrants can cause an impact both in terms of loss of market share and reduction in the sector's revenue set, by changing the pricing market rationality and new value propositions. Any adverse effects on our results and market share from competitive pressures will depend on a variety of factors that cannot be precisely assessed and are beyond our control. Among such factors are our competitors’ size, experience, business strategies and capabilities, the prevailing market conditions, and the applicable regulations. Other Competition We also compete with landline telephone service providers, of which the incumbent providers in Brazil (Oi, Vivo and Embratel Participações S.A. (owned by America Movil), as well as Algar Telecom, a regional incumbent), and some other relevant players (GVT, acquired by Vivo, and Net Serviços de Comunicação S.A., owned by America Movil), offer packages including voice (both fixed line and mobile), broadband and pay-TV services in bundled offers. Landline providers are, however, required to offer their services to unaffiliated mobile providers on the same basis they are offered to affiliate mobile providers. Our acquisition of Intelig (now known as TIM S.A.) and AES Atimus (later TIM Fiber, which was merged into TIM Celular in 2012, and TIM Celular was merged into the Company in 2018) broadened our participation in the fixed telecommunication sector. In November 2018, ANATEL issued Resolution No. 703/2018, which established new maximum limits on the amount of spectrum bandwidth that a single telecommunications service provider of collective interest, together with its affiliates, subsidiaries or controlling entities, may hold on a primary basis when operating within the same municipality. This regulatory framework is intended to promote competition and ensure the efficient use of spectrum. The consolidated text of Resolution No. 703/2018 was updated by ANATEL in February 2025, without changes to the applicable spectrum caps. In August 2025, ANATEL initiated Tomada de Subsídios No. 5/2025, as part of its 2025–2026 Regulatory Agenda, to reassess the spectrum caps established under Resolution No. 703/2018 in light of market developments following the 5G auction and recent structural changes in the mobile telecommunications sector. This review process may result in future amendments to the spectrum cap framework, which could affect our spectrum strategy and regulatory obligations. In the fixed broadband market, consolidation movements were particularly concentrated in the early years of this decade (2020–2024), driven primarily by transactions between larger operators and smaller regional internet service providers, as well as spin-off transactions aimed at separating integrated operations into customer-focused companies and network-infrastructure-focused companies. In 2025, however, this scenario shifted, with the volume of M&A activity declining and revealing lower underlying organic growth in the sector. This shift has highlighted a more selective and competitive market environment. Looking ahead, potential developments may include a resumption of strategic corporate actions and M&A activity, including transactions in which large national operators could acquire local internet service providers. Such transactions, which have been identified as a potential avenue for further market consolidation, may accelerate the transition to fiber-based networks (FTTH) and generate operational and infrastructure efficiencies for consolidated players. Our Business We are a telecommunications company that offers mobile voice and data services, broadband Internet access, value-added services, and other telecommunications services and products. For a breakdown of our total revenue by category of activity, see “Item 5. Operating and Financial Review and Prospects—Results of Operations for the Year Ended December 31, 2025, compared to the Year Ended December 31, 2024.” We believe that we are well recognized in the market for our strong brand, “TIM”, and for having a reputation as an innovative and disruptive company capable of setting new consumption standards for the market. Our proactive approach allows us to be in a leading position in the transformation of the telecommunications business model. The change in consumer profiles and the emergence of new technologies foster a rupture in the telecommunications industry based on the consumption of digital data, content and services. We are characterized by our pioneering and innovative offerings, among a complete portfolio for individuals as well as corporate solutions for small, medium and large companies. Besides traditional voice and data services, we offer a fixed-line ultra-broadband service, TIM UltraFibra (formerly TIM Live), and we are preparing to offer IoT solutions beyond connectivity, building a complete new source of revenue for the future, with use cases in smart lighting, precision agriculture and constructing 5G based solutions in autonomous operations and video surveillance & analytics, while also looking for new opportunities in other verticals such as logistics and industry 4.0. We also offer a variety of digital content and services in our portfolio of packages, aimed at increasing the day-to-day functionality of our customers’ mobile devices. The ability to manage a complete and varied portfolio gives us the opportunity to offer customized packages to our customers and to provide offers which bundle services, like voice and data, to customers in certain regions. To expand our capabilities in delivering comprehensive digital transformation solutions and to support our long-term strategy focused on the B2B market, we concluded the acquisition of 100% of the share capital of V8.Tech in January 2026. The integration of V8.Tech’s digital and cloud services into our portfolio is expected to enhance our ability to offer end-to-end technology solutions, supported by specialized teams with technical expertise in digital and cloud-based services. In 2025, we continued to advance our innovation strategy across all consumer profiles (prepaid, control and postpaid), with a focus on delivering differentiated products and services. During the year, we expanded the functionality of our customizable bundle offering to the control customer, allowing customers to select, at no additional cost, among certain third-party streaming services, with flexibility to change their selection over time. In the second half of 2025, we also expanded our commercial offering of connected devices by entering into new arrangements with device manufacturers, including becoming the first telecommunications operator in Brazil to integrate the PlayStation 5 into its commercial offerings. These initiatives form part of our broader strategy to differentiate our commercial propositions and strengthen our value proposition to customers. Our strategy for partnerships is focused in delivering increased loyalty and generating incremental value for ourselves. Accordingly, our partnership portfolio is based on content & security (YouTube Premium, Disney+, Apple One, Deezer, HBO Max, Prime Video and EXA), education (Descomplica), health (Cartão de Todos), retail (Zé Delivery), and Energy (Eletrobras and Thoppen). In July 2019, we and Vivo also entered into a memorandum of understanding (the “Vivo MoU”) to engage in negotiations regarding (i) sharing of a single-grid 2G network; (ii) establishment of new infrastructure sharing agreements for the 4G network in 700Mhz, directed to cities with fewer than 30,000 inhabitants, which in the future may be expanded to larger cities; (iii) other network sharing opportunities in other frequencies and technologies; and (iv) other opportunities in efficiency and cost reduction in operations and network maintenance. We believe that implementing the concepts set forth in the Vivo MoU will result in synergies and efficiencies that could help support us in continuing to provide innovative and standard-setting offerings and services, as well as synergies and efficiencies in the allocation of investments and operating costs. In 2025, the expansion of the original agreement was approved by CADE, with safeguards to preserve competition and monitoring mechanisms established in coordination with ANATEL, which approval is pending. The updated arrangement allows for radio access network (“RAN”) sharing in up to 2,049 municipalities for 2G services and in up to 265 municipalities for unified 3G/4G networks under a single-grid model, with implementation expected within a 30-month period. These measures are intended to enhance network efficiency and coverage while ensuring compliance with applicable competition and regulatory requirements. We believe that our robust network infrastructure, our innovative approach, our brand recognition, and our widespread sales network, position us well to capitalize on opportunities in the telecommunications industry in Brazil and meet the constantly changing demands of the mobile telecommunications market. We believe that our main strengths include: High quality services Over the past several years, improvements in national coverage and service quality have led ANATEL to adjust its regulatory approach. While regulatory oversight was previously focused on service quality at a broader, state-level scale, ANATEL has increasingly adopted a more granular framework, emphasizing smaller geographic areas. In response, we have enhanced our internal monitoring of quality and performance indicators at the municipal level to support more rigorous oversight of customer experience. Following the public consultation process, we continue to monitor municipalities classified by ANATEL as “critical” and recently, after the first quality labels published under Resolution No. 717/2019, we begun a new discussion with ANATEL to suspend the labels pending a review of the metrics, considering some identified inconsistencies in our results in comparison with other performance indicators, such as Opensignal. See “—Quality Management Regulation.” Also, an action plan is currently under discussion to accelerate performance improvements and further strengthen the company’s results, following on our Strategic Plan. Notably, we have maintained strong results in 3G/4G data-related indicators, driven by the rapid expansion of our 4G network. According to ANATEL, we are the leading telecommunications provider in terms of the number of cities covered. Our LTE technology also demonstrated strong performance and the inclusion of the NR network in data usage, wide coverage and availability. These results are important due to the strong demand by our customers for this technology. At the end of 2025, approximately 97.6% of our data traffic was carried out over the 4G and 5G network, with an increase of 1.1% compared to the previous year. We believe that the above statistics reflect our commitment to quality infrastructure and our focus on customer experience. However, we recognize that there are some statistics and/or quality measures that use different methodologies, and which may present different results from those that are mentioned above. The results of our digital transformation initiatives continue to expand. The strategy we have adopted for several years to seek digital evolution and constant network development, aiming to ensure innovative solutions, quality and availability of services, offering superior customer experience and strengthening our position in the market has shown itself very effective. We believe that the digital transformation of our services must take place on several fronts, from the sale and activation of the line to post-sale and the so-called “self-caring”, meaning the digital service portals that allow customers to manage profiles and subscriptions, billing, collection, and payment. Even in a challenging year, our digital channels’ positive results and the excellence of services offered to our customers confirm that we had made the right business decisions, demonstrated our capacity to adapt to adverse situations and reinforce our purpose of “evolving together, with courage, transforming technology into freedom.” We believe our ultra-broadband service is also viewed generally as a reference of quality in the sector, driven by our commitment to ensuring a positive customer experience. The service quality of our TIM UltraFibra offer has produced positive results, being repeatedly recognized via awards (e.g. best fixed broadband in the country for the third time, as bestowed in the sixth edition of the Canaltech 2023 Awards) We also seek a strong position in the high-value customer market as a content HUB by offering a variety of plans for individual and family usage, bundling voice and data packages, streaming and other content subscriptions, as well digital value-added services (i.e. music, e-reading, video streaming and games), in order to provide customer custom experience. We believe we are also better able to provide high quality services due to our strong relationship with our suppliers. We operate a system for information technology vendor management to improve the commitment of our suppliers. As a result of this approach, we benefit from enhancements like (i) better accountability of end-to-end vendors on our business processes; (ii) better contractual conditions and savings due to the increase of volumes per vendor; (iii) vendor consolidation and specialization in specific platforms/processes, creating the opportunity for long-term investments in such areas; (iv) active contribution to transformation and simplification; and (v) raising the best practices of Request for Quotation instead of Direct negotiating in order to gain more savings, also increasing the so called Global Deal among us and Telecom Italia with the scope to capture more synergies and quality of the furniture’s by global vendors. These processes were organized and improved through detailed rules such as the Projects Review Board and Investments, and the Function Points Productivity Contractual Auditing. This allowed us to achieve an excellent level of information technology governance, exemplified by better business contribution of each investment due to shared objectives and goals. As a result, we improved our efficacy and efficiency. Finally, we also continue to seek new internal data sources to better understand our users’ perspective and needs, including collecting and analyzing information from applications and investing in the modernization of traditional quality assessment tools. Our commitment to service excellence is reflected in our notable achievements. We are proud to be the first telco company in Brazil to earn and uphold the Procon-SP Efficiency Seal for 30 consecutive months. Additionally, we have consistently maintained the RA1000 seal from Reclame Aqui, which is Brazil's largest, most influential online platform for consumer complaints, reputation analysis, and brand research, achieving a resolution rate of 91.2%. These accomplishments underscore our ongoing dedication to customer satisfaction Open Innovation Program Our Open Innovation Program was established in 2016 as a structured corporate initiative designed to support our strategic priorities through collaboration with startups, technology partners, academic institutions and innovation hubs. Since its inception, the program has focused on identifying, testing and evaluating innovative solutions that may contribute to network evolution, digital services, B2B solutions, operational efficiency and improvements in customer experience. Over time, we have developed long-term relationships with established innovation ecosystems, including hubs, universities, incubators and accelerators. Through these initiatives, we have engaged with more than 500 startups and entered into approximately 50 commercial agreements across different business areas, subject to our internal governance and approval processes. We also maintain an ongoing collaboration with Cubo Itaú, one of the leading innovation hubs in Latin America, where we have established a sustained presence and structured interaction with startups and innovation partners. The Open Innovation Program operates through structured mechanisms, including solution scouting, customized Innovation Days, innovation challenges, pilot projects and proofs of concept. These initiatives enable us to assess emerging technologies and business models in controlled environments, supporting informed decision-making regarding potential adoption while mitigating operational, technological and compliance risks. As part of these initiatives, we have promoted Innovation Days focused on specific corporate areas, resulting in interactions with a broad range of startups. Through internal challenge programs, we have completed multiple startup engagements in areas such as non-commercial anti-fraud solutions, sales support and network development. Certain initiatives have resulted in the development and testing of digital solutions integrated with our technology platforms, including application programming interfaces (APIs), and aligned with our business strategy. All initiatives under the Open Innovation Program are subject to internal governance processes, including predefined selection criteria, technical and business evaluations, and compliance with applicable corporate, legal and regulatory policies. Participation in the program, as well as the execution of pilot projects, hackathons or proofs of concept, does not imply any automatic commercial engagement, financial investment or long-term contractual commitment. The Open Innovation Program also supports the monitoring of technological and market trends through structured internal processes, contributing insights that may inform strategic planning and innovation priorities. Through solution scouting and experimentation initiatives, the program enables us to evaluate new applications and technologies, including those integrated with our digital platforms and APIs. The relevance and maturity of our open innovation initiatives have been recognized by independent institutions. In recent years, we have received recognitions such as the “Selo Dourado” from Cubo Itaú, nominations and rankings from 100 Open Startups, the Valor Inovação award and inclusion among the 20 most innovative companies in Brazil by MIT Technology Review Brazil, reflecting a structured and disciplined approach to open innovation. The Open Innovation Program complements the activities carried out by TIM Lab. While TIM Lab focuses on technical validation, research and development and performance assessment of technologies in controlled test environments, the Open Innovation Program emphasizes external collaboration and business-oriented innovation, supporting the evaluation of solutions with potential strategic and operational impact. A strong brand We believe that our brand, TIM, since the commencement of our operations, has been recognized for leading important developments in the Brazilian telecommunications market and, consistent with our brand identity, we continue to position ourselves at forefront of society’s digital transformation. Our brand tagline “Imagine the possibilities”, invites our customers to view the future in a positive light and demonstrates our commitment to being alongside them as they face new challenges, opening a world of opportunities. To reinforce the positioning of our brand as a brand that values our customers and brings advantages beyond just gigabytes of data, in 2024 we launched an innovative partnership with one of the world's largest beer manufacturers, Ambev, through a summer campaign with the slogan 'Get a Top-up', offering exclusive discounts for customers, transforming prepaid credits into discounts on Zé Delivey (a drink delivery app). In a similar way, beginning in the second half of 2024, we innovated by sending cashback via money to users' checking accounts, through transfers via PIX (financial direct transfer), for top-ups made through its app. Since 2015, we have been the leader in 4G coverage throughout Brazil, even connecting Brazil’s countryside to help facilitate technological innovation in the agribusiness sector - we have approximately 20 million hectares with 4G coverage. Furthermore, we pioneered the activation of 5G networks in Brazil, with our first tests carried out in 2019, and we demonstrated our preparedness for the next generation of mobile networks by launching 5G in all Brazilian state capitals in 2023. Since then, we have stayed ahead of the competition in number of cities covered by 5G (more than 1,000 cities), reinforcing the network strength with the use of “Leader in 5G” claim in the brand communication. We continued to foster our values and beliefs in diversity in inclusion, in 2024, for the second consecutive year, we received recognition from the Instituto +Diversidade and the Human Rights Campaign, the BR Equity Seal - such actions have a profound impact on corporate culture and are part of our strategic plan. Lastly, we kept strengthening our brand association with music through sponsorship of several music events, including the largest festival in Latin America, Rock in Rio, and also, the sponsorship of Festival de Verão Salvador (traditional music festival in Bahia), TIM Music Rio (free concerts on the beaches of Rio de Janeiro) and TIM Music Noites Cariocas (the most iconic event in Rio), adding TV broadcast sponsorship to communicate that “With TIM 5G, music doesn’t stop.” In January 2026, we became an official sponsor of Big Brother Brasil (BBB), one of the largest entertainment platforms and television audiences in Brazil. This sponsorship represents a strategic initiative to enhance our national media presence and expand engagement with different consumer profiles, particularly younger and digitally engaged audiences. The sponsorship aligns with our brand positioning and provides a platform to showcase our connectivity services, mobile plans and digital solutions. It also reflects our broader strategy of investing in high-visibility initiatives aimed at strengthening brand recognition and supporting differentiation in a highly competitive market. Advanced Technology and Innovation Center TIM Lab is a multifunctional testbed environment dedicated to the evaluation of innovative technologies, products and services. Its activities focus on assessing functional efficiency, performance requirements and the development of new technical models and solutions in a controlled environment. TIM Lab brings together engineers, researchers and technical specialists to conduct structured and effective evaluations and operates as a reference center for research and development activities within the Brazilian telecommunications sector. TIM Lab plays a strategic role in supporting service assessment and innovation initiatives across our operations. Its projects contribute to the continuous evolution of our network and address relevant business and market needs, including the evaluation of next-generation network technologies, future internet applications, initiatives with positive social and environmental impact and activities related to open innovation, all subject to internal governance, technical validation and evaluation processes. Throughout 2025, TIM Lab continued to operate as an active environment for technology evaluation and validation, supporting ongoing network evolution and innovation initiatives aligned with our strategic priorities. As of December 31, 2025, we had participated for more than five years in the Telecom Infra Project (“TIP”), an initiative founded by Meta and other industry participants aimed at developing new approaches for building and deploying telecommunications network infrastructure. TIM Lab operates as the first TIP Community Lab in Latin America. In addition, since 2017, TIM Lab has participated as one of the GSMA Mobile IoT Open Labs, a collaborative environment in which companies developing solutions based on cellular low-power wide-area networks work alongside industry experts to test and validate their projects. Within the TIM Lab environment, several technologies relevant to network evolution and our business strategy have been assessed and validated, including: · mobile technologies, such as NB-IoT, 5G New Radio (5G NR) and related standards; · radio access network (RAN) sharing techniques; · Open-RAN solutions; · transport network solutions, such as Defense Wavelength Division Multiplexing (DWDM), disaggregated transport architectures; · broadband/fixed network expansion test scenarios and Multi InfraCo’s scenarios (together with VTAL), with a focus on the interoperability tests of TIM CPEs in the InfraCo’s network, in addition to the various support and testing fronts with I-Systems; · network optimization and automation solutions; · power saving features and energy efficiency solutions; · IP multimedia networks (VoLTE, video over LTE, WiFi calling services, completely laid out functional blocks, and enabled by an IP multimedia subsystem platform); · network functions virtualization (NFV); · Multi-Access Edge Computing MEC; and · 5G network slicing. During 2023, and remaining fully operational throughout 2024 and 2025, TIM Lab migrated to a new location with a fully renovated test environment, with the objective of expanding its technical capacity and supporting our innovation activities. The new facilities were designed to enhance technical capabilities, improve operational efficiency through the use of TIM-owned infrastructure and provide dedicated spaces for the presentation and evaluation of projects with potential business partners and clients. The new location, situated in São Cristóvão, in the state of Rio de Janeiro, has an area of approximately 850 square meters and offers improved connectivity, increased capacity to support innovative projects, integration with cloud environments and dedicated areas for testing 5G technologies and related applications. As part of our digital transformation strategy, we launched the integrated learning program “Onda Digital” (Digital Wave) in 2023, which was further consolidated during 2024 and 2025. The program is designed to strengthen digital mindset capabilities and technical skills across the organization, supporting the adoption of new technologies and working models. As of December 31, 2025, the following educational initiatives were particularly relevant: · TIM Digital & Cultural Mindset Program: a customized assessment and development framework designed to evaluate and enhance the digital maturity of professionals and leaders based on six soft skills: creative thinking, curiosity (learning agility), collaboration (relationship management), sense of responsibility, digital problem solving and focus on customer experience. These competencies were benchmarked against global standards. Tailored learning journeys were implemented for each of the six skills, with approximately 35% of our professionals enrolled as of December 31, 2025. · TIM Data Academy: a structured training initiative focused on strengthening value generation through advanced analytics, increasing the effectiveness of use cases and supporting the development of business opportunities, thereby reinforcing our data-driven culture. As of December 31, 2025, 974 professionals participated in this academy. · TIM Artificial Intelligence Academy: a structured learning journey focused on artificial intelligence, developed in a customized manner and offering multi-format content to specific professional groups, in addition to a foundational AI literacy program that reached approximately 60% of our employees, representing around 5,700 professionals as of December 31, 2025. · TIM Agile Academy: an educational program providing training in agile methodologies to 460 employees, contributing to organizational agility and supporting the effective application of agile practices in our projects. Strong commitment with ESG pillars and the only Brazilian telecommunications company listed on the Novo Mercado for over 10 years Since 2011, we have been part of the Novo Mercado segment of the B3 stock exchange, meaning that we are subject to B3’s highest standard of corporate governance requirements, which includes compliance with heightened requirements not only related to corporate governance, but also to the disclosure of information to the market. We believe that the listing on the Novo Mercado provides greater liquidity and value for our shares and allows us greater access to international markets, promotes the strengthening of our corporate image and increases confidence in us, in addition to reaffirming the long-term commitment of Telecom Italia and its subsidiaries (the “Telecom Italia Group”), in Brazil. We believe listing on the Novo Mercado also aligns the interests among our controlling and minority shareholders with respect to voting rights, tag along rights and dividend policy. In addition, we belong to a select group of companies comprising the portfolio of the Corporate Governance Index and the B3 Tag Along Stock Index, comprised of companies that have been committed to adopt better co-sale protection to minority shareholders, have actively traded in 30% of the trading sessions and do not constitute a penny stock. We are for the eighteenth consecutive year part of the portfolio of the Corporate Sustainability Index of the B3, an index comprised of companies that have a strong commitment to sustainability and social responsibility. In 2025, we also remained one of the constituents of the S&P B3 Brazil ESG and S&P Global LargeMidCap ESG Indices. In January 2025, we were selected to remain in the portfolio of the Carbon Efficient Index, or ICO2, of the B3, with the commitment to measure, disclose and monitor our greenhouse gases, or GHG, emissions, and we were selected to remain in B3’s Great Place to Work Index, or IGPTW, since we remained a GPTW certified company in 2025, recognizing us an employer that creates an outstanding employee experience. The constant pursuit of best environmental, social and governance practices also ensures our presence in several international indexes and ratings, such as FTSE4GOOD Emerging Markets, FTSE4GOOD Latin America, MSCI AWCI ESG Leaders, MSCI Emerging Markets ESG Leaders, FTSE D&I Index, among others. We are, since 2023, the first and only telecom operator listed on B3’s IDIVERSA portfolio, which recognizes Brazilian companies committed to racial and gender diversity. In 2021, we became the first Brazilian operator to integrate the FTSE Diversity & Inclusion Index (formerly Refinitiv D&I Index), occupying since the first position globally in the telecom sector. The index measures the performance of more than 15,500 companies based on diversity, inclusion, and career development initiatives. In 2025, we maintained for the fifth year in a row our leadership in the telecom sector and among all Brazilian companies in the FTSE Diversity & Inclusion Index As a signatory to the Global Compact since 2008 and UN Women since 2021, we promote projects related to the Sustainable Development Goals (“SDG”) and recognize the rights to data privacy, safe internet, access to information and freedom of expression as essential and unnegotiable as part of our efforts to respect Human Rights. As part of our commitment to society in addressing climate change, we conduct periodic mapping of the sources of emissions in our activities. We are able to do so by preparing annually a GHG inventory in accordance with the guidelines of the GHG Protocol (which sets the global standard for how to measure, manage, and report greenhouse gas emissions) and also by working with us in Italy to establish goals aligned with the Science Based Targets Initiative (SBTi), since the companies controlled or related to the TIM Group in Italy (“TIM Group”) joined the initiative in July 2021 with the challenge of keeping global warming limited to 1.5°C, as established in the Paris Agreement. The SBTi aims to promote the best reduction and offsetting of GHG emissions in line with climate science. Since 2010, we have reported our greenhouse gases (GHG) emissions by means of the Carbon Disclosure Project (“CDP”) – the largest database of primary corporate climate change information in the world – and publishes its GHG emissions inventory in accordance with the Brazil GHG Protocol Program. Since 2021, the CDP questionnaire has been integrated by B3 as a crucial part of the methodology for the selection of the constituents of the Corporate Sustainability Index. In 2023, our CDP Climate Change Score improved from B to A, and we were selected to integrate the CDP A-list for three years in a row (2023, 2024 and 2025). Since May 2022, we have publicly declared our support for the recommendations by the Task Force on Climate related Financial Disclosures (TCFD), demonstrating our commitment to better information as a basis for understanding climate risks in our transition to a low carbon economy. We have also aligned our approach to climate risks and opportunities with the TCFD recommendations and published these in an issue brief, updated yearly. We also identify opportunities to improve our levels of excellence in our Environmental Management System (EMS), covering all our operations, based on our Environmental Policy. This includes commitments such as protecting the environment, customer service to the legal requirements and norms of the organization and the continuous improvement of performance in processes and controls, having obtained the ISO14001 environmental certification for Network Management and Operation in the states of Rio de Janeiro, São Paulo and Espírito Santo. Since 2008, we have published our Sustainability Report presenting the main financial and non-financial results, in accordance with the Global Reporting Initiative (“GRI”) Standards methodology. Since 2021, we refer to this publication as the ESG Report and reinforce our commitment to transparency and accountability to our stakeholders, organizing the report into three pillars: Environmental, Social and Governance. Since 2021, the ESG Report also reports the SASB - Sustainability Accounting Standards Board - indicators. Our main policies - such as the Corporate Social Responsibility, Human Rights, Diversity & Inclusion, Environmental, Climate Change, Supplier Relations, Risk Management, Anti-corruption and Safety & Occupational Health Policies - are publicly available to the consultation of our stakeholders. Founded in 2013, Instituto TIM has a mission to democratize access to science, technology and innovation, in order to promote human development in Brazil. More than 700,000 people from all Brazilian states and the Federal District have been benefited by the education and inclusion projects of Instituto TIM, some of which were internationally awarded (i.e., Governarte Awards – BID 2015). Our ESG plan is annually updated together with our strategic plan. Among the established goals for the 2025-27 period, one of our environmental goals is to become a carbon-neutral company by 2030, and net-zero carbon by 2040. In addition, we have undertaken to maintain a policy of using renewable sources for 100% of our energy consumption and to increase by 110% the energy efficiency in data traffic (against the base year of 2019) by 2025. From a social perspective, the main commitments are for our workforce to be comprised of more than 25% of black people and more than 36% of women in leadership positions until 2025, to reach 32 million connected hectares, and to keep our level of employee engagement of at least 82% until 2025. Some of these goals have been included in our MBO and LTI compensation programs, such as the percentage of employee engagement, renewable energy, women in leadership positions, ecoefficiency, recycling of solid waste, black people in leadership positions and reuse or recycling of solid waste. We obtained the ISO 37001 (anti-bribery management systems) and, in 2022, also obtained the ISO 27001 (information security management). Both certifications are key components of our Corporate Governance pillar, which aims to uphold best practices and standards in transparency and anti-corruption, cybersecurity and data protection, and our positioning in ESG indexes and ratings. In 2025, we made significant progress in its take back program for post-consumer electronic waste, with an increase of 880.7% compared to 2024 in terms of the amount of electronic waste captured, with a recycling rate of 98.02%, thus reinserting the relevant products into the transformation chain for other products and contributing to a reduction in the extraction of new raw materials, thereby stimulating the circular economy. There are more than 440 collection points, distributed nationally in our stores and buildings. Additionally, to guarantee a supply chain that adheres to its mission, we carry out the qualification of companies that participate in the bidding process for services considered critical from a socio-environmental point of view, based on the assessment of direct or indirect risks associated with social, environmental, health and safety aspects. In 2025, 354 suppliers were evaluated, and those who failed were not authorized to continue with the contracting process with us. We were also recognized with the 2024 ANATEL Accessibility Award for offering inclusive environments and services for people with disabilities. We strengthened our stance against racism by joining and participating in the Procon SP Racial initiative, carried out in partnership with Zumbi dos Palmares University, promoting the "10 Principles for Combating Racism." To reduce inequalities, we established partnerships with apps such as SOMOS+ and Mulheres Positivas, offering training and employment opportunities for transgender individuals, women, and professionals aged 45 and older. Additionally, collaborations with organizations like Gerando Falcões, Gerando Valkírias, and As Maras supported the training of sales professionals in technology, circular economy practices, and digital inclusion. These efforts included the provision of 5G Kits to the Marte community in São Paulo, along with opportunities for participants to join TIM at the end of the programs. Highly qualified and experienced executives and controlling shareholder support. We have a team of highly qualified executives, widely recognized in the industry and possessing extensive experience in telecommunications markets in Europe and emerging countries. Our executive compensation policy seeks to align the interests of our executives with those of our shareholders, through variable compensation plans and share-based incentives that reward good performance and the accomplishment of certain goals. Our controlling shareholder’s support in our operations is further demonstrated through the sharing of know-how and best practices and development of new solutions for networking, marketing and finance, which are rapidly rolled out under a “plug & play” strategy, under which network innovations may be developed by our parent company first in other regions and then implemented with us. Strong financial position With consistent financial results in recent years, and solid Adjusted EBITDA, according to our internal analysis, we believe that we have a strong cash flow generation, a solid financial position and a low Net Debt to Adjusted EBITDA ratio. In this scenario, we understand that we are in a strong position to take a significant role in potential future consolidations in the market and/or to have a competitive position in important frequency auctions in the years to come. Our Strategy Our Strategic Plan Our 2026–2028 strategic plan continues the strategic direction of our prior plan and aims to further strengthen the TIM brand. It focuses on long-term growth and value creation, supported by revenue expansion, cost-efficiency measures, robust free cash flow generation, disciplined capital allocation, and reinvestment in high-growth opportunities. After a long and intensive journey of development and transformation, we are shaping the next generation of TIM with a well-defined strategy that also adapts to market dynamics. For this reason, our revised plan is structured around six strategic fronts: (a) putting the mobile customer first to drive profitability, ensuring competitiveness across segments through superior network quality, enhanced customer experience supported by AI, and value-driven portfolio innovation; (b) pursuing sustainable broadband growth with optionality for the future, by strengthening operational performance and preserving the flexibility to accelerate as market conditions evolve; (c) accelerating our business-to-business (B2B) trajectory, expanding our portfolio of IoT solutions and technology offerings while advancing Network-as-a-Service capabilities and new data-monetization initiatives; (d) embedding artificial intelligence at a transformative level, positioning TIM as an AI-First organization through interorganizational AI adoption and redesign of processes, customer interactions, and operating models; (e) reinforcing efficiency as a core engine of value creation, combining strict capital allocation discipline with the development of new growth avenues; and (f) placing ESG at the foundation of our strategy, integrating environmental, social, and governance priorities across the Company to strengthen long-term resilience and sustainable value generation. Building on the evolution of our mobile strategy, we continue to focus on ensure competitiveness across all mobile segments through our “3Bs” approach—Best Network, Best Service and Best Offer—while evolving our base-management model to drive higher customer lifetime value and sustainable profitability. This in cludes targeted initiatives in hyper-personalization, portfolio evolution, cross-sell and upsell, as well as improved retention and churn-control mechanisms supported by AI-enabled predictive analytics. In addition, we expect to accelerate the monetization of our customer base beyond core telecommunications by expanding an ecosystem of partnerships in areas such as streaming, gaming, fintech, health services, insurance and other adjacent verticals. We also intend to strengthen our commercial performance through differentiated content offerings, selective expansion of physical channels, reinforcement of our digital and remote-sales capabilities and continued investment in brand perception. Combined, these initiatives support our ambition to enhance the distinctiveness of our mobile value proposition, protect and grow our customer base, and unlock new avenues of profitable growth. To pursue sustainable and profitable growth in the broadband market, we are evolving our strategy to strengthen our operational fundamentals while preserving flexibility for future opportunities. Under our updated plan, we are focused on driving organic growth and improving churn performance, supported by operational enhancements, selective expansion into pockets of opportunity and the use of complementary technologies such as fixed wireless access (FWA) and satellite connectivity to extend our reach. As part of this evolution, we continue to expand our footprint, advancing end-to-end improvements in customer experience. In addition, we maintain optionality for inorganic moves, supported by recent steps such as the proposed acquisition of I-System and the ongoing evaluation of future consolidation pathways in a fragmented broadband market.These initiatives are designed to support more resilient growth, improve service quality and position the Company to capture additional value as market dynamics evolve. To shape a new trajectory of growth in the B2B market, we are evolving from a connectivity centric approach toward a broader technology driven model that enables digitalization, intelligence and data based value creation across multiple industries. Leveraging our nationwide reliable connectivity, we are expanding IoT solutions, real time data capabilities, intelligent and secure automation, edge processing and industry specific AI models to support modernization across sectors. All this while we pave the way for the future, developing the next wave of capabilities to make operations increasingly intelligent and generate value with data and AI. This includes the evolution of industry specific AI models, real time decisioning architectures, autonomous and AI enabled processes, and advanced data driven automation designed to unlock new productivity frontiers. The acquisition of V8.Tech accelerates this trajectory by strengthening our expertise in cloud native digital engineering, computer vision, intelligent automation, and AI driven business applications, supporting the long term shift toward a more intelligent, data centric enterprise landscape. We are accelerating the adoption of artificial intelligence across the Company, positioning AI as a transformative capability and a strategic imperative embedded in our operating model. Building on our initial focus on efficiency and agility, we are expanding the scope, scale and sophistication of AI use cases to support end-to-end value creation across networks, customer operations and support functions. Under our updated plan, AI becomes a foundational element of how we operate—guiding priorities, decision-making processes and execution throughout the organization as we advance toward an AI-First model. We are strengthening our core business to generate cash flow to sustain new avenues of growth and increase shareholder remuneration. We believe that this unique combination of elements, with ESG agenda embedded in our business strategy, will result in the best value proposition for the investor community. In an effort to generate high value for shareholders and also finance our best value proposition to clients, we have focused on efficiency leadership. We have one of the highest EBITDA margin in the sector in LATAM and we will keep working on improving our operating free cash flow. Our Opex-efficiency agenda includes the digitalization and expansion of AI adoption across the Company, organizational simplification, make-or-buy initiatives and continued cost-discipline measures. In parallel, we are advancing lease optimization through the renegotiation of tower contracts, the expansion of RAN-sharing initiatives and targeted efforts to optimize tower-space utilization. On the Capex front, we are scaling the implementation of AI within the network domain, accelerating the transition to next-generation infrastructure, including selective 5G offload, and reinforcing overall network-efficiency measures. Additionally, we are improving working-capital management by renegotiating payment terms, strengthening accounts-payable processes and enhancing inventory controls. Strategic Alignment and Cultural Evolution To align our business strategy with the interests of our employees and to culturally ensure our leadership focus, in 2023 we carried out a cultural diagnosis study, based on an internationally recognized methodology. The objective of this study was mapping existing values in our current culture and our desired culture values, identifying opportunities for its evolution and providing appropriate behaviors and a favorable environment to achieve the expected results. This study generated a communication plan to our team focusing on ensuring simplification and understanding the strategy's priorities, bringing awareness and commitment through the launch of the internal campaign named “Identity 101” which was based on 3 pillars: “Customer First”, “Zero Barrier” and “You, Protagonist.” As part of our cultural evolution, leaders were once again brought to commit to a set of cultural values that would guide our behavior and decision-making process, on a day-by-day basis, contributing to the achievement of business results. The values are: “Surprise the Customer”, “Be Protagonist”, “Overcome Barriers”, “Build Trust”, “Promote Inclusion” and “Think Big.” Cultural values were connected to our performance evaluation process, corporate climate survey and also to other people management initiatives. Protecting the value of our prepaid customer base and aiming at the growing of postpaid, shifting focus from absolute market share to revenue share, and strengthening our existing customer base. After two years of unusual circumstances – including in 2022, the market presenting a series of disconnections of inactive prepaid lines acquired by leading carriers from Oi Móvel’s mobile business – since 2023, the Brazilian mobile telecommunications market returned to the trend of general reduction in the number of prepaid customers seen until 2020. Such performance is reasonable, as many users have sought better value for money, migrating to control plans (postpaid) due to the increasing need for internet access. We maintained our strategy to be chosen as the single SIM provider for the prepaid consumer market by providing offers that are attractive and valuable to customers while maintaining our reputation for quality and innovation. For the prepaid consumer market, our key priority is to offer simplification to improve customer experience with continued evolution of digital channels, while for the postpaid consumer market, our plan is to grow based on a “Mobile Challenger” approach pushing migration from prepaid, leveraging the benefits of 4G coverage leadership and establishing a customer long-term relationship driven by loyalty initiatives. We are continuously improving the digital channel and sales models experience. In the business-to-business market, we intend to leverage consumer offers and channels to gain market share in the small and medium businesses, or SMB. We are also pursuing the development of targeted markets such as the IoT, and the machine-to-machine market, or M2M, beyond simple connectivity, and evaluating business opportunities for the application, using the 5G network. Moreover, we are improving our sales channel strategy to increase not only efficiency but also sales productivity. Our growth strategy is mainly focused on addressing the potential for mobile Internet in the Brazilian market, particularly increasing mobile Internet penetration and data traffic. We believe mobile operators are in a strong position to address the demand for broadband in Brazil, with the ability to provide flexible price plans affordable to most of the Brazilian population. The lack of fixed infrastructure is still an issue for accessibility to fixed broadband, especially in suburban areas, making mobile coverage more suitable for such customers without broadband access. In addition to providing affordability and coverage advantages, mobile operators appeal to the new cultural demand for Internet connectivity at all times and in all places. In addition, our strategy also involves positioning ourselves as a partner of our existing customer base, by increasing their loyalty by offering exclusive products to existing customers, focusing on value-added services in our offers, and by differentiation in our products and services. Value-added services represent an important part of our strategy, as it is already a relevant market and has high growth rates with the potential to increase revenue streams. Such services are generally launched through a partnership with an established OTT player. We believe the foregoing strategies will allow us to strengthen customer loyalty without requiring us to incur higher costs, as increased traffic within our own network does not significantly increase our operational costs. We are also investing in new channels, to bring new customers to us and to enhance each customer’s experience. We are constantly seeking new customers through new marketing efforts and promotional initiatives. Another important growth factor is expected to come from our digital strategy evolution, with an increased role in the growing M2M and IoT ecosystem, exploring new revenues opportunities including being more than just a connectivity provider, offering a platform (analytics, big data, mobile advertising, etc.) and a content offer aggregation to support mobile and fixed service revenue growth. Capitalizing fixed-mobile substitution in voice and traditional services. We seek to capitalize on the existing opportunity of fixed-mobile substitution in voice and data traffic and encourage the use of mobile devices, rather than landlines, for long distance communication and Internet. We believe that the main advantage of our product offerings is that our customers can use our growing mobile network. Providing affordable Internet access Mobile network technology has created a business opportunity for CSPs to offer more affordable connectivity services to individuals, which brings benefits for both customers and the mobile operator. We are offering our prepaid and postpaid customers competitive data usage plans through wireless handsets or other data devices (e.g., tablets, wearables, etc.). We believe that our telecommunications activities generate positive impact beyond our business. Access to mobile telephony and broadband internet services allows not only communication, but also creates countless opportunities for people and companies, functioning as a powerful tool for innovation. This transformation also enables digital inclusion through the provision of connectivity to regions without access to these resources, such as isolated communities, rural locations and low-income areas. Our focus on increased data usage among our customers is also influenced by our ability to effectively manage our handset and accessories sales, with a focus on entry level 5G smartphone models, providing quality Internet access. This approach allows us to offer our services at a highly competitive price, offer convenient payment methods, meet market demand and allow for opportunities for innovation. The result of this strategy can be seen in the increase in our number of data users and in smartphone penetration, especially in 5G. Leading mobile Internet growth in our sector is a key pillar of our strategy, since we see this as the most important market in terms of growth and size in the foreseeable future. Our marketing efforts have also been designed to stimulate Internet usage and leverage our 4G and 5G networks by providing for suitable and affordable postpaid and prepaid Internet plans. Construction of a unique infrastructure network in the Brazilian market and improving our network We are committed to developing a robust network infrastructure capable of serving our customer base and anticipating new trends and technologies in the industry. The development of this infrastructure requires both organic (planning and infrastructure development projects for the existing network) and inorganic (acquisitions) investments. As part of our strategy to focus our investments on infrastructure, TIM Participações acquired Intelig (now known as TIM S.A.) in December 2009, in order to establish our own fiber optic network and develop automation projects. TIM Participações also acquired the company formerly known as AES Atimus (later TIM Fiber, which was merged into TIM Celular in 2012, and TIM Celular was merged into us in 2018) in 2011 to strengthen and expand our fiber optic network and in 2022, we acquired Oi Móvel’s mobile assets (together with Vivo and Claro) to improve our market position, capturing better economies of scale, synergies and optimizing investments, and also our operational efficiency, aiming to offer better UX for our customers. We provide 4G technology in 100% of Brazilian cities since the end of 2023, which positions our brand as the market leader in terms of 4G coverage. In 2024, TIM launched a project to expand 4G coverage across Brazilian highways and began developing partnerships with highways concessionaires. In 2025, the company surpassed 10,000 kilometers of covered highways in Brazil. During 2025, TIM enhanced its network capacity in São Paulo, Brazil’s largest state, by 40% through the most significant mobile network modernization in its history—one of the most comprehensive initiatives ever undertaken in the Brazilian telecommunications sector. This strategic investment strengthens TIM’s competitive positioning and quality service, directly benefiting approximately 10 million customers and supporting long-term growth. We have secured a premier position in mobile network quality by leveraging our superior spectrum capacity and advanced 5G coverage. We have been repeatedly nominated by OpenSignal, as the telecommunications company with the best Brazilian Network Consistency Quality Index. In January 2026, we achieved this award for the fourth consecutive time — leading by more than four percentage points over the second-placed operator. This recognition also reflects our top performance in both the overall Video Experience and Live Video Experience awards. In addition, we harness advanced 5G to reshape our market positioning and perception, delivering high-end customer experience to our clients with a 5G rollout strategy that put ourselves ahead of other operators in terms of number of municipalities covered with 5G technology, covering more than 1,000 Brazilian cities with our fifth-generation network, bringing 5G to over 70% of Brazil's population by the end of 2025, consolidating our position in faster and lower-latency 5G technology. Since 2020, we have been developing an innovative customer platform strategy that aims to monetize our customer base. Strategic partnerships, together with Mobile Advertising, yielded revenues of approximately R$162 million in 2023, R$219 million in 2024 and R$129 million in 2025. To reinforce our long-term strategy focused on the B2B market, in January 2026, we concluded the acquisition of 100% of the share capital of V8 Consulting S.A. (“V8.Tech, a technology company specialized in digital solutions integration, cloud services and managed services. The integration of V8.Tech’s cloud and digital service capabilities into our portfolio is expected to enhance our capacity to deliver end-to-end technology solutions, supported by highly specialized teams recognized for their industry expertise and technical know-how. This combination reinforces our intention to broaden our value proposition in higher-growth enterprise segments and to support corporate clients through advanced digitalization initiatives. Significant AI adoption across core domains—including network operations and customer care—to reduce total cost of ownership, in collaboration with leading partners such as Google and Microsoft We are accelerating the implementation of AI across our areas that are focused on efficiency and agility, taking this as strategic subject. We expect these efforts to deliver significant results, not only in operational performance but also in enhancing customer experiences. Our approach is comprehensive, impacting areas such as customer care, sales, marketing campaigns, self-service, and self-healing capabilities, through all digital channels available in a coordinated and data/context unique integrated approach. Sales and Marketing Strategy Our recent sales and marketing strategy has been characterized by: · focus on strengthening our positioning with high-value customers by offering integrated service propositions that go beyond traditional voice and data plans, including access to selected digital applications, such as video-streaming services, and more competitive pricing for flagship devices. Our approach to this business line is driven by a strategy focused on increasing customer value and expanding access to premium devices at attractive price points. In this context, in 2025, we inaugurated our concept store, Flagship Oscar Freire, designed to reinforce our brand positioning among high-value customers. The store offers an interactive retail environment that showcases our portfolio of services and products and is intended to enhance customer engagement and brand experience, particularly among opinion leaders and high-value consumers; · strengthening our strategy in respect of the migration of customers away from the prepaid, by focusing on recurrent offers instead of daily offers and therefore boosting consumption; · a continuous evolution of our postpaid plans, within which we are pursuing a number of strategies, including: (i) a review of our offers in order to stimulate the sales of postpaid plans, with discounts in services and handsets, according to the commitment of the customers; (ii) add value, including value-added services as part of our plans, without extra charges; (iii) creating new markets for postpaid plans, according to our customers’ usage profile; (iv) creating new opportunities for transitioning the higher spending prepaid and TIM Controle customers to postpaid; (v) creating customizable plans for streaming subscription by the postpaid customers; and (vi) launching 5G dedicated offers to monetize our investment in 5G, providing additional data allowances and exclusive contents to our high end customers; · an effort to maintain our position as an innovator by relaunching TIM Black Família, as the first mobile plan in Brazil with flexible bundle for streaming subscription where the customer can choose between premium streaming services in their plan. The portfolio also includes the following on all family plans: large data packages to share with up to six lines, data rollover, international roaming (including data package for use in the American continent, seven days of unlimited WhatsApp and 30 minutes of voice) and a new app experience with many new functionalities, such as Internet control and self-care provisioning, which allows the owner of the contract to share Internet with the other lines through the app. In addition, the TIM Black portfolio has benefits like data rollover and international roaming (data package for use in the American continent); · exclusive and distinctive partnerships with major digital brands to boost loyalty and monetization. We have launched exclusive deals with Netflix, HBO, YouTube, Disney, Apple and Amazon throughout the last few years. In 2025, we maintained a partnership with Apple to bundle its Apple One services offers with distinctive deal on iPhones. This strategy has proven to be highly successful given the rapid increase in our high-value, postpaid customer base; · a monetization process in respect of our postpaid customer base, leveraging ARPU, via a “more for more” strategy and end-to-end product offerings which result in higher revenue generation; · enhance customer retention and value in the postpaid by launching TIM Mais Program, an exclusive, high premium loyalty initiative provides daily rewards, such as cinema tickets, food and mobility vouchers, and sweepstakes, along with access to premier experiences, including Rock in Rio, Lady Gaga and Formula 1; and · strengthening and expanding our fixed internet service. TIM UltraFibra offers high quality ultra-broadband, with high-speed data connection. To navigate our way through new markets, we, through partnership with I-Systems and others, have accelerated our footprint expansion, FTTH network coverage and continued to grow, prioritizing the consolidation of already active clusters. We ended 2025 with growth of 54% year-over-year of total homes passed (HPs) with fiber, operating in 302 cities, and with an ARPU increasing by 1.9% when compared to 2024. TIM UltraFibra ended 2025 with 850 thousand connections, increasing the FTTH base by 60 thousand accesses (a increase of 7.6% year-over-year), maintaining its growth trajectory, with the FTTH base as the main lever. Higher value plans, with speed 400 Mbps or above, continue to gain more relevance, reaching 90% of the total base on December 31, 2025. We intend to continue expanding TIM UltraFibra services through the Neutral Network model, in partnership with I-Systems and Vtal (current contracts). In the corporate business, we continue to work to increase our B2B market share, through the improvement of the Traditional mobile & ICT portfolio, added to the launch of new solutions. The expansion of B2B market will drive a wave of productivity in key industries in Brazil. By capitalizing on the expansion of IoT connectivity as a foundation, we aim to leverage a variety of solutions and services. Establishing strategic partnerships with leaders in four essential verticals - agriculture, logistics, utilities, and industry - our goal is to lead and catalyze the digital transformation in the Brazilian industry. Our commitment lies in promoting innovation and efficiency in vital sectors for the country’s economic progress. In 2025, our strategy expanded beyond these four verticals with the addition of the Internet of Vehicles (IoV) business. This new vertical strengthens our role in supporting the digital transformation of both established automotive manufacturers in Brazil and new market entrants, enabling the evolution of connected mobility and next-generation vehicle platforms. This expansion adds a critical strategic layer to our B2B ambitions, enhancing our role as a comprehensive technology partner for companies of all sizes. It also strengthens our ability to capture value in high-growth segments within Brazil’s evolving digital ecosystem, reinforcing our commitment to driving innovation, efficiency, and modernization across the country’s productive sectors. Mobile Service Rates and Plans ANATEL regulations require mobile telecommunications providers to offer service to all individuals regardless of income level. We recommend service plans that are suitable to each potential customer’s needs and credit history, such as our prepaid service plans described below. If a customer fails to make timely payment, services can be interrupted. See “—Billing and Collection.” We offer mobile services under a variety of rate plans to meet the needs of different customer classification, including our corporate customers. The rate plans are either postpaid, where the customer is billed monthly for the previous month, or prepaid, where the customer pays in advance for a specified volume of use over a specified period. Our postpaid plans include the following charges: · monthly subscription charges, which usually include voice, data and digital contents, that are included in the monthly service charge; · usage charges, for usage in excess of the specified number of minutes included in the monthly subscription charge; and · additional charges, including charges for value-added services and data services. Some postpaid plans are designed for high- and moderate- usage subscribers, who are typically willing to pay higher monthly fees in exchange for more benefits like partnerships, roaming and discounts on device prices. We also offer customized services to our corporate clients, which may include local call rates between employees wherever located in Brazil. We offer a single prepaid plan with promotional offerings, which does not include monthly charges. Prepaid customers can purchase a prepaid credits plan that may be used for calls, data and additional services, based on the specific customer’s needs. We have agreements with large national retail store chains, in addition to partnerships with regional retail store chains, to offer recharging online. Customers can also recharge straight from their mobile handsets using credit cards on our app Meu TIM and their bank app Consumer Plans In 2025, we continued to improve our positioning towards high value consumers, offering a variety of plans bundling voice, data packages, roaming to Latin America, Europe and World (in accordance with the signed plan) and free access to certain applications, as well as digital value-added services (i.e. music, e-reading and video streaming). The approach to this business is driven by the strategy of adding value for the customer base and ensuring users a premium custom experience. Within the consumer business, our main plans include: Prepaid Plans · TIM Pré XIP: Offerings launched during 2024 were built to provide a full experience with simplicity, by adapting consumption according to balance and recharge; boosting benefits (unlimited network calls, unlimited calls for other carries using code 41, adaptable data packages and SMS). We expanded the offer benefits by including WhatsApp in any recharge value and a progressive cashback through PIX, while at the same time creating incentive to digitalization through Meu TIM app. · TIM Beta: With an exclusive feel, this plan focused on young and digital customers that can only enter by invitation send by existing members or participating in a journey and accomplishing tasks to conquer their own invite. Currently, TIM Beta is only offered as a monthly subscription that includes Deezer Premium and exclusive data packages for YouTube, Netflix, TikTok and Instagram. Postpaid Plans In the higher value postpaid, we have maintained our position in the market as an innovator and disruptor with our new TIM Black Família and TIM Black plans improving our portfolio by offering large, shared data packages with monthly video streaming subscriptions. TIM Black Família plans start at R$209.99 for an entry level plan with unlimited off-network calls, 80 Gb shared data package (for one main line and one dependent), and 10Gb data for OTT applications such as Facebook, Instagram and others. The main offer is set at R$304.99 (for one main line and three dependents) with unlimited off-network calls, 120 Gb shared data package, Netflix, HBO GO, YouTube Premium, Disney + or Paramount monthly fee included, and 10Gb data for OTT applications such as Facebook, Instagram, data rollover, international roaming and others. TIM Black plans start at R$119.99 for an entry level plan with unlimited off-network calls, 40Gb data package (for one main line), and 10Gb data for OTT applications, such as Facebook, Instagram and others. The main offer is set at R$149.99 (for one main line) with unlimited off-network calls, 60 Gb data package, data rollover and international roaming (data package for use in the American continent) and other benefits like 10Gb data for OTT applications and value-added services such as music, e-books and magazines. Control Plans Our Control plans (“TIM Controle”) are a hybrid between our prepaid and postpaid plans, with fixed price billed to the customer monthly, either via credit card or digital account. Once customers of TIM Controle have reached the limit of their data plan, the data transmission is no longer available and the user has two options: (i) to repurchase a data package or upgrade to higher tariff plan; or (ii) to wait for the next data period to commence, which varies by plan, at which point his data availability and usage limit are renewed in full. Postpaid customers can also purchase a data package to navigate in full speed, but the usage is not blocked when they reach the limit of the data package. TIM Controle plans start at R$57.99 with unlimited calls and 15 Gb Internet. The main offer in the TIM Controle portfolio (which has a commercial focus) is set at R$69.99 with unlimited calls, 20 Gb Internet and 5G for OTT applications. Our control plans offer premium partnership benefits with the major entertainment brands in streaming: Amazon, Paramount, Netflix, Disney, etc. It was a pioneering move, and we were the first carrier to offer such benefits for the control customers. Corporate Plans The strategy in mobile & ICT market is to strengthen our core business by evolving the traditional fixed and mobile portfolio both voice and data, while capturing new opportunities with new solutions segments, reinforcing our position as a significant player among large companies. We continue to evolve our value-added solutions to meet the broader needs of our premium customers. Since 2018, our focus in the IoT sector, particularly in the agribusiness industry, involved bridging the connectivity gap in rural Brazil. In 2020, we solidified our leadership in agribusiness industry and expanded projects across various verticals, emphasizing connectivity as our core strength. Our strategy includes providing complete solutions through partnerships, enhancing value, driving revenue, and fostering loyalty. We are developing a new network model offering private 4G and 5G networks for industrial segments like mining, transport, healthcare, public safety, and industry 4.0. As a founding member of ConectarAGRO, we collaborate with key players in agriculture, extending connectivity to all rural areas and transforming lives. In 2022, our IoT presence expanded beyond agribusiness, entering logistics, public safety, and mining. We ventured into the 5G private network and edge computing solutions with notable deals, including the first 5G port operation in Latin America at the port of Santos, São Paulo. Our strategy revolves around connectivity, comprehensive solutions, and partnerships, delivering added value, revenue, and customer loyalty. In 2023, alongside implementing these networks, we intensified efforts to expand connectivity in the logistics sector, covering major highways in southeast and central Brazil. In a pioneering initiative, we forged partnerships with major private highways concessionaires (e.g., CCR and ECORODOVIAS). Going beyond the connectivity, we developed street lighting projects in some of Brazil’s major cities such as Curitiba and Porto Alegre. In 2024, we introduced TIM IoT Solutions, which marks a significant step in reinforcing our expertise to drive the digital transformation of Brazilian industries. Positioned as a key enabler of new business opportunities through the IoT, we are focused on key sectors such as agribusiness, utilities, logistics, and industry 4.0. Translating into numbers, these initiatives represent more than 5,600 km of highways covered. Over 220,000 functioning streetlights, with more than 340,000 sold in several municipalities. Reinforcing our leadership in agribusiness, we surpassed the mark of 19.7 million hectares covered with 4G. In 2025, we strengthened our position as a leading force in the digital transformation of rural areas, highways, and Brazilian cities, expanding connectivity to previously underserved regions and enabling significant gains in productivity, efficiency, and social impact. In agribusiness, NB-IoT coverage grew more than 25%, while 4G coverage for rural IoT reached 26.2 million hectares, advancing over 32% and reinforcing our role in automation and operational intelligence across the sector. In logistics, we expanded coverage to 10,259 kilometers of highways — an 83% increase — enabling advanced tracking, telemetry, and safety solutions. From a socioenvironmental perspective, we connected 2.6 million people in rural areas, expanded service to more than 53,000 farms, and recorded a 38.7% increase in smart public lighting, totaling 472,000 installed points, demonstrating how our IoT infrastructure accelerates development in historically underserved regions. In an unprecedented initiative, we signed the Rural Connectivity Program with the Government of Paraná, designed to accelerate network deployment in remote areas through an innovative financing model that converts ICMS tax credits into direct infrastructure investment. We were the first operator to join the program, allocating R$22 million to deploy 116 antennas across 83 municipalities, expanding coverage to approximately 40,000 people directly and more than 2 million indirectly. This model reduces investment barriers, accelerates socioeconomic benefits, and reinforces our leadership position in rural connectivity. Value-Added Services We constantly seek to increase value to our customers through innovative offers and products. We offer, directly or through agreements with third parties, value-added services in varied categories, such as education, music, reading, games, videos and social networks. Since 2022, the company has enhanced its value proposition through a series of innovative bundled offerings enabled by strategic partnerships. It began by introducing free Amazon Prime Video access to prepaid customers, driving a significant increase in spending among users of the service. Building on this foundation, the company expanded its portfolio by incorporating Apple One into its premium family plans and later enriched its offerings by enabling customers to select benefits from leading global streaming platforms through a flexible, choice-based bundle structure. In 2025, we prioritized revenue growth through the expansion of standalone entertainment services. Throughout the year, we strengthened our portfolio and accelerated commercial initiatives focused on meeting the increasing demand for flexible, high-value digital content. As a result, revenue from standalone entertainment streaming services grew by 81% year over year, reaffirming our ability to capture emerging market opportunities and enhance our digital services ecosystem. Digital Channels Since 2022, we have continued to expand our digital channels and insurance services, which were relaunched in 2018 with a broader portfolio, enabling a more comprehensive approach to this market. During this period, we introduced new digital customer service channels designed to enhance convenience and reduce reliance on traditional call-center interactions. We continued to deploy DialMyApp, a tool that displays a visual interactive voice response (“IVR”) interface on customers’ smartphones when they contact our call center from Android devices, allowing issues to be resolved directly on the device without navigating conventional voice menus. We achieved the highest level of customer engagement on this platform among Brazilian telecommunications operators. We also expanded the use of Rich Communication Services (“RCS”), a platform developed by Google that enables customer interactions through visual and interactive messaging formats with a more efficient cost structure. We were the first telecommunications operator in Brazil to launch customer service through RCS. In parallel, we initiated the internalization of pre-paid and post-paid migration processes under the oversight of a board dedicated exclusively to digital and remote channels, which was established in 2021. In 2023, our primary objectives included increasing the share of proprietary channels, advancing the internalization of e-commerce operations and redesigning the MEU TIM application to enhance customer experience, expand the user base and improve the digital journey. In 2024, we implemented the second phase of this transformation, introducing new features related to activation, portability and eSIM processes and fully eliminating dependence on external vendors. During the same year, we completed the redevelopment of the MEU TIM application and concluded the initial phase of bringing e-commerce systems and operations in-house. This transition contributed to record digital sales performance and a significant increase in unassisted sales channels. Our ongoing focus has been on optimizing the customer journey by improving conversion rates, equalizing digital services across channels, delivering a more integrated omnichannel experience and reducing the operating costs associated with human-assisted services. We have also advanced initiatives to consolidate text-based service channels through a unified chat platform and to centralize communication tools, such as WhatsApp and chatbots, into a single application. In addition, we have enhanced personalization on our website to facilitate customer interaction and route leads more effectively across channels. In 2024, we began prioritizing digital sales initiatives such as abandoned-cart recovery and receptive sales, aimed at re-engaging customers who demonstrated interest in our products but did not complete a purchase. In 2025, we further consolidated the expansion of digital channels within the B2C Mobile Sales market, which is responsible for e-commerce and remote sales strategies, increasing the use of artificial intelligence and improving customer relationship management across areas such as retention and billing. During 2025, our e-commerce platform delivered new features focused on customer acquisition through number portability and new subscriptions, including the use of SIM and eSIM activation portals for post-paid plan sales, resulting in approximately 15,000 additional post-paid plans sold per month. Customer Service In order to serve our customer base of almost 62 million customers, we aligned the insourced/outsourced service operations with the best practices of the Brazilian telecommunications business. We operate through 23 inbound call centers, of which five sites are specialized partners in customer service, focusing on high-value customer service, core processes and critical “referral channels.” As of December 31, 2025, we had approximately 12,000 points of sale premium stores and resellers (exclusive or multi-brand), in addition to established partnerships with major retail chains. This number includes 166 company-owned stores. Beyond these physical stores, our customers have access to prepaid services through supermarkets, newsstands, and other small retailers, totaling more than 160,000 points across Brazil. Since 2021, TIM has been enhancing its store models with the goal of offering even more services to our customers combining experience and innovation through spaces where it is possible to try out smartphones, accessories, and connected-home devices, along with the TIM UltraFibra experience. Since then, we opened stores in the "concept" and "future" segments, ensuring our plan to modernize our network reach. As a highlight of a new segmentation, we launched a new store model TIM’s flagship store on Oscar Freire in São Paulo was designed to be an innovative space that transforms each visit into a unique experience, bringing together technology, music, and creativity in a modern and interactive environment. With this new segmentation approach, the channel begins to generate greater value, strengthening customer relationships and increasing profitability among higher-potential clients. In 2025, we reached the milestone of 166 company-owned stores and 699 commercial partner stores. In 2025 for the corporate market, we s closed the year with 252 business partners serving small and medium-size companies In 2025, TIM reaffirmed its commitment to ESG by implementing initiatives that promote inclusion, diversity, and accessibility in its consumer service channels. To broaden income-generating opportunities for independent entrepreneurs, in 2025 TIM officially announced the relaunch of the TIM+ Vendas app, a digital platform that enables the resale of SIM cards and top-ups in a simple, secure, and fully digital way. With a modern and intuitive interface, users can place online orders, make payments via Pix or bank slip, and receive products directly at home. This initiative reinforces TIM’s strategy of democratizing access to telecommunications while promoting financial inclusion and economic growth. We conducted the maintenance of the project "Caminho Delas", safe spaces in stores for women at risk, providing access to the geolocation service via application Positive Women and guaranteed during the year 2025 the 1st place in the ASA indicator of Accessibility in Stores of ANATELSince 2020, digital channels have been a core component of our service strategy through the MEU TIM mobile application and the MEU TIM web portal. These channels support self-service functionalities, prepaid recharges and the upselling of additional services. In addition to enhancing customer experience through faster response and resolution capabilities, digital channels have enabled cost reductions in areas such as customer service operations and sales commissions. In 2025, we advanced this strategy with the launch of a new MEU TIM customer service portal, which fully integrated the mobile application and web environments into a single, unified platform. This integration was designed to deliver a consistent and seamless customer experience across channels and resulted in improvements in usability, journey continuity and issue resolution, while also positively impacting key business indicators, including digital engagement, self-service adoption, operational efficiency and revenue generation through digital channels. During 2024 and 2025, we also significantly enhanced our text-based customer service channels by modernizing platforms and expanding interaction capabilities. These initiatives included the enhancement and scaling of CHAT MEU TIM, available through both web and mobile environments, as well as the expansion of service interactions through WhatsApp, allowing customers to engage with us through the channels best suited to their preferences and needs. These developments extended beyond the introduction of additional channels and focused on improved orchestration, usability and end-to-end resolution capabilities. As a result, text-based interactions became more effective and resolutive, contributing to higher customer satisfaction while supporting key operational objectives, including higher digital resolution rates, reduced reliance on assisted service channels and increased operational efficiency. Since 2021, we have been working to keep our “customer experience” foundational pillar as a focus (see “—Our Strategy”), creating initiatives that seek to put the customer as the center of decision-making. The approach used to promote this cultural transformation was guided by the relationship between customers and employees. We have evaluated and taken action to improve the experience and professional development of our employees, with educational projects to promote engagement and insight, focused not only on technical, functional or soft skills competences, but also on the new capabilities required to reach industrial and business goals. These efforts strengthened the bonds between an employee’s business functions and the products and services they deliver to the customer. The impact was noticeable in our organizational climate survey, a study performed by consulting company mercer, considering several companies in Brazil and the global telecom market, in which our employees’ performance with respect to “quality and customer focus” remained consistent and stable at 88% in 2025. The business area supporting these initiatives was divided into three sections: design, execution and monitoring. Our design team created a policy with “customer experience” guidelines. This document defined expected behaviors and patterns in communication and interactions with customers, outlined a monitoring model, as well as refactored the products and services development cycles, to better cover all elements of customer experience. the execution area sought to solve legacy issues, with many of them concluded, which represented the efforts in the customer experience governance plan. These actions were grouped on four strategic pillars: · Customer Centric: being customer oriented, understanding their needs, the relationship and the value proposition the customer expects when interacting with us; · User Experience: understand the perceptions and reactions of our customers, including their emotions, beliefs, preferences, physical and psychological responses, as well their behaviors before, during and after they use our products, offers and services; · Customer Monitoring: making use of tools and techniques such as big data and predictive analytics to extract value from customer information, and to identify opportunities in revenue increase, reduced costs and improved quality; and · Crew Experience: with the understanding that our employees are key to create great customer experiences, empower our employees so that it is clear we are a consumer-oriented organization. In addition, we continued to use the so-called net promoter score (“NPS”) as key performance indicator to assess customer experience and advocacy across specific customer journeys, as well as overall customer perception of our services. We have also sought to maximize customer satisfaction through improvements in our processes and systems, including customer journey mapping, where employees are invited to assume the customer perspective using empathy maps and design thinking tools. The goal of using these methods is to reduce customer effort, increase customer success and to ensure positive emotions towards our brand. In this context, our ombudsman function has expanded beyond its original role of representing the company before official consumer protection authorities and handling escalations from other service channels. The ombudsman now plays a strategic role in governance and in driving initiatives aimed at improving customer experience. Reporting directly to the chief executive officer, the ombudsman is responsible for conducting market research, monitoring customer satisfaction indicators and generating insights to support best practices. The ombudsman also reinforces our customer-care culture by operating as an independent accountability channel and supporting continuous improvement. Through analytical methodologies, the ombudsman contributes to the prevention of recurring issues by mapping customer behaviors, profiles and key drivers of contact across the ombudsman function and other second-level channels, including ANATEL, PROCON and similar authorities. By analyzing customer journeys and interaction histories, the ombudsman identifies root causes of complaints and provides actionable insights, enabling accountability across business units, supporting corrective actions and reducing the likelihood of similar issues affecting other customers. These activities strengthen our governance framework and contribute to improvements across products, services and the customer service chain. Customers’ Feedback We gather the feedback of our customers through multiple research and feedback mechanisms, primarily surveys, which enable us to gain deeper insights into customer journeys, needs and pain points. These insights support continuous improvements to our services and products and contribute to clear and effective communication with relevant stakeholders. Our key research initiatives include customer experience and satisfaction surveys, which monitor important performance indicators, such as the Net Promoter Score (NPS), across our customer base and, where applicable, the broader telecommunications market. We also conduct brand image and communication surveys, as well as studies focused on the attractiveness and usability of our services and products, to better align our offerings with customer needs and expectations. We view each customer interaction as an opportunity to create additional value by offering new or more suitable services, refining personalized offerings and continuously improving customer experience across our touchpoints. Through this approach, we seek to support customer satisfaction, informed innovation and sustainable business growth. Lines of Revenue Our revenues from mobile and fixed services include: (i) monthly subscription charges, (ii) network usage charges for local mobile calls, (iii) roaming fees, (iv) interconnection charges, (v) national and international long-distance calls, (vi) value-added services, and (vii) co-billing. Additionally, we have revenues from sales of products (mobile handsets and accessories), (viii) IoT solutions setup fee (ix) IoT monthly subscription charges and other customer platform related revenues. Monthly Subscription Charges We receive a monthly subscription fee under our postpaid mobile plans, which varies based on the usage limits under the relevant plan. Network Usage Charges ANATEL has defined that each National Code (CN) represents a home registration area. Calls within the same home registration area are considered local calls. Each of our customers is registered as a user of one of our home registration areas. · VC1 (local rate): The VC1 rate is our base rate per minute and applies to mobile/fixed or mobile/mobile calls made by a customer located in the customer’s home registration area to a person registered in the same home registration area. · VU-M: The VU-M, also known as an interconnection rate for mobile phones or mobile termination rate, is the fee another telecommunications service provider pays for the mobile companies for the use of their network. See “—Interconnection Charges.” As determined by ANATEL (Act No. 3246/2023), VU-M values are as follows: Region of the GAP* Values starting in February 25, 2024 Values starting in February 25, 2025 Values starting in February 25, 2026 I R$ 0.01472 R$ 0.01503 R$ 0.01499 II R$ 0.01599 R$ 0.01650 R$ 0.01686 III R$ 0.01738 R$ 0.01779 R$ 0.01779 *General Authorization Plan (“GAP”) for Personal Mobile Service Roaming Fees We receive revenue pursuant to roaming agreements we have entered with other mobile telecommunications service providers. When a call is made from within our coverage area by a client of another mobile service provider, that service provider is charged a roaming fee for the service used, be it voice, text messaging or data, at our applicable rates. Similarly, when one of our clients makes a mobile call when that customer is outside our coverage area using the network of another service provider, we must pay the charges associated with that call to the mobile service provider in whose coverage area the call originates at the applicable rate of such mobile service provider. Automatic national roaming permits our customers to use their mobile telephones on the networks of other mobile service providers while traveling or “roaming” in the limited areas of Brazil not covered by our network, complementing our current mobile coverage. Similarly, we provide mobile telecommunications services to customers of other mobile service providers when those customers place or receive calls while in our network. Mobile service providers which are party to roaming agreements must provide service to roaming customers on the same basis that such providers provide service to their own clients. All such providers carry out a monthly reconciliation of roaming charges. Our roaming agreements have a one-year term and automatically renew for additional one-year terms, which are regulated and previously approved by ANATEL. The PGMC approved in 2025 the inclusion of Roaming EIR (within the same registration area until December, 2031). Also, was determined to impose certain conditions, such as (i) reference prices for roaming; and (ii) prohibition, for five years, of charging for M2M and IoT subscriptions (until September 2027 for us). Interconnection Charges We receive interconnection revenues for any calls originated on another service provider’s network, whether mobile or fixed line, that are received by any mobile customer, ours or of other providers, while using our network. We charge the originating service provider an interconnection fee for every minute their call uses our network. Conversely, when our users place calls to numbers connected to other operators’ networks, we must pay those operators the applicable interconnection fees. We have entered into interconnection agreements with most of the telecommunications service providers operating in Brazil. These agreements set forth, among other things, the number of interconnection points, the technical standards for the transmission and reception of signals, and the applicable costs and fees for interconnection services. All interconnection contracts must be submitted to ANATEL for approval. Nevertheless, even in the absence of ratification by ANATEL, the parties remain obligated to provide interconnection services to one another. The interconnection fees we were allowed to charge other telecommunications companies, and which other mobile telecommunications companies charge us, were historically adjusted by inflation. Transition rules were defined and applied until July 2014, as stablished by Resolution No. 639/2014. ANATEL subsequently issued the rule for the definition of reference rates for entities with significant market power, based on a cost model, for VU-M, as well as maximum rates for TU-RL. Since the issuance of Resolution No. 639/2014, interconnection fees have been decreasing based on a specific glide path, until 2019. Starting in 2020, ANATEL has determined that VU-M values will rise slightly again. Currently, Act n. 3246/2023 provides for the VU-M values, See “—Regulation of the Brazilian Telecommunications Industry—Interconnection Regulation.” Long Distance Telecommunications customers in Brazil can select long-distance carriers on a per-call basis using the carrier selection code (CSP), a mechanism introduced in July 2003. By dialing a two-digit code before dialing long-distance numbers, customers can choose their preferred carrier. However, ANATEL Resolution No. 768/2024 introduced a major restructuring of local calling areas, redefining them to coincide with each National Code (area code or DDD). As a result, all calls made between municipalities sharing the same DDD are now classified as local calls, which significantly reduces the number of calls treated as long-distance and, consequently, decreases the situations in which CSP selection is required. We continue to offer nationwide long-distance services for mobile customers, and users of other providers may still select our service through our CSP code. CSP remains applicable only to calls between different DDDs, narrowing its operational scope. Under this structure, a customer is charged VC1 rates directly by us only for calls made and completed to a number registered within that customer’s home registration area. However, long-distance calls are billed to the customer by the chosen long-distance carrier. When our customer selects another long-distance carrier, that carrier pays us a VU-M fee for any use of our network to complete the long-distance call. The reclassification of many previously long-distance calls as local calls reduces overall long-distance traffic, which may affect the volume of VU-M revenues associated with long-distance interconnection. VU-M is the fee paid to us by another telecommunications service provider for the use of our network by that provider’s customers, in this case in connection with long-distance calls. See “—Interconnection Charges.” STIR SHAKEN - STIR (Secure Telephone Identity Revisited) e SHAKEN (Signature-based Handling of Asserted information using toKENs) ANATEL has intensified its actions to combat fraudulent calling practices, including spoofing and robocalls. In recent years, ANATEL has encouraged the implementation of the STIR/SHAKEN framework and, with the publication of Acórdão No. 201/2025, made call authentication mandatory. Under this framework, the authentication requirement initially applies to “large callers,” defined as entities originating more than 500,000 calls per month, which are required to activate call-authentication mechanisms by February 2026. The objective of this measure is to mitigate spoofing and abusive calling patterns by enabling reliable validation of calling numbers. Interconnection routes between large service providers have already been configured to support STIR/SHAKEN authentication. Further implementation steps and operational requirements remain under discussion between service providers and ANATEL. Number Portability Due to the large number of small service providers, ANATEL has worked to expand the numbering range that identifies number portability and therefore enables new providers in the Brazilian market. Co-Billing Services Co-billing occurs when we bill our customers for long-distance services rendered on behalf of another service provider. Beginning in July 2003, we started providing co-billing services to other telecommunication service providers operating in Brazil. The fee to provide such service to the long-distance carrier is defined by ANATEL and the rate charged to the subscriber follows the rating plan from the long-distance carrier. Other service providers also perform co-billing for TIM when their users use TIM’s CSP 41 to place long-distance calls, remitting the revenues from those calls to TIM. IoT Solutions Setup Fee We receive a one-time fee under our IoT solutions, which varies based on the solution contracted, the number of IoT devices connected and the CAPEX invested by us on implementing the project. IoT Monthly Subscription Charges We receive a monthly subscription fee under our IoT solutions, which varies based on the solution contracted, the number and data consumption of the IoT devices and other platforms. Sales of Product We offer a diverse portfolio of handset models from several manufacturers for sale through our dealer network, which includes our own stores, exclusive franchises and authorized dealers. We are focused on offering an array of handsets, including essential and smartphones devices with enhanced functionality for value-added services, while practicing a policy of increasing 5G smartphone penetration. Our mobile handsets can be used in conjunction with either our prepaid or postpaid service plans. In 2025, we continued to expand our technological products in our own retail stores, including video game consoles, smart televisions, audio devices and other consumer electronics, supported by a more competitive pricing strategy. Billing and Collection Our company-wide, integrated billing and collection systems are provided by third-parties vendors. These systems have four main functions: (i) customer registration, (ii) customer information management, (iii) accounts receivable management and (iv) billing and collection. These billing systems give us significant flexibility in developing service plans and billing options. Certain aspects of billing customers in Brazil are regulated by ANATEL. The new user rights regulation (“RGC”) – Resolution No. 765 published in November 2023, established new rules, such as the possibility of total service suspension 15 days after the customer notification and the suspension of charges during the suspension period. The application of these new rules became effective in September 2025. In order to avoid delinquency and discontinuation of service, however, we have invested in CRM models to identify customers with a higher propensity for early delinquency and also reinforced credit history checks for our customers prior to service activation. In August 2024, we launched the new TIM invoice layout, making it easier to understand the bill and highlighting the QR code for payment. In December 2025, 68.4% of the payments made by our customers were via PIX and we achieve a 99.1% penetration of digital invoices. Pursuant to ANATEL regulations, we and other telephone service providers periodically reconcile the interconnection and roaming charges owed among us and them and settle on a net basis. See “—Lines of Revenue—Interconnection Charges” and “—Lines of Revenue—Roaming Fees.” Seasonality We have experienced a trend of generating a significantly higher number of new clients and product sales in the fourth quarter of each year as compared to the other three fiscal quarters. Several factors contribute to this trend, including the increased use of retail distribution in which sales volume increases significantly during the year-end holiday shopping season, the timing of new product and service announcements and introductions, and aggressive marketing and promotions in the fourth quarter of each year. Regional Overview We provide 4G coverage in 5,570 cities to 100% of the urban population of Brazil, making our 4G network the most extensive in the country. Lastly, 2022 was marked by the launch of 5G technology in Brazil, which seeks to meet the demand for higher connection speeds. We ended 2025 having launched 5G technology in 1,089 cities, reaching over 70% of the Brazilian population, with a much higher number of antennas than required by ANATEL, allowing us to provide an even better experience for our customers. The following table shows information regarding Brazilian mobile telecommunications, at the dates indicated. As of or For the Year Ended December 31, 2025 2024 2023 Brazilian population (millions)(1)(2) 213.4 212.5 203.1 Estimated total penetration (%)(3)(4) 126.7% 123.9 126.1 Brazilian wireless subscriber base (millions) 270.4 263.4 256.4 National percentage subscriber growth (%) 2.7 2.8 1.7 (1) According to the last information disclosed by IBGE from the preview of the population of the municipalities based on data collected by the 2022 Demographic Census (December 2022), that was reviewed in the mid of 2023. For 2024 and 2025, it is an IBGE estimate. https://www.ibge.gov.br/estatisticas/sociais/populacao/9109-projecao-da-populacao.html (2) The 2022 numbers were based on an estimate released by the IBGE and considering actual data collected in respect of 2023 and 2024, appeared to show an upward deviation which may have considered the population higher than it should have. https://informacoes.anatel.gov.br/paineis/acessos/telefonia-movel (3) Percentage of the total population of Brazil using mobile services, equating one mobile line to one subscriber (December 2022). (4) Based on information published by ANATEL. Our Network Our mobile network uses 5G, 4G, NB-IoT, 3G and 2G technologies and cover 100% of the urban Brazilian population. Between 2007 and 2014, we acquired new RF authorizations used for 3G and 4G mobile telephone services at the 2100 MHz, 2500 MHz and 700 MHz bands. In order to move toward 4G services, in October 2012, we acquired additional bandwidth in the 2,530-2,540 MHz and 2,650-2,660 MHz sub-bands, with national coverage. In September 2014, we invested approximately R$2.85 billion to acquire bandwidth in the 700 MHz range, which aligned with our strategy of expanding our broadband and 4G service across Brazil. We began providing our services in the 700MHz range in 2016. See “—Regulation of the Brazilian Telecommunications Industry—Frequencies and Spectrum Background.” In December 2015, ANATEL auctioned left over radio frequencies in the 1,800 MHz, 1,900 MHz and 2,500 MHz bands. We submitted bids for the left over lots of the 2,500 MHz band, in the 2,500-2,510 MHz and 2,620-2,630 MHz sub-bands – known as P-Band, which had originally been auctioned in 2012. This particular P-Band spectrum provides 4G mobile services. We acquired the lots for Recife, in the state of Pernambuco (Region AR 81), and Curitiba, in the state of Paraná (Region AR 41), based on our bids which totaled R$57.5 million. The corresponding authorization terms were signed in July 2016. During 2017, several municipalities throughout Brazil had their analog TV signals switched off, freeing up the bandwidths in those regions for 4G mobile services. In 2018, the analog TV switch-off schedule was completed in regions where it is necessary to clean up the 700 MHz spectrum for the LTE. Therefore, by September 2019, all municipalities were able to receive our expanded 4G coverage through the 700 MHz band. Throughout 2024, the entity created to ensure the spectrum cleanup, called the Entity for Administration of TV and RTV Channel Relocation and Digitalization Process, or EAD, was expected to be terminated after fulfilled its obligations. Nevertheless, in 2024 it was decided that EAD will develop new projects related to LTE covered expansion, television upgrade and clean up maintains. In November 2021, we invested approximately R$1.1 billion to acquire the 2.3 GHz, 3.5 GHz and 26 GHz spectrum bands, aligned with our strategy of deploying 5G technology. See “—Regulation of the Brazilian Telecommunications Industry—Frequencies and Spectrum Background” and “—Regulation of the Brazilian Telecommunications Industry—Authorizations and Concessions.” In connection with the conclusion of the Reorganization whereby TIM Celular was merged into us, see “—Item 4. Information on the Company—C. Organizational Structure,” we hold all of the authorizations previously issued in the name of other companies controlled, directly or indirectly, by TIM Participações. RF authorizations are generally valid for a period up to 20 years initially and are renewable for an additional equal period since the revision of the General Telecommunications Law in 2021, and our current authorizations started expiring in September 2022. As such, we have started requesting renewals for the same period as the authorizations reach the end of their original term (for details on spectrum licenses and expiration dates see “—Regulation of the Brazilian Telecommunications Industry—Frequencies and Spectrum Background”). In the case of authorizations that cannot be renewed, current telecommunications law sets forth that the spectrum is returned to the Brazilian Federal Government under ANATEL’s management. For this reason, revisions to General Telecommunications Law have had a meaningful impact in the sector, generating an environment possibly more conducive to long-term investments. As a result of our investment in infrastructure, in March 2022 we announced that we had completed our implementation of the standalone 5G network CORE. This was necessary for us to be able to provide fifth-generation services in accordance with government requirements. ANATEL approved a revised schedule for granting access to the 3.5 GHz spectrum band in order to activate the 5G network in the Brazilian capital and Federal District of Brasília after August 2022, commencing the commercial operations of 5G SA throughout Brazil. In 2022, we began the rollout and now have 5G coverage in Brasília and all 26 state capitals reaching a total 1,089 cities at the end of 2025, with a special focus on the cities of São Paulo, Rio de Janeiro, Curitiba, Recife, Salvador, Brasília e Fortaleza, where 100% of the neighborhoods were covered, allowing traffic growth through a new, faster and more efficient access network. We consider the purchase of any frequency made available by ANATEL for the provision of mobile services as a priority, since having available frequency is core to our business. In 2021, we made R$3,213 million in investments, primarily in capacity and coverage 4G, mainly using M-MIMO antennas, core functions virtualization, expansion and capacity enhancement of our optical transport networks, infrastructure resilience, quality maintenance and enabling of fiber-to-the-site and the mobile broadband MBB programs. These investments allowed us to reach, by the end of 2023, the milestone of all the 5,570 Brazilian cities with 4G coverage, or 100% of the country’s urban population. We are thus the leader in 4G coverage in Brazil among mobile telecommunications providers, both by number of cities served and percentage of population covered. On July 22, 2020, we obtained ANATEL’s approval, and, on June 3, 2020, obtained CADE’s approval for the execution of two agreements with Vivo aimed at sharing 2G, 3G and 4G mobile network infrastructure for agreed consideration, increasing the network cost efficiency through the initiatives Single Grid and 2G Switch-off. These two sharing agreements reinforce the evolution process of the Brazilian telecommunications market in terms of network infrastructure sharing. For details see “Item 4. Information on the Company—A. History and Development of the Company—Historical Background—TIM and Vivo new sharing agreement.” Our wireless network has both centralized and distributed functions, and includes mainly transmission equipment, consisting primarily of more than 6 thousand 5G gNodes, 66 thousand eNodeBs in our 4G network, more than 17 thousand NodeBs for the 3G layer and more than 13 thousand BTSs for 2G network as of December 2023, considering site-sharing, hardware equipment and software installation and upgrades. The network is connected primarily by optical fiber transmission systems and MW radios distributed nationwide. Another priority is developing our national network. In December 2023, we continued to increase the quantity of sites connected by optical fiber, as well as integrating mobile sites acquired with Oi assets, reaching more than 12,500 of sites connected by optical fiber. The results are consistent with ANATEL’s network quality requirements, and with TIM retaining its solid performance in 2022. Since national coverage and quality of service has improved substantially over the last few years, ANATEL has shifted its focus in recent years. ANATEL is now concentrating its efforts on smaller geographic areas, particularly in those areas where service is still considered poor. The AES Atimus Acquisition and consequent creation of TIM Fiber (which was merged into TIM Celular in 2012, and TIM Celular was merged into us in 2018) has improved our optical fiber (or fiber optic) network presence in more than 31 cities including the metropolitan regions of Rio de Janeiro, São Paulo, Salvador, Goiânia, Recife, Manaus, Belo Horizonte and Distrito Federal. Our optical fiber network has capacity to offer high quality ultra-broadband service, available through our TIM UltraFibra service and increase basic infrastructure to be applied in our fixed and mobile operations. In 2021, we performed a carve-out and concluded the closing of a transaction with IHS Fiber Brasil – Cessão de Infraestruturas Ltda., for the acquisition of a controlling equity interest in FiberCo Soluções de Infraestrutura S.A. (later renamed I-Systems), a company established by us for the segregation of network assets and the provision of infrastructure services, with the mission of deploying, operating, and maintaining last-mile infrastructure for broadband access with us as the anchor customer. I-Systems began its operation with approximately 15,000 km of secondary network fiber, covering approximately 6.4 million households (homes passed), with 3.5 million in FTTH and 3.4 million in FTTC. At the end of 2025, our fixed infrastructure, including remaining metropolitan infrastructure and long-distance assets, is highlighted by the following characteristics: • an extensive fiber transport network including a national backbone, regional fiber to the city and a metro network with more than 132,000 km of fiber; • 2,000 cities connected with optical fiber; and • more than 17,000 towers connected with optical fiber. Our switching exchanges and intelligent network platforms enable us to offer flexible, high quality voice service at extremely competitive prices. Our satellite network covers distant areas of the country and is being expanded and renewed to provide high private service. As a general matter, telecommunications operators’ networks have tended to be designed, deployed and managed according to a vertical architecture model referred to as “end-to-end,” where the hardware and software are proprietary and dedicated to each network function. With the growing demand for differentiated services, the need for physical space, energy and speed has become critical and, consequently, companies’ capital expenditure and operating costs have tended to increase. Such network architecture based on monolithic network elements requires a long time for development and deployment, impacting directly the time-to-market for launching new products or services and, consequently, reducing the generation of new revenues. NFV is the new architectural paradigm that aims to address infrastructural network transformation as a key step in the evolution of the implementation of new systems and network infrastructure, as it adopts the concept of consolidating standardized commercial off-the-shelf hardware elements that are available in virtual environments for shared use across various applications, accelerating the ability to deliver services, reducing costs and improving customer satisfaction. We aim to capitalize on the proposed benefits from such technology. We understand that the NFV and the sharing of resources and equipment is the way to establish an economically more efficient structure, by reducing investment and/or operational costs while also reducing the time-to-market for launching new offers (an increasingly relevant factor in a competitive scenario). By the end of 2025, we had 16 virtualized Core Network Datacenters (DCC) located in Rio de Janeiro (2), São Paulo (2), Fortaleza (2), Salvador (2), Brasília (2), Belo Horizonte (2), Belém (2) and Curitiba (2), in addition to 19 virtualized Edge Network Datacenters (DCE) located in Campinas, Porto Alegre, Natal, João Pessoa, Florianópolis, Blumenau, Maringá, Londrina, São Luis, Goiânia, Recife, Santos, São José dos Campos, Uberlândia, Varginha, Feira de Santana, Teresina, Manaus and Ponta Grossa. Most of our core network functions are already running in a virtualized fashion by means of these network datacenters. The migration of additional network functions to a virtualized datacenter will be based on a roadmap of virtual network functions, or VNFs, respecting the maturity of each network function. Similar to the movement of IT systems to public cloud infrastructure, network functions have also been planned to be migrated to the cloud, respecting their particularities regarding high availability and performance. In order to guarantee this movement, NFV architecture had an important role for the evolution of these NFs from a Virtual environment (VNF) to a cloud environment (CNF). As result of this journey, we intend to move network workloads to a hybrid cloud (on-premises and public cloud) throughout the next 3 years. We understand that cloud infrastructure is a second step (just after NFV) to establish an economically more efficient infrastructure, not only for reducing investment/costs, but also for speeding up project deployments and reducing time-to-market of new offers. Based on the efficiency and on the robustness of the technologies used in the NFV and IP networks, in virtualizing its core network, we are also optimizing capital expenditures. Therefore, our commitment to quality infrastructure and quality improvement allow us to develop projects such as: (i) unification of the functions of an intelligent network core signaling network and network data base through unified data consolidation and (ii) the evolution of security platforms such as session border controller that accomplishes IP interconnection with other operators. We expect from these and other projects to be able to reduce our operating expenditures by decreasing leased lines and infrastructure sharing, simplifying maintenance processes and architecture/topology, increasing resilience even in conditions of disaster recovery and improving the customer experience by increasing the speed in which calls are set up and data is transmitted and improve the amount of time needed to make customers profiles available in our data base. In 2014, we started to change our mobile packet core platform to a unified packet core based on the most advanced 3GPP evolved packet core standards, providing a coordinated seamless mobility management in a HetNet access environment (full multiple-access nodes for 2G/3G/4G/Femto) in order to support the huge increase in data demand in the Brazilian telecommunications market, as discussed elsewhere throughout this annual report on Form 20-F. The evolved packet core platform is also evolving to an NFV model, based on 3GPP’s control and user plane separation of EPC nodes. This enables flexible network deployment and operation, by distributed or centralized deployment and the independent scaling between control plane and user plane functions. In 2017, we started to implement our VoLTE platform following 3GPP standards, providing better voice quality and 4G service continuity, avoiding the need to resort to 2G/3G during voice calls. The VoLTE platform was implemented in an NFV model since its inception, based on 3GPP’s nodes. In 2018, we implemented a new security system to access our new and legacy platforms, called “Secure Password.” It uses a secure shell, or SSH, security protocol, monitors attempts of non-standard access and generates related warnings (IAM-Identity Access Management). This process involves password encryption and a logical safe that only grant recovery to authorized users while also granting and recording access through video and text devices. More specifically, it features: (i) password authentication with a maximum validity of 90 days; (ii) authorization through a login administration interface; and (iii) audit (logs) generated by the system, allowing the traceability of user actions from the beginning to the end of each operation. The system also sends logs to a centralized system as a historical database. Additionally, we have a plan to mitigate network risk on a macro scale that prioritizes our critical network infrastructure based on a risk map and the Network Resilience Plan. The Network Resilience Plan allows us to focus on the main issues, and these in turn become the basis for crafting short-, medium- and long-term mitigation measures to enhance the robustness of the network. In 2022, we started to implement our 5G SA Core, following 3GPP standards, providing 5G SA services for our customers, with new capabilities like reduced RTT – Round Trip Time and mission critical IoT services. The 5G core was implemented in a cloud environment (CNF). Sources and Availability of Raw Materials Our business and results of operations are not significantly affected by the availability and prices of raw materials. Site-Sharing and Other Agreements. Network Decommissioning From time to time, we are required to decommission our network equipment for various reasons, including security, compliance, cost savings, resource optimization, efficiency, and others. With a network as complex as ours, we periodically review our network requirements. In 2025, we maintained the transformation pace initiated in 2022 in our network decommissioning program. The decommissioning governance model, materialized in new projects to manage our assets within budget limits and through an effective and consistent communication channel (“RADAR 4.0”), ensured the strategy's execution. Automations and procedural improvements substantially reduced the number of service level agreements (SLAs) related to decommissioning. Additionally, we increased production capacity through new service contracts and supported the growth of the tax and accounting teams contributing to the decommissioning process. As a result, we were able to meet the strong increase in demand generated by strategic projects such as the completion of the SPE Cozani integration, the Vivo sharing agreement, the integrity control commitments, and others. as of the date of this annual report, we have a more robust structure in place, ready to meet the demand expected for 2026. Site-Sharing Agreements With the objective of avoiding unnecessary duplication of networks and infrastructure, ANATEL allows telecommunications service providers to use other providers’ networks (long distance, backhaul and spectrum frequencies, among others) as secondary support in providing telecommunications services, with a focus on reducing costs and increasing the penetration of mobile services in Brazil. Therefore, we have allowed other telecommunications service providers in our region to use our infrastructure, and we have used other providers’ infrastructure, pursuant to site-sharing agreements with such operators. Based on such ANATEL policy, in November 2012, TIM Celular (which has been merged into us in connection with the Reorganization) formalized with Oi an agreement for the reciprocal assignment of their LTE networks (4G technology) in certain cities, which was approved by ANATEL and CADE, which is the Brazilian antitrust agency and has the mission to ensure free competition in the market, not only by investigating and ultimately deciding on the competitive matter, but also by disseminating a free competition culture. In April 2014, TIM Celular (now TIM S.A.) and Oi entered into an agreement for the joint construction, implementation and reciprocal assignment of parts of their respective GSM (2G) and UMTS (3G) network infrastructures in cities with less than 30,000 inhabitants, which was also approved by ANATEL and CADE. In July 2015, TIM Celular (now TIM S.A.), Oi and Vivo entered into an agreement for the reciprocal assignment of LTE network media (4G), like the agreement between TIM Celular (now TIM S.A.) and Oi in 2012, but also covering frequencies sharing. As with the prior sharing agreements, ANATEL and CADE approved the agreement between the parties. After Oi Móvel’s bankruptcy process, in 2022, we and Vivo requested CADE’s clearance for a contract addendum, in order to continue the sharing agreement without Oi. This clearance was granted by CADE on February 13, 2023, and we are currently in the process of finalizing and executing the amendment to the agreement. Also in 2015, TIM Celular (now TIM S.A.), Vivo, Claro and Oi filed with CADE a term of commitment with the objective of negotiating the joint contracting of one or more companies to carry out the construction, installation and provision of infrastructure in indoor environments (such as shopping malls) in several locations in Brazil, which was approved without restriction by CADE. In November 2015, our predecessor entities, TIM Celular and Intelig (which subsequently merged to form TIM), and Vivo filed an agreement to share UMTS network (3G) under a multiple operation core network, RAN sharing model which includes frequency sharing in certain cities based on their rural coverage obligations, which was also approved without restrictions. In March 2018, due to the mediation process between ourselves and Oi, a new RAN sharing agreement was executed, which changed the sharing modality described in the 2012 agreement (technological evolution from the multi-operator RAN to the multi-operator care network) and included part of the 1,800 MHz radio frequency bands. CADE and ANATEL approved the operation without any restrictions. On July 23, 2019, we and Vivo entered into a memorandum of understanding (“Vivo MoU”), to start negotiations regarding: (i) sharing of single-grid 2G network; (ii) establishment of new infrastructure sharing agreements for the 4G network in 700MHz, directed to cities with fewer than 30,000 inhabitants, which in the future may be expanded to larger cities; (iii) other network sharing opportunities in other frequencies and technologies; and (iv) other opportunities in efficiency and cost reduction in operations and network maintenance. Vivo and us believe that the potential developments from the concepts set forth in the Vivo MoU would result in improved services at both carriers, as well as synergies and efficiencies in the allocation of investments and operating costs. On December 19, 2019, pursuant to the Vivo MoU with Vivo, two new sharing agreements have been entered into regarding: (i) the creation of a unique network in 2G technology; and (ii) a single-grid agreement that will result in an expansion of 3G and 4G networks and a network consolidation in small cities (with less than 30,000 inhabitants). Both agreements were approved without restrictions by CADE and ANATEL in 2020, reinforcing the evolution of the Brazilian telecommunications market in terms of network infrastructure sharing. On September 2, 2024, we and Vivo submitted to CADE and ANATEL the amendments to these sharing agreements. On October 22, 2025, CADE approved the addendum of the sharing agreement signed in December 2019; however, such addendum remains subject to approval by ANATEL. Our Operational Contractual Obligations For more information on our material contractual obligations, see “Item 10. Additional Information—C. Material Contracts.” Roaming Agreements We have entered into roaming agreements for automatic roaming services with other mobile operators outside our covered areas. Automatic roaming allows our customers to use their mobile telephones on the networks of other mobile operators while traveling abroad or out of our coverage areas in Brazil. Similarly, we provide mobile services for customers of other mobile operators when those customers place or receive calls while visiting Brazilian cities within our coverage. We provide services for the clients visiting our network on the same infrastructure basis provided to our own clients. All of the mobile operators party to these agreements must carry out a monthly reconciliation of roaming charges with its roaming partners. National Roaming Agreements In 2017, ANATEL required Claro, Oi, Vivo and us to guarantee the provision of mobile services (voice, SMS and data) in all cities with less than 30,000 inhabitants through roaming agreements. Considering that in December 2023 we started to have our own coverage in 100% of the national territory, a process was initiated to deactivate the use of roaming in other Brazilian operators. However, we continue to offer its coverage to other operators. In 2023, ANATEL started to encourage the expansion of agreements to include highways. International Roaming Agreements We have international roaming agreements available in 207 different countries with 457 international operators that encompass 595 individual (PMNs) networks. These agreements include at a minimum voice service and may be enhanced based on the technology available on the visiting network and can include voice, SMS and data (2G, 3G, 4G, 5G NSA and VoLTE). Our international roaming agreements have steadily expanded in recent years. By the end of 2025, we expanded our 5G NSA data coverage to 81 countries, covering the main travel destinations for Brazilians. In addition, we offer 4G roaming in 137 countries and established VoLTE connections in 48 countries. In November 2018, Brazil entered into a free trade agreement with Chile, which resulted in the end of international roaming charges between the two countries. On October 13, 2021, the Legislative Decree No. 33/2021, which approved the free trade with Chile, was sanctioned by the President of the Senate. With approval, the agreement would come into force on January 25, 2022, and the end of roaming charges was expected by January 25, 2023. Due to a request of the Chilean Regulator, the implementation of the Article 11.25 of the free trade agreement was postponed to July 25, 2023, when it came into force. In July 2019, Brazil entered into a free trade agreement with other Mercosur member countries providing for the elimination of international roaming charges. On September 3, 2025, Legislative Decree No. 192/25, which approved the elimination of international roaming charges for end users within Mercosur, was enacted. Although the agreement is now in force, the effective elimination of roaming charges remains subject to implementation by ANATEL. Regulation of the Brazilian Telecommunications Industry General The telecommunications sector is regulated by ANATEL, which was established by law and is administratively independent and financially autonomous from the Ministry of Communication (Ministério das Comunicações). ANATEL is responsible for reviewing and amending all administrative regulation regarding services, completion and customer’s rights related to telecommunications, issuing formal authorizations, and performing inspections, as set forth in the General Telecommunications Law and the Regulamento da Agência Nacional de Telecomunicações, or the ANATEL Decree. Despite liberalization, which occurred in 1997, the Brazilian telecommunications market still faces persistent dominant positions held by fixed incumbent operators. In particular, broadband access is currently offered by operators over their own infrastructure and the respective regulatory framework is not always based on effective implementation of the wholesale access obligations. In 1998, a presidential decree approved the first General Plan for Universalization Goals (Plano Geral de Metas de Universalização) (“PGMU”), obligations binding on the landline telephony services (Serviço Telefônico Móvel Comutado) (“STFC”), applicable only for fixed incumbents. PGMU is reviewed every 5 years, and the last universalization plan, formulated by the government, was published in January 2021 considering that fixed telephony concession will end in 2025. The PGMU V, replaces the 4G targets established in PGMU IV for construction of a backhaul in the municipalities that do not have a fiber optic connection. In 2019, PLC 79/2016 was approved and converted into Law No. 13,879. The Law entered into force on October 4, establishing a new regulatory framework for the telecommunications sector in Brazil allowing the fixed telephone concessionaires to adapt their agreements from a concession regime to an authorization regime. Based on this new regulation, in 2024, the process of Oi Móvel’s and Telefonica’s migration from concession to authorization was approved by ANATEL. (see “Item Review of the Current Regulatory Model for the Provision of Telecommunications Services”) A presidential decree issued on June 30, 2011, established a bidding process for 4G RFs, an important landmark for the telecommunications sector. The bid occurred in 2012 and, to guarantee full rural service by 2018, ANATEL linked the 4G blocks in the 2,500 MHz band to the 450MHz band in specific geographic regions of Brazil. As a result, the four winning operators of the 4G blocks in the 2,500 MHz band linked to the 450MHz band are subject to coverage commitments in rural areas. Such presidential decree also resulted in two new regulations to measure mobile and fixed broadband quality standards. Another important set of rules is the Decree No. 9,612/2018, or the Connectivity Plan, which established a series of guidelines for execution of terms of conduct adjustment, onerous granting of spectrum authorization and regulatory acts in general which includes: (i) expansion of high capacity telecommunications transport networks; (ii) increased coverage of mobile broadband access networks; and (iii) broadening the coverage of fixed broadband access network in areas with no available internet access by means of this type of infrastructure. It also establishes that the network implemented from the commitments will be subject to sharing from its entry into operation, except when there is appropriate competition in the respective relevant market. As well as Decree No. 10,480/2020 that regulates the Antennas Law (Law No. 13,116/2015) with the objective of stimulating the development of the telecommunications network infrastructure. Brazilian Federal Government In 2021 there were some important ordinances published, namely: (i) Ministry of Communications Decree No. 2,447/2021, which approved our issuance of up to R$5,753 billion in debentures; (ii) Ministry of Communications Decree No. 2,556, which set priorities and goals for the establishment of investments determined by ANATEL; (iii) Decree No. 10,748, which established the Federal Network for the Management of Cyber Incidents, regulating the National Information Security Policy, which aims to improve and coordinate the bodies and entities of the federal public administration in the prevention, treatment and response to cyber incidents; (iv) Decree No. 10,887, which provided for the organization of the National Consumer Defense System, with the objective of guaranteeing greater protection to consumer relations, increasing legal certainty, and making the administrative process more efficient; and (v) Data Protection Authority Decree No. 15, which established the Governance Committee, responsible for establishing institutional strategies and strategic guidelines related to public governance. Also, there were some relevant decrees involving 5G. They were: (i) Decree No. 10,799 which updated Decree No. 9,612/2018 (telecom public policies), allowing the Government’s network to be built by other entities, not only Telebras; (ii) Decree No. 10,800 established the Amazon Integrated and Sustainable Program (PAIS). One of its objectives is to expand telecom networks to the Amazon region, in addition to creating a management committee to monitor them, among other provisions; and (iii) Ministry of Communications Decree No. 1,924/21 about 5G guidelines, mainly about network security; obligation to provide an exclusive government network; backhaul for agribusiness; coverage of federal highways aligned with the Ministry of Infrastructure, among others. In order to use the Universal Telecom Services Fund (FUST), (i.e., the contribution that the telecom sector makes annually), Law No. 14,109/2020 was introduced authorizing the use of FUST, including by the private sector, to expand connectivity in rural or urban areas with a low human development Index (HDI) as well as policies for education and tech innovation of services in rural areas. In 2020, the Decree No. 10,480/2020 was published by the Brazilian Federal Government, which regulates antennas (Law No. 13,116/2015) with the purpose of stimulating the development of telecommunications network infrastructure. This decree is aimed to foster development of telecommunication network infrastructure and is a major step towards unlocking historical problems in the sector preventing its development, for example, some historical problems that the regulation seeks to cure include free right of way on highways and railways, positive silence, small cells and dig once. On June 15, 2021, Provisional Measure No. 1,018/2020 was transformed into Law No. 14,173/2021, reducing the charges for satellite internet terrestrial stations and changing some of the FUST application rules. The law reduces FUST collection between 2022 and 2026 for telecommunications operators that run universalization programs approved by the management council (yet to be approved) with their own resources. The benefit will be valid for five years from 1 January 2022 and will be progressive: 10% in the first year; 25% in the second year; 40% in the third year; and 50% from the fourth year onwards. In addition, the new legislation removes the obligation to share towers within less than 500 meters from each other. The withdrawal of this obligation was considered essential for the implementation of 5G in Brazil, including to allow for the expected increase in density for the new technology. However, in 2024, the Brazilian Supreme Court reinstated the effects of the regulation requiring telecommunications companies to share transmission towers in the context of the Direct Action of Unconstitutionality (ADI) 7708, which is still ongoing. In 2022, Decree No. 10.952/2022 was published, establishing the transfer of R$3.5 billion of FUST collection for connectivity of students and teachers of basic public education and data provided by INEP as criteria for transferring resources. The decree also stipulates that the resources may be used for a fixed connection, provided that cost-effectiveness is proven or that there is no offer of mobile data in the location where the beneficiary students live. In March 2022 Decree No. 11,004/2022 was published, which defines how the Fund will be operationalized and foresees how the resources will be applied to any telecommunications service. Also in 2022, Decree No. 11.304/2022 was published, establishing new rules for the Customer Service (SAC). The new “SAC Decree” brought more flexible rules regarding service hours, provision of protocol and digital service. In 2023, Decree No. 11,856/2023 was published, establishing the National Policy for Cybersecurity (PNCIBER) with cybersecurity guidelines in Brazil. This decree also creates the National Committee of Cybersecurity. In 2025, Decree No. 17,456/25 was published, providing for the exemption from licensing requirements for telecommunications stations that are part of machine-to-machine (M2M) communication systems. On December 26, 2025, Law No. 15,320 was enacted, extending until December 31, 2030 the tax benefits applicable to inspection fees for installation and operation, the Contribution for the Promotion of Public Broadcasting, and the Contribution for the Development of the National Film Industry (CONDECINE) levied on telecommunications stations that are part of machine-to-machine communication systems and small satellite stations. ANATEL Over the years, ANATEL has published several Resolutions that apply obligations to the telecommunications sector, among which we can highlight: Resolutions published in 2025 (i) Resolution No. 772/2025 (January 2025): approved the Brazilian Frequency Allocation, Designation and Distribution Plan (Plano de Destinação, Designação e Distribuição de Faixas de Frequências – PDFF), establishing the allocation, designation and specific conditions of use applicable to relevant frequency bands; (ii) Resolution No. 777/2025 (April 2025): repealed and amended prior resolutions and approved the General Telecommunications Services Regulation (Regulamento Geral de Serviços de Telecomunicações – RGST); (iii) Resolution No. 780/2025 (August 2025): amended the Regulation on Conformity Assessment and Type Approval (Homologation) of Telecommunications Products, including requirements applicable to data centers; (iv) Resolution No. 783/2025 (September 2025): approved the revised PGMC; and (v) Resolution No. 785/2025 (December 2025): approved ANATEL’s planning for future tendering processes (auctions) for authorizations to use radio frequencies associated with SMP under the Prisma framework. Main Public Consultations held in 2025 (i) Public Consultation No. 09/2025: planning for spectrum tendering processes to grant authorizations for the use of radio frequencies associated with SMP; (ii) Public Consultation No. 30/2025: network sharing and roaming obligations applicable to highways and remote or underserved areas; (iii) Public Consultation No. 31/2025: use of artificial intelligence by ANATEL for monitoring and supervisory activities; (iv) Public Consultation No. 32/2025: review of the cybersecurity regulation applicable to the telecommunications sector (Regulamento de Cibersegurança – R-Ciber); and (v) Public Consultation No. 48/2025: Conformity assessment requirements applicable to data centers integrated into telecommunications networks. Telecommunications Self-regulation System In March 2020, telecommunication operators signed the Telecommunications Self-Regulation System, or SART, which proposes to establish common rules and procedures that must be followed by all participating companies, in relation to the most material topics in the relationship between providers and customers, such as telemarketing (approved in September 2019), offers (approved in March 2020), billing (approved in February 2021) and attendance (approved in March 2020). Other Agencies We also monitored and participated in Public Consultations carried out by Brazil’s national electricity agency, Agência Nacional de Energia Elétrica, or ANEEL, on topics related to infrastructure sharing (poles) and distributed generation. In December 2025, ANEEL approved the draft joint resolution on distribution pole infrastructure sharing, which has been forwarded to Anatel for further review and final deliberation, as joint publication by both agencies is required for the new framework to enter into force. In this context, the matter remains included in Anatel’s 2025 Regulatory Agenda, with final approval currently expected in the first half of 2026. We also monitored and participated in Public Consultation carried out by Ministry of Finance, regarding the Economic and Competitive Aspects of Digital Platform. Review of the Current Regulatory Model for the Provision of Telecommunications Services In 2019, PLC 79/2016 was approved and converted into Law No. 13,879/2019. The Law entered into force on October 4, 2019, establishing a new regulatory framework for the telecommunications sector in Brazil, the major regulatory change in 20 years. The new telecommunications framework allows the fixed telephone concessionaires to adapt their agreements from a concession regime to an authorization regime. This change of concession to authorization must be requested by the concessionaire and it should be approved by the ANATEL. In return, concessionaires must, among other conditions, make investment commitments to expand fixed broadband services, in areas without adequate competition for these services to minimize gaps and inequalities between Brazilian areas. Additionally, it also changes the rules on authorization of radiofrequency uses, establishing subsequent renewals and allows Radiofrequency trading among players (spectrum secondary market). In June 2020, the Brazilian Federal Government published Decree No. 10,402/2020 which regulates Law No 13,879/2019 and provides for the adaptation of the concession instrument to authorization of telecommunications service and on the extension and transfer of radiofrequency authorization, grants of telecommunications service and satellite exploration rights. Oi, Claro, Telefônica and Algar have already signed Single Adaptation Agreement. Decree No. 10,402/2020 establishes that the partial or full transfer of the authorization to use radio frequencies between telecommunications service providers will be carried out against payment by ANATEL and must be preceded by ANATEL’s consent, in addition to enabling the maintenance of obligations associated to radiofrequencies (serving the public interest), the application of restrictions of a competitive nature when necessary/convenient and the analysis of our tax regularity to which the authorization is being transferred. It also confirmed that the current authorizations are covered by the new rule for successive renewals. Authorizations and Concessions With the privatization of the Telebrás system and pursuant to the Minimum Law (Lei Mínima), Band A and Band B service providers were granted concessions under Cellular Mobile Service (Serviço Móvel Celular), or SMC, regulations. Each concession was a specific grant of authority to supply mobile telecommunications services in a defined geographical area, subject to certain requirements contained in the applicable list of obligations attached to each concession. Our predecessors were granted SMC concessions and in December 2002, such SMC concessions were converted into PCS authorizations, with an option to renew the authorizations for an additional 15 years. We acquired PCS authorizations in conjunction with bandwidth auctions by ANATEL in 2001 and subsequently acquired additional authorizations and operations under the PCS regulations as well. In connection with the conclusion of the Reorganization whereby TIM Celular was merged into us (see “Item 4. Information on the Company—C. Organizational Structure”). We hold all of the authorizations previously issued in the name of other companies controlled, directly or indirectly, by TIM Participações. Obligations of Telecommunications Companies Among all the obligations imposed on telecommunications providers, Resolution No. 632/2014 had the most significant impact. Pursuant to this resolution, ANATEL approved the adoption of a single regulation for the telecommunications sector, the RGC, with general rules for customer service, billing, and service offers, which are applicable to fixed, mobile, broadband and cable TV customers. In November 2023, ANATEL published Resolution No. 765/2023, which approved the new General Regulation on Consumer Rights (Regulamento Geral de Direitos do Consumidor – RGC). This resolution revoked Resolution No. 632/2014 and established updated general rules governing customer service, billing and commercial offers applicable to fixed-line, mobile, broadband and cable television services. In December 2024, ANATEL’s Board of Directors reviewed requests submitted by telecommunications operators seeking the suspension of certain regulatory obligations and approved measures introducing greater flexibility in areas such as offer migration, data sources for adjustments, automatic renewals, billing during service suspension, asymmetry applicable to small providers and partner-related fees. The revised regulatory framework entered into force in September 2025. PCS Regulation In September 2000, ANATEL promulgated regulations regarding PCS wireless telecommunications services that are significantly different from the ones applicable to mobile companies operating under Band A and Band B. According to rules issued by ANATEL, renewal of a concession to provide mobile telecommunications services, as well as permission from ANATEL to transfer control of cellular companies, are conditioned on agreement by such cellular service provider to operate under the PCS rules. TIM Sul, TIM Nordeste and TIM Maxitel converted their cellular concessions into PCS authorizations in December 2002, and later transferred them to TIM Sul, TIM Nordeste and TIM Maxitel, which are now TIM S.A. (following the Reorganization and various intercompany mergers discussed herein) subject to obligations under the PCS regulations. See “—Authorizations and Concessions.” In recent years, ANATEL initiated certain administrative proceedings against TIM Celular (now TIM S.A.) for noncompliance with certain quality standards and noncompliance with its rules and authorization terms. We have been fined by ANATEL in some proceedings and are still discussing the penalty imposed in appeals before the agency. As a result of these proceedings, ANATEL applied some fines that did not have a material adverse effect on our business. As of December 31, 2025, the aggregate amount of fines under discussion in ongoing administrative and judicial proceedings totaled approximately R$250 million, adjusted for inflation, and was classified as a “possible loss.” On August 22, 2019, ANATEL’s board of officers unanimously approved the execution of a regulatory agreement, or TAC, with TIM S.A., effective for the 4 years after its execution. The agreement sets fines against us in the total amount of R$639 million. The commitment we assumed, as also approved by our Board of Directors on June 19, 2020, foresaw actions to develop our services from three different perspectives: (i) customer experience, quality and infrastructure, through initiatives to improve the licensing process of base stations and efficient use of resources, (ii) evolution of digital service channels, decreasing complaint rates and user repair demands, and (iii) reinforcement of transportation and access networks. In addition, the agreement also includes the commitment to bring mobile broadband through the 4G network to 350 cities with less than 30 thousand inhabitants thus reaching over 3.4 million people and the application of Internal Controls Management to ensure compliance with the closed proposal and the commitment to not impose inspection obstructions. As released to the market in June 16, 2020, and previously approved by ANATEL on August 22, 2019, the TAC provided the implementation of the new infrastructure in three years, with our assurance that these areas will be shared with other providers. In October 2024, we signed an amendment to extend by 90 days the deadline in connection with Year 4 Fiber installation commitment for 19 of the 82 cities, due to the adverse weather event that affected the State of Rio Grande do Sul in April and May 2024. ANATEL has formally certified the timely fulfillment of this commitment. TIM has been presenting its understanding to ANATEL in cases where the Agency pointed out signs of non-compliance with the Procedures for Determining Non-Conformity of Schedule Items (PADIC) eventually instituted. .We continue to do our best to fully comply with our obligations under the PCS regime or with future changes in the regulations to which we are subject. See “—Obligations of Telecommunications Companies,” “Item 3. Key Information—D. Risk Factors—Risks Relating to our Business” and “Item 8. Financial Information—A. Consolidated Statements and Other Financial Information—Legal Proceedings.” Significant Market Power In November 2012, ANATEL published a competition framework known as the PGMC. Also in November 2012, ANATEL published a series of regulations identifying groups with significant market power in the following relevant markets as defined by the PGMC published in 2012: (i) wholesale offer of fixed access infrastructure for data transmission through copper or coaxial cable in rates equal or higher than 10 Mbps (Act No. 6,617, of November 8, 2012); (ii) wholesale offer of fixed infrastructure for local and long distance transportation for data transmission in rates equal or higher than 34 Mbps (Act No. 6,619, of November 8, 2012); (iii) passive infrastructure for transport and access networks (Act No. 6,620, of November 8, 2012); (iv) mobile network termination (Act No. 6,621, of November 8, 2012); and (v) national roaming (Act No. 6,622, of November 8, 2012). In July 2018, ANATEL published the a new PGMC, which revised PGMC published in 2012 and created new markets: (i) mobile network; (ii) data traffic; (iii) data traffic exchange (iv) national roaming; and (v) high-capacity data transport. According to the PGMC published in 2018 proposal, cities in Brazil will be classified by levels of competition (1 – competitive, 2 – moderately competitive, 3 – less competitive, 4 – non-competitive), and asymmetric measures will be applied according to the market competition. In addition, also based on the proposal submitted to public consultation, wholesale relevant markets will be defined as follows: PGMC 2012 PGMC 2018 Wholesale mobile call termination Data traffic Data traffic exchange Wholesale mobile interconnection National roaming National roaming Full unbundling and bistream, or, wholesale fixed network infrastructure access less than 10 Mbps Wholesale fixed network infrastructure access Leased lines, interconnection class V, interlinking, or, wholesale fixed network infrastructure transport less than 34 Mbps Leased lines Ducts, trenches and towers, or passive infrastructure * towers regulated by law – Wholesale fixed interconnection – High capacity data transport Under the PGMC published in 2018, TIM has been classified as having significant market power in the following markets: (i) mobile network termination (otherwise referred to as the mobile network termination market); (ii) data traffic; (iii) data traffic exchange; (iv) national roaming; and (v) high-capacity data transport (five municipalities). The measures applied to a significant market power operator in those markets include: (a) the application of mobile termination rates on a glide path based on a price cap system and the partial application of the bill & keep system (“B&K”) (at a 50% threshold, (i.e., not a significant market power operator pays only if the terminated traffic on the significant market power operator network is more than 50% of the total traffic exchanged); and (b) an obligation to offer the service of national roaming service to operators not having significant market power. The PGMC published in 2018 was revised by Resolution No. 783/2025, issued by ANATEL. Under the revised PGMC published in 2025, we have been classified as having significant market power only in the mobile network termination and national roaming markets, reducing the scope of markets in which significant market power remedies apply. The measures applied to a significant market power in those markets continue to be the same as the ones described above. Due to our classification as having significant market power in certain markets, we are subject to increased regulation under the PGMC 2025, which could have an adverse effect on our business, financial condition and results of operations. Specifically, because we have been classified as having significant market power in the mobile network termination market, the rates charged by mobile service providers to other mobile service providers to terminate calls on their mobile networks, or VU-M, are regulated. On July 4, 2014, ANATEL approved, by means of Resolution No. 639/2014, a rule for the definition of maximum reference rates for entities with significant market power, based on a cost model, for VU-M, TU-RL, and EILD. Pursuant to ANATEL’s rule, reference rates will decline based on a glide path until the cost modeling known as BU-LRIC is applied (in 2019, for VU-M and TU-RL; and in 2020, for EILD). On July 7, 2014, ANATEL published the corresponding Acts Nos. 6,210/2014, 6,211/2014 and 6,212/2014, which determined the specific reference rates effective as of February 2016. On December 19, 2018, ANATEL published the corresponding Acts Nos. 9,918/2018, 9,919/2018 and 9,920/2018, which determined the specific reference rates effective as of February 2020. Before coming into force, ANATEL started revising these acts and, on February 24, 2020, published the new Acts Nos. 986/2020 and 987/2020. Finally, ANATEL published Act 3,246/2023, in which it edited the reference values until 2027 from the change from top-down model to bottom-up model. Because of our classification as having significant market power in the national roaming market, we must also offer roaming services to other mobile providers without significant market power at the rates approved by ANATEL. Until July 2018, roaming reference values were provided for in Act No. 9,157/2018. After deliberation by ANATEL’s Board, the new values are now provided for in Act No. 8,822/2022. For additional detail, see “—Lines of Revenue—Network Usage Charges,” “—Lines of Revenue—Roaming Fees,” “—Lines of Revenue —Interconnection Charges” and “—Lines of Revenue—Long Distance” above. Interconnection Regulation Telecommunication operators must publish a public interconnection offer on both economic and technical conditions and are subject to the “General Interconnection Regulatory Framework” issued by ANATEL in 2005. In October 2011, ANATEL established a mechanism for reducing fixed-to-mobile call rates, that results on a glide path to the reduction of mobile interconnection rates (VU-M) from 2012 to 2018, in accordance with Resolution No. 600/2012. In addition to the VU-M reduction, ANATEL established a B&K rule between significant market power and non-significant market power PCSs. From January 2013 until February 2015, the B&K was 80%/20%. On February 12, 2015, ANATEL approved, by means of Resolution No. 649/2015, the following new B&K percentages, amending the percentages established by Resolution No. 600: 75%/25%, from 2015 until 2016; 65%/35%, from 2016 until 2017; 55%/45%, from 2017 until 2018; and 50%/50%, from 2018 until 2019, which was the object of a judicial suit (ongoing), in order to suspend its effects. In July 2015, we filed a lawsuit seeking to annul Resolution No. 649/2015 and maintain the percentages originally established by Resolution No. 600/2012, which currently remains pending a final decision. However, as discussed above, the PGMC set the partial B&K threshold to 50% (i.e., a non-significant market power operator pays only if the terminated traffic on the significant market power operator network is more than 50% of the total traffic exchanged). In addition, ANATEL determined the end of the existing additional 20% on the value of mobile termination rate paid by significant market power operators to non-significant market power operators. Related to fixed interconnection, ANATEL revised the criteria for pricing the use of fixed networks in May 2012. According to such regulation, after January 1, 2014, a full B&K regime (in which no payments are due for the traffic termination) was implemented for local STFC operators dealing with other local STFC operators. Currently, therefore, no payments are due for the use of a local STFC operator’s network by other local STFC operator. With respect to interconnection of STFC operators with long distance and mobile operators, we understand that, in 2012, when ANATEL issued PGMC published in 2012, the asymmetrical measure that permitted STFC operators without significant market power to charge a TU-RL 20% higher than the TU-RL charged by STFC operator, with significant market power was revoked. In September 2016, we filed a lawsuit on this subject, which is still pending a final decision. On July 4, 2014, ANATEL approved, by means of Resolution No. 639/2014, a rule for the definition of maximum reference rates for entities with significant market power, based on a cost model, for VU-M and TU-RL, and for EILD. Wholesale Rates Regulation Under our PCS authorizations, we are allowed to set prices for our service plans, subject to approval by ANATEL, provided that such amounts do not exceed a specified inflation adjusted cap. ANATEL currently uses the telecommunication services index (Índice de Serviços de Telecomunicações), or IST, a specific price inflation index that it developed, in evaluating prices and determining the relevant cap for prices charged in the telecommunications industry. As mentioned above, on July 4, 2014, ANATEL approved the calculation of VU-M, TU-RL and EILD reference rates based on a cost model. We expect that the adjustment of our prices will follow the market trend, and that the adjustment will be below the annual inflation rate based on the IST. Number Portability In March 2007, ANATEL issued a new regulation regarding number portability in Brazil for fixed telephony and PCS providers. Portability is limited to migration between providers of the same telecommunications services. For PCS providers, portability can take place when a customer changes its services provider within the same Registration Area as well as when a customer changes the service plan of the same area. ANATEL finished the nationwide NP implementation schedule in March 2009. In 2023, providers implemented a token to reduce portability frauds. In July 2024, a pre-token solution was also implemented. Value-Added Services and Internet Regulation Value-added services are not considered under Brazilian telecommunications regulations to be telecommunications services, but rather an activity that adds features to a telecommunications service. Regulations require all telecommunications service providers to grant network access to any party interested in providing value-added services, on a non-discriminatory basis, unless technically impossible. Telecommunications service providers also are allowed to render value-added services through their own networks. Internet connection, when offered to users on a single basis, by parties other than telecommunications service providers, is considered by Brazilian legislation to be a value-added service, and its providers are not considered to be telecommunications companies. Current regulations allow us or any other interested party to offer Internet connection through our network. In such case, Internet connection would be deemed as a portion of the telecommunications service that enables users to navigate the Internet. In April 2014, the Brazilian President passed Law No. 12,965/2014, known as the Legal Framework for the Use of the Internet (Marco Civil da Internet), or the Internet Framework, which establishes the principles, guarantees, rights and duties for the use of the Internet in Brazil. Key topics covered in the Internet Framework are: net neutrality; collection, use and storage of personal data; confidentiality of communications; freedom of expression and the treatment of illegal, immoral or offensive contents. The Presidential Decree No. 8,711/2016 was enacted by the Brazilian President on May 11, 2016, and provided additional detail on the Internet Framework in three main aspects: (i) clarification of the scope and implementation of the net neutrality rules, (ii) implementation of the rights and obligations related to privacy and data protection regarding Brazilian Internet users, and (iii) governance of the Internet Framework, including authorities entitled to enforce the legislations. See “—Review of the Current Regulatory Model for the Provision of Telecommunications Services.” Privacy and Data Protection On August 14, 2018, the Brazilian Government passed the LGPD. This law is closer to the European Union General Data Protection Regulation, or GDPR, including significant extraterritorial application and considerable fines of up to 2% of a company’s global turnover of the previous financial year. The LGPD came into effect on September 18, 2020. However, the administrative sanctions provisions of LGPD only became enforceable as of August 1, 2021, pursuant to Law No. 14,010/2020. Cybersecurity incidents and data breach or leakage events may subject us to the following penalties: (1) warnings, with the imposition of a deadline for the adoption of corrective measures; (2) a one-time fine of up to 2% of gross sales of the company or a group of companies or a maximum amount of R$50,000,000 per violation; (3) a daily fine, up to a maximum amount of R$50,000,000 per violation; (4) public disclosure of the violation; (5) the restriction of access to the personal data to which the violation relates, until corrective measures are implemented; (6) deletion of the personal data to which the violation relates; (7) partial suspension of the databases to which the violation relates for up to 12 months, until corrective measures are implemented; (8) suspension of the personal data processing activities to which the violation relates for up to 12 months; and (9) partial or full prohibition on personal data processing activities. The Brazilian National Data Protection Agency, as well as other competent authorities, have initiated certain supervisory and administrative sanctioning procedures, as well as individual or collective legal actions based on the violation of the data subject’s rights and subject to civil liability. We have implemented a dedicated privacy and data protection governance structure to adapt our processes and technologies to the requirements of the LGPD. Among other measures, we have introduced specific data protection clauses in contracts with suppliers and business partners; adopted internal and external privacy policies addressing, among other matters, data retention and disposal, the exercise of data subject rights, privacy by design and by default, and incident response and remediation; and implemented mandatory training programs for employees and the sales force, as well as tailored training for senior management. In addition, in 2022, we participated in the preparation of the Code of Best Practices for Data Protection in the Telecommunications Sector, which establishes protocols aimed at supporting compliance with the LGPD. We continuously monitor our privacy and data protection management program with the objective of maintaining compliance with applicable laws and regulations. In this context, in 2020, 2021, 2022 and 2025, we received the highest rating in the “Who Defends Your Data?” survey conducted by InternetLab in partnership with the Electronic Frontier Foundation. This survey assesses how internet and technology companies protect users’ personal data. These results reflect our ongoing efforts and initiatives to strengthen data protection practices and promote compliance with the LGPD. Frequencies and Spectrum Background In connection with the PCS authorization auctions in 2001 and 2002, ANATEL divided the Brazilian territory into three separate regions, each of which is equal to the regions applicable to the public regime fixed-line telephone service providers. PCS services could only be provided under Bands C, D and E at that time with initially 1800 MHz band and afterwards also the 900 MHz band. We acquired the D band in regions II and III and the E band in region I, completing our national coverage when considering TIM Sul, TIM Nordeste and Maxitel coverage (each ultimately merged into us). On March 2016, the authorizations for the D and E bands were renewed. In December 2007, we acquired new authorizations for the 1,800 MHz frequency in São Paulo and Rio de Janeiro to improve our RF capacity in these regions. Within the same auction, Claro and Vivo acquired authorizations to provide PCS services in regions where we had historically provided services but where Claro and Vivo previously did not, using 1,800 MHz and 1,900 MHz bands. This resulted in increased competition in these regions. In the same auction, Oi received authorization to provide PCS services in the state of São Paulo using 1,800 MHz (band M in the whole state and band E in the state’s countryside). In December 2007, we acquired 3G frequencies sub-bands (1,900–2,100 MHz), with national coverage; these authorizations were granted in April 2008 and are valid until 2023. Oi, Claro, Vivo and Algar Telecom also acquired 3G frequencies sub-bands in the same auction carried out by ANATEL. All the authorization winners were subject to coverage and/or expansion commitments, divided by Municipality among the winners, in unserved areas. In December 2010, ANATEL auctioned an empty 3G band of radio spectrum consisting of (10+10) MHz in 2.1 GHz in the whole country (the “H Band” Auction), and other left-over frequencies in the 900 MHz and 1800 MHz bands that had not been assigned in previous auctions. In this auction: we, Vivo, Claro and Nextel (now America Movil) acquired blocks of frequencies. In December 2011, ANATEL auctioned 16 blocks in the 1,800 MHz band, which were sold to Claro, Oi, CTBC and TIM. As a result of our participation in the auction, we expanded our 2G coverage and increased our presence in the northern and central-western regions of Brazil, including the states of Paraná, Espírito Santo, Rio Grande do Sul, Santa Catarina and Minas Gerais. In 2012, ANATEL established a bidding process to comply with Presidential Decree No. 7,512 of June 2011, which set April 2012 as the deadline to auction the 2.5 GHz band, in order to introduce 4G technology in Brazil. ANATEL modeled the auction with two national blocks of (20+20) MHz (W and Z) and two national blocks of (10+10) MHz (V1 and V2). In order to guarantee full rural service by 2018, ANATEL linked the 4G blocks to the 450MHz band in specific geographic regions of Brazil. Then, in 2022, through Act No. 12,827, published on September 13, 2022, the 450 MHz block was extinguished. As indicated in the notice, the winners of the auction committed themselves to the waiver if services were not activated within the established time frame. We participated in the auction as a group bidding in the name of TIM and Intelig (now known as TIM S.A.). We did not bid for the W block (Amazonas as a rural area), which we viewed as having a high premium if compared to the X block (67%). We successfully acquired the V1 block, which in our view held the best capital expenditure/operating expenditure profile associated with rural services in its selected regions (the States of Rio de Janeiro, Espírito Santo, Santa Catarina, and Paraná). The joint bid allowed us to take advantage of the flexibility of the auction rules. These bands brought heavy coverage obligations as its short-range characteristics demands large investments. In November 2013, ANATEL approved the dedication of a single band, of the 700MHz spectrum, exclusively to mobile services and in September 2014, ANATEL concluded the 700 MHz spectrum auction that granted to us, Vivo, Claro and Algar the operation of the 700 MHz frequency for the 4G mobile technology, to be added to the current LTE service in the 2.5 GHz RF. We bid on Block 2 of that auction, for national coverage of the 700 MHz band, and won the same with a bid of R$1,947 million (a 1% premium over the minimum price of R$1,927 million). The auction also required the winning bidders to proportionally reimburse the broadcasters for the cleanup of the spectrum previously held and used by them. We spent R$1,199 million to create in March 2015 the EAD with the other winning bidders, to ensure the spectrum cleanup. The price allocated to the cleanup of the spectrum related to unsold blocks was shared proportionately among the winning bidders who bought the other blocks. To offset such additional cost to the winning bidders, the price of the 700 MHz spectrum was discounted using ANATEL’s WACC methodology. In September 2019, all Brazilian municipalities can receive TIM’s expanded 4G coverage through the 700 MHz band. In December 2015, ANATEL auctioned remaining radio frequencies in the 1,800 MHz, 1,900 MHz and 2,500 MHz bands. We submitted bids for the left over lots of the 2,500 MHz band, which had originally been auctioned in 2012. This particular band spectrum provides for 4G mobile services. We were the first ranked bidder in the lots for Recife, in the state of Pernambuco, and Curitiba, in the state of Paraná, based on our bids which totaled R$57.5 million. The corresponding authorization terms were executed by ANATEL in July 2016. In November 2021, TIM acquired 11 lots in the 5G Auction, with a total value offered of R$1.05 billion, in three frequency bands 3.5 GHz, 2.3 GHz and 26 GHz. The acquired bands have a set of obligations that must be met with financial contributions or the construction of mobile and fixed network infrastructure. Currently, according to Decree No. 10,402/2020, which regulates Law No. 13,879/2019, it is possible to renew licenses for successive periods. However, some conditions are being disputed with ANATEL and judicially, as well as pending validation by the Federal Court of Acounts - TCU (Tribunal de Contas da União), such as value and term of renewal. The actual scenario of frequencies granted to us by ANATEL is presented on the tables below: Territory Frequencies UF 450 MHz 700 MHz 800 MHz 900 MHz 1800 MHz Additional 1800 MHz 1900 MHz (3G) 2100 MHz (3G) Acre December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Alagoas December 2029 December 2028 December 2032 December 2032 - April 2038 April 2038 Amapá December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Amazonas December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Bahia December 2029 August 2027* August 2027* August 2027* - April 2038 April 2038 Ceará December 2029 November 2028* November 2032 December 2032* - April 2038 April 2038 Distrito Federal December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Territory Frequencies UF 450 MHz 700 MHz 800 MHz 900 MHz 1800 MHz Additional 1800 MHz 1900 MHz (3G) 2100 MHz (3G) Espírito Santo December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Goiás December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Maranhão December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Mato Grosso December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Mato Grosso do Sul December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Minas Gerais *** December 2029 April 2028* April 2028* April 2028* April 2032 April 2038 April 2038 Pará December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Paraíba December 2029 November 2028* December 2032 November 2032* - April 2038 April 2038 Paraná December 2029 November 2028* December 2032* and April 2032 for the cities of Londrina and Tamarana December 2032* and April 2032 for the cities of Londrina and Tamarana April 2032 April 2038 April 2038 Pernambuco December 2029 November 2028* May 2032* December 2032* - April 2038 April 2038 Piauí December 2029 November 2028* March 2032* December 2032* - April 2038 April 2038 Rio de Janeiro December 2029 March 2031* March 2031* - April 2038 April 2038 Rio Grande do Norte December 2029 November 2028* December 2032 December 2032* - April 2038 April 2038 Rio Grande do Sul December 2029 November 2028* city of Pelotas and its surrounding region March 2031* and April 2032 city of Pelotas and its surrounding region March 2031* and December 2032* city of Pelotas and its surrounding region April 2032 April 2038 April 2038 Rondônia December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Roraima December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Santa Catarina December 2029 November 2028* September 2032 December 2032* April 2032 April 2038 April 2038 São Paulo December 2029 March 2031* March 2031* Interior – April 2032 April 2038 April 2038 Sergipe December 2029 August 2027* August 2027* August 2027* - April 2038 April 2038 Territory Frequencies UF 450 MHz 700 MHz 800 MHz 900 MHz 1800 MHz Additional 1800 MHz 1900 MHz (3G) 2100 MHz (3G) Tocantins December 2029 March 2031* March 2031* April 2032 April 2038 April 2038 Territory Frequencies UF 2300 MHz 2500 MHz V1 Band (4G) 2500 MHz P Band** (4G) 3500 MHz (5G) 26 GHz (5G) Additional 26 GHz (5G) Additional 26 GHz (5G) Acre - October 2027 - December 2041 December 2031 - - Alagoas - October 2027 - December 2041 December 2031 - - Amapá - October 2027 - December 2041 December 2031 - - Amazonas - October 2027 - December 2041 December 2031 - - Bahia - October 2027 - December 2041 December 2031 - - Ceará - October 2027 - December 2041 December 2031 - - Distrito Federal - October 2027 December 2041 December 2031 - - Espírito Santo December 2041 October 2027 - December 2041 December 2031 December 2031 December 2041 Goiás - October 2027 - December 2041 December 2031 - - Maranhão - October 2027 - December 2041 December 2031 - - Mato Grosso - October 2027 - December 2041 December 2031 - - Mato Grosso do Sul - October 2027 - December 2041 December 2031 - - Minas Gerais *** December 2041 October 2027 February 2030* December 2041 December 2031 December 2031 December 2041 Pará - October 2027 December 2041 December 2031 - - Paraíba - October 2027 - December 2041 December 2031 - - Paraná December 2041 October 2027 December 2041 December 2031 December 2031 December 2041 Pernambuco - October 2027 July 2031 (city of Recife) December 2041 December 2031 - - Piauí - October 2027 - December 2041 December 2031 - - Rio de Janeiro December 2041 October 2027 December 2041 December 2031 December 2031 December 2041 Rio Grande do Norte - October 2027 - December 2041 December 2031 - - Rio Grande do Sul December 2041 October 2027 - December 2041 December 2031 December 2031 December 2041 Rondônia - October 2027 - December 2041 December 2031 - - Roraima - October 2027 - December 2041 December 2031 - - Santa Catarina December 2041 October 2027 - December 2041 December 2031 December 2031 December 2041 Territory Frequencies UF 2300 MHz 2500 MHz V1 Band (4G) 2500 MHz P Band** (4G) 3500 MHz (5G) 26 GHz (5G) Additional 26 GHz (5G) Additional 26 GHz (5G) São Paulo - October 2027 - December 2041 December 2031 December 2031 (except sector 33) December 2041 (except sector 33) Sergipe - October 2027 - December 2041 December 2031 - - Tocantins - - December 2029 March 2031* March 2031* March 2031* December 2031 * Terms already renewed for 15 years. ** Only covers complementary areas in the specified states. The Radio frequency Blocks of the Municipalities of the National Code 92, which were part of Lot 208, were returned. *** Except for the cities in sector 3 of PGO for 3G and excess radio frequency. (1) New renewal requests for 850 MHz are under discussion with ANATEL and the Federal Court of Accounts (TCU). Any potential denial of the renewal could result in the loss of the right to use the 850 MHz band, requiring a structural reconfiguration of the network to preserve voice and data coverage. Such reconfiguration would necessitate significant investments, with corresponding impacts on CAPEX and OPEX, as well as potential adverse effects on service quality. Industrial Exploration of Dedicated Lines In December 2010, ANATEL approved a public hearing that considered alterations of the EILD, which established mechanisms for the operation of transmissions circuits up to 34 Mbps to increase transparency between operators and concessionaires. In May 2012, ANATEL approved the new EILD regulations (Regulação de Exploração Industrial de Linha Dedicada), or REILD, detailing mechanisms to optimize the operating structure for transmission loop contracts in order to increase contract price transparency and affording equal treatment to independent service providers from concessionaire groups. The REILD was subsequently revoked, as EILD was no longer classified as a relevant market under the PGMC published in 2025. The REILD was subsequently revoked, as EILD was no longer classified as a relevant market under the PGMC published in 2025. Migration of the Mobile Networks with Analog Technology Quality Management Regulation In the fourth quarter of 2017, ANATEL introduced the Quality of Telecommunications Services Regulation (Regulamento de Qualidade dos Serviços de Telecomunicações – “RQUAL”), which was formally approved in December 2019. Under this regulation, telecommunications service providers are assessed against a set of quality and performance indicators and assigned a grade ranging from A to E, covering mobile, fixed-line, broadband and pay television services at both national and municipal levels. Quality measurements are conducted in six-month cycles. Pursuant to the RQUAL, ANATEL may adopt corrective or preventive measures when deemed necessary, including consumer compensation, the imposition of mandatory action plans or other precautionary measures aimed at improving service quality standards and strengthening consumer protection, such as allowing customers to terminate service agreements without penalty in cases of persistently inadequate service quality. Between 2019 and 2025, ANATEL conducted a series of technical discussions with telecommunications operators to review measurement criteria, assess methodological refinements and address factors that could affect the reliability of quality indicators. In December 2025, ANATEL published the first quality labels based on performance results for the period from January to June 2025. Throughout this process, we have participated in discussions aimed at identifying recurring operational or systemic issues that could affect the accuracy or consistency of quality measurements. Fraud Detection and Prevention Commercial Fraud Management Develop strategies to mitigate the fraud risk on customer identification in the processes related to the services provided by us, such as providing (i) digital and biometrics authentication; (ii) analysis of the customer documentation; (iii) continuous improvement on fraud detection strategies using registration and trafic data(iii) a list of known offenders to prevent fraud; (iv) a comprehensive staff training program f; (v) continuous monitoring and identification of points of sale. Security operations management develops and implements strategies to mitigate risks across several key areas: Network Security Proactive measures to combat theft, vandalism, and damage to our network infrastructure by applying physical and electronic protections. These include equipment tracking, the installation of protective security measures, and the use of virtual and physical surveillance, combined with intelligence analysis. Incident Investigations Ensure the investigation of internal and external fraudulent occurrences related to corporate matters, supporting the adoption of mitigation measures, as well as conducting actions for the prevention and combat of internal and external fraudulent practices within the administrative environment. Personal Security Combined organizational, technical, and human resources to safeguard and preserve the physical, intellectual, and emotional integrity of employees. Our efforts ensure that security operations are in line with industry standards, compliance with the security operations mission. Commercial Security Reduce losses resulting from device theft by installing safes for the secure storage of high-value devices in stores, prioritizing street-front locations, and implementing electronic monitoring systems such as surveillance cameras and motion sensors to enhance security and identify suspicious activities in real-time. Logistics Security Provide support in preventing theft and merchandise losses during transportation and storage by conducting risk analysis, monitoring results, and maintaining close interaction with logistics operators. Taxes on Telecommunications Goods and Services The telecommunications goods and services offered are subject to a variety of federal, state and local taxes (in addition to taxes on income), the most significant of which are ICMS, ISS, COFINS, PIS, FUST, FUNTTEL, FISTEL, CONDECINE, IRPJ and CSLL, which are described below. · ICMS. The principal tax applicable to goods and telecommunication services is a state value-added tax (Imposto sobre Operações Relativas à Circulação de Mercadorias e sobre Prestações de Serviços de Transporte Interestadual, Intermunicipal e de Comunicação) (“ICMS”), which the Brazilian states levy at varying rates on certain revenues arising out of the sale of goods and services, including certain telecommunications services. Currently, the ICMS tax rate for domestic telecommunications services is levied at rates between 17% and 29%. The ICMS tax rate levied on the sale of mobile handsets and other products such as modem and SIM cards averages between 17% and 24%. With respect to the sale of mobile handsets, among other goods, ICMS may be charged in a different tax regime, under which another taxpayer in the distribution chain of the goods (such as, for example, the manufacturer of the goods) is required to anticipate and pay ICMS amounts that would otherwise be due in other steps of the distribution chain. There is also an exception for certain handsets whose manufacturers are granted certain local tax benefits, thereby reducing the rate to as low as 7%. · ISS. Since January 2018, the tax incidence over certain (but not all) value-added services has increased with the inclusion of those receivables within the ISS basis of calculation due to Law No. 157/2016, which is a municipality tax with rates varying from 2% to 5%. · COFINS. COFINS is a social contribution levied on gross revenues. Since 2000, companies began to pay COFINS tax on their bills at a rate of 3%. In December 2003, through Law No. 10,833, COFINS legislation was further amended, becoming a non-cumulative tax, raising the rate to 7.6% for most transactions. However, telecommunications services revenues, among others, continued subject to a cumulative basis at a rate of 3%. In 2015, Decree No. 8,426 came into effect, which restored COFINS on financial revenues at a rate of 4%, except for some types of financial revenues (for example, revenues from foreign exchange variations of exportation of goods and services, revenues resulting from foreign exchange fluctuations of obligations undertaken by the company, including loans and financing and revenues related to hedging transactions on stock exchange values, and revenues from commodities and futures exchanges or over-the-counter transactions and related to our operational activities). In December 2022, Decree No. 11,322/22 reduced by half the PIS and COFINS rates levied on financial income earned by companies subject to the non-cumulative regime. The COFINS rates changed from 4% to 2%. According to the Decree, the reduction would take effect from January 1, 2023. However, on January 2, 2023, it was revoked by the newly elected Government, reestablishing the PIS and COFINS rates levied on financial income to its original values. · PIS. PIS is another social contribution levied at the rate of 0.65%, on gross revenues from telecommunications service activities. In 2002, Law No. 10,637 was enacted, making such contribution non-cumulative and increasing the rate to 1.65% on gross revenues, except in relation to telecommunications services, for which the method continued on a cumulative basis at a rate of 0.65%. In 2015, Decree No. 8,426 came into effect, which restored PIS on financial revenues at a rate of 0.65%, except for some types of financial revenues (for example, revenues from foreign exchange variations of exportation of goods and services, revenues resulting from foreign exchange fluctuations of obligations undertaken by the company, including loans and financing and revenues related to hedging transactions on stock exchange values, and revenues from commodities and futures exchanges or over-the-counter transactions and related to our operational activities). As noted above, in December 2022, Decree No. 11,322/22 reduced by half the PIS and Cofins rates levied on financial income earned by companies subject to the non-cumulative regime. The PIS rates changed from 0.65% to 0.33%. According to the Decree, the reduction would take effect from January 1, 2023. However, on January 2, 2023, it was revoked by the new Government, reestablishing the PIS and Cofins rates levied on financial income to its original values. · FUST. In 2000, the Brazilian government created the Fundo de Universalização dos Serviços de Telecomunicações (“FUST”), a fund that is supported by a tax applicable to all telecommunications services. The purpose of the FUST is to stimulate the expansion, use and improvement of the quality of telecommunications networks and services, to reduce regional inequalities and to stimulate the use and development of new connectivity technologies to promote economic and social development. FUST tax is imposed at a 1% rate, levied on gross operating revenues, net of discounts, ICMS, PIS and COFINS, and the cost may not be passed on to clients. Telecommunication companies can draw from the FUST to meet the universal service targets required by ANATEL. · In 2005, ANATEL enacted Ordinance No. 7/05 requiring that FUST should be paid on revenues arising from interconnection charges since its effectiveness. A notice was issued deciding that we must adjust values on the FUST calculation basis to include interconnection revenues received from other telecommunications companies. A writ of mandamus was filed against ANATEL to avoid the terms of Ordinance No. 7/05. The first level decision was issued in our favor. Such decision was challenged by ANATEL and the Appeal judgment confirmed the first level decision. ANATEL appealed to High Courts to reverse the Appeal decision. · In December 2020, Law No. 14,109 was approved with the purpose of stimulating the use of FUST to expand and improve the quality of telecommunications services, reducing regional inequalities and stimulating the use of new technologies to promote economic and social development. In the case of using FUST’s resources, the law requires the connection of all public schools by 2024 with broadband internet access. The law also provided a 50% reduction in the payment of the mandatory annual contribution of telecommunications operators to the Fund when they execute programs, projects, plans, activities, initiatives, and actions approved by the Fund’s Management Council using their own resources. This requirement remains in force until December 2016, but it may be further renewed. · In the first quarter of 2022, the Brazilian Federal Government signed Decree 11,004/2022, which regulates the use of FUST and establishes directions for the use of resources by the Management Board, established in 2022. · FUNTTEL. In 2000, the Brazilian government created the Fundo para Desenvolvimento Tecnológico das Telecomunicações (“FUNTTEL”), a fund that is supported by, among other sources of income, a contribution tax applicable to all telecommunications companies. FUNTTEL is a fund managed by BNDES and FINEP, government research and development agencies. The purpose of FUNTTEL is to promote the development of telecommunications technology in Brazil and to improve competition in the industry by financing research and development in the area of telecommunications technology. FUNTTEL tax is imposed at a rate of 0.5% on gross operating revenues, net of discount, ICMS, PIS and COFINS, and it cost may not be passed on to clients. · FISTEL. Fundo de Fiscalização das Telecomunicações (“FISTEL”), is a fund supported by among other sources a tax applicable to telecommunications services, which was established in 1966 to provide financial resources to the Brazilian government for its regulation and inspection of the sector. Such tax consists of: (1) an installation inspection fee assessed on telecommunications stations upon the issuance of their authorization certificates, as well as every time a new mobile number is activated, and (2) an annual operations inspection fee that is based on the number of authorized stations in operation, as well as the total basis of mobile numbers at the end of the previous calendar year. The amount of the installation inspection fee is a fixed value, depending on the kind of equipment installed in the authorized telecommunication station. · Effective in 2001, the installation and inspection fee is assessed based on net activations of mobile numbers (that is, the number of new mobile activations reduced by the number of canceled subscriptions), as well as based on the net additions of radio base stations. The operations inspection fee equals 33% of the total amount of installation inspection fees that would have been paid with respect to existing equipment. The public funds raised from this installation fee are appropriated to either the Brazilian Communication Company (“EBC”), or the Brazilian National Cinema Agency (Agência Nacional do Cinema) (“ANCINE”), in order to benefit Brazilian cinema industry. Also, ANATEL charges the installation inspection fee when there is an extension of the term of validity of the right to use radio frequencies associated with the operation of the personal mobile service. We understand that such collection is unjustified and is challenging this rate in court. · On December 2020, Law No. 14,108 was sanctioned and exempts FISTEL for 5 (five) years from the base stations and equipment that integrate the machine-to-machine (M2M) ecosystems and, also, extinguishes the prior licensing. The definition and regulation of M2M communication systems shall be established by ANATEL. The Brazilian government also laid out in the budget law for 2021 a tax exemption forecast of FISTEL value. Additionally, in June 2021, Law No. 14,173 was approved, lowering the FISTEL fees on VSATs from R$201.12 to R$26.83. · Law No. 15,320 of December 26, 2025, extended until December 31, 2030, the existing tax exemptions applicable to M2M communication devices and small satellite stations. The measure is effective from January 1, 2026, and will remain in force until December 31, 2030. · IRPJ and CSLL. Income tax expense is a combination of two different types of taxes, the IRPJ and the CSLL. The IRPJ is payable at the rate of 15% plus an additional rate of 10% (levied on the part of taxable profits that exceed R$0.02 million per month or R$0.24 million per year). The CSLL is currently assessed at a rate of 9% of adjusted net income. Regarding dividends, Law No. 12,973 ensured the full and unconditional exemption on payment or credit of profits or dividends earned between 2008 and 2013, previously paid or not. Uncertainty remained, however, in relation to exemption on profits and dividends generated in the calendar year 2014, if higher than the taxable income in the same period in the case of companies that do not opt for early adoption of the new post-RTT tax regime that year. According to the Federal tax authorities the exception is not applicable to the excess amount, or in other words, to the profits and dividends paid more than the taxable income. On November 27, 2025, Brazil enacted Law No. 15,270, which introduced a material change to the long-standing tax exemption regime applicable to profits and dividends. Under the prior regime, in force since 1996, profits and dividends were generally exempt from taxation. The new law partially reverses this approach by reintroducing taxation on profits and dividends paid to certain beneficiaries. The applicable tax treatment varies depending on whether the beneficiary is a resident or non-resident of Brazil. For Brazilian resident individuals, a 10% withholding income tax is imposed on the distribution of profits and dividends by the same legal entity to the same individual when the aggregate amount exceeds R$50,000 in a single month. In such cases, the distributing legal entity is required to withhold the applicable income tax at source. If the individual’s total income in a given calendar year exceeds R$600,000, profits and dividends received from 2026 onward must be reported under the Annual High-Income Taxation Regime introduced by Law No. 15,270/2025. Any income tax withheld by the distributing entity during the calendar year may be credited against the tax due under this regime. Where the individual’s total annual income, including profits and dividends and other income, does not exceed R$600,000, any income tax withheld at source on distributed profits and dividends may be refunded, in accordance with the rules set forth in Law No. 15,270/2025. In addition, under the terms of that law, a tax reduction may be available to Brazilian resident individuals subject to the Annual High-Income Taxation Regime if the combined effective tax burden on corporate profits and distributed dividends exceeds the standard corporate income tax rate, which is currently 34% for us. Dividend distributions to other legal entities domiciled in Brazil remain exempt from income tax. For non-resident individuals or legal entities, as a general rule, profits and dividends paid or remitted abroad are subject to a 10% withholding income tax, regardless of the amount distributed. Under the terms of Law No. 15,270/2025, a non-resident beneficiary may request a tax credit if the combined effective tax burden on corporate profits and distributed dividends exceeds the standard Brazilian corporate income tax rate of 34%. The new taxation regime does not apply to profits earned through the 2025 calendar year, provided that the resolution approving the distribution of such dividends is adopted by the competent corporate body by December 31, 2025, and the dividends are paid in accordance with applicable corporate law and regulations issued by the RFB. Accordingly, we approved and paid dividends related to profits earned through the 2025 calendar year in December 2025. Because dividend payments are not tax deductible for the distributing company, Brazilian tax law provides an alternative form of shareholder remuneration known as “interest on equity,” which allows companies to deduct the amount paid to shareholders from taxable net income, subject to statutory limitations. These distributions may be paid in cash. The interest is calculated in accordance with daily pro rata variation of the Brazilian government’s long-term interest rate (“TJLP”), as determined by the Central Bank from time to time, and cannot exceed the greater of: (1) 50% of the net income (before taxes and already considering the deduction of the own interest amount attributable to stockholders) related to the period in respect of which the payment is made; or (2) 50% of the sum retained profits and profits reserves as of the date of the beginning of the period in respect of which the payment is made. Any payment of interest to stockholders is subject to withholding income tax at the rate of 15%, increasing to 17.5% as of 2026 according to Complementary Law No. 224 of December 26, 2025 (or, lower rates for some jurisdictions, such as, 12.5%, as provided in certain Double Taxation Treaties), or 25% in the case of a stockholder domiciled in a Low or Nil Tax Jurisdiction. These payments may be qualified, at their net value, as part of any mandatory dividend. As described herein, we paid interest on equity in 2025. Please refer to “Item 5. — Operating and Financial Review and Prospects—Dividend Distribution—Interest on Equity” for detailed information. Tax losses carried forward are available for offset during any year up to 30.0% of annual taxable income. No time limit is currently imposed on the application of net operating losses on a given tax year to offset future taxable income within the same tax year, nevertheless there is no monetary restatement. Companies are taxed based on their worldwide income rather than on income produced solely in Brazil. As a result, profits, capital gains and other income obtained abroad by Brazilian entities are added to their net profits for tax purposes. Therefore, profits, capital gains and other income obtained by foreign branches or income obtained from subsidiaries or foreign corporations controlled by a Brazilian entity are computed in the calculation of an entity’s profits, in proportion to its participation in such foreign companies’ capital. In the end of 2017, the RFB, issued Normative Instruction No. 1,771/2017 in order to determine the tax treatment due to the accounting CPC 47 – Customer Contract Revenue, which tax treatment went into effect in 2018. IRPJ and CSLL are regulated by Decree No 9,580/2018 and Normative Instruction RFB No. 1,700/2017 in addition to other federal laws and decrees. ANATEL Administrative Proceedings Under the terms of its PCS authorization, TIM Celular (now TIM S.A.) implemented mobile personal telecommunications coverage for the assigned area. Under such term of authorization, TIM Celular (now TIM S.A.) is required to operate in accordance with the quality standards established by ANATEL. If it fails to meet the minimum quality standards required, TIM Celular (now TIM S.A.) is subject to Obligation Non-Compliance Determination Procedures, or PADO, and applicable penalties. ANATEL has brought administrative proceedings against the TIM Group, which are currently pending for (1) noncompliance with certain quality service indicators (the quality management regulation, or RGQ, and/or RQUAL); and (2) default of certain other obligations assumed under the Terms of Authorization and pertinent regulations. In its defense before ANATEL, the TIM Group attributed the lack of compliance to items beyond its control and not related to its activities and actions. We cannot predict the outcome of these proceedings at this time but have accrued the amount in our balance sheet as a provision for all those cases in which we estimate our loss to be probable. Disclosure Pursuant to Section 219 of the Iran Threat Reduction and Syria Human Rights Act Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 added Section 13(r) to the Exchange Act. Section 13(r) requires an issuer to disclose in its annual or quarterly reports filed with the SEC whether the issuer or any of its affiliates has knowingly engaged in certain activities, transactions or dealings with the Government of Iran, relating to Iran or with designated natural persons or entities involved in terrorism or the proliferation of weapons of mass destruction during the period covered by the annual or quarterly report. Disclosure is required even when the activities were conducted outside the United States by non-U.S. entities and even when such activities were conducted in compliance with applicable law. In addition, we also disclose our affiliates’ activities relating to countries with economic sanctions. We entered into Roaming Agreements for the provision of telecommunication services with mobile networks, from Cuba, Lybia, North Korea, Iran, Russia, Sudan, Syria and Ukraine (Crimea occupied territories). In accordance with our Code of Ethics, we seek to comply with all applicable laws. Our activities relating to countries with economic sanctions We are not, to our knowledge, engaged in any activities, transactions or dealings with the Government of Cuba, North Korea, Iran, Russia, Syria and the Ukrainian occupied territories (Crimea, Donetsk, Luhansk, Kherson and Zaporizhzhia), or the Designated Countries. The activities, transactions or dealings we had in the year ended December 31, 2025 related in any way to Designated Countries are, to our knowledge, roaming agreements for the provision of telecommunication services, which allow our mobile customers to use their mobile devices on a network outside their home network, or Roaming Agreements. In our view, the amounts related to these operations, detailed below, are immaterial to our business. We do not have any agreement with providers from North Korea. Roaming Agreements with the following local mobile phone operators: · MTN Irancell and MCI Iran Telecom, in Iran; · Etecsa (also known as Cubacel), in Cuba; · Syriatel Mobile Telecom SA and MTN Syria, in Syria; · JSC Kyivstar and LLC Lifecell, in Ukraine; · Megafon, MTS, VIMPELCOM, in Russia. The impact on our consolidated statement of income arising from Roaming Agreements with networks of the Designated Countries is detailed as follows: Year ended December 31, 2025 Revenues Charges (in reais) NorthKorea 0 0 Iran 1,663.26 0 Cuba 9,225.28 28.46 Ukraine 135.40 584.71 Russia 168,083.52 170,174.36 Syria 212.29 0 Total 179,319.75 170,787.53 Year ended December 31, 2024 Revenues Charges (in reais) North Korea - - Iran 245,356.21 22,155.51 Cuba 4,075.07 74,339.97 Syria 46,283.17 106,635.55 Total 295,714.45 203.131,03 Year ended December 31, 2023 Revenues Charges (in reais) North Korea - - Ukraine 1,321.00 390.48 Sudan 1,118.81 166.89 Russia 334,733.00 12,761.33 Iran 4,743.50 - Cuba 140,192.00 48.00 Syria 87.73 - Total 482,196.04 13,316.70 Telecom Italia activities relating to Designated Countries The information in this section is based solely on information provided to us by our parent Telecom Italia for the purpose of complying with our obligations under Section 13(r) of the Exchange Act. Telecom Italia informs us that the activities, transactions or dealings it and its consolidated subsidiaries had in the year ended December 31, 2025 that, to its knowledge, relate to Designated Countries are (1) Roaming Agreements, (2) international telecommunications services agreements with international carriers, which cover delivery of traffic, or International Carrier Agreements, and (3) commercial sale and other agreements, or Commercial Sale and Other Agreements. Telecom Italia informed us that the only activities that it and its consolidated subsidiaries had in the years ended December 31, 2025 and 2024, that, to its knowledge, relate in any way to the Designated Countries are: Roaming Agreements Its Roaming Agreements are with the following local mobile phone operators: · North Korea: none; · Iran: Mobile Company of Iran (MCI), (Rightel Communication) Rightel Telecommunication Service Company, Irancell (MTN) Telecommunications Services Company, (TKC-KFZO) Telecommunication Kish Company, Taliya Communicational Development Company and Telecommunication Company of Iran (TCI); · Cuba:- Empresa de Telecomunicaciones de Cuba - ETECSA (ex Cubacel and ex C Com); · Syria: Syriatel Mobile Telecom SA (Syriatel), MNT Syria (ex Spacetel Syria). Year ended December 31, 2025 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 1 17 564 539 Cuba 1 110 1 (145)* Syria - - 54 140 Total 2 127 619 534 Year ended December 31, 2024 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 1 42 563 508 Cuba 29 357 1 (119)* Syria - 2 53 138 Total 30 401 617 527 (*) Payables are positive due to traffic discounts to be invoiced. Year ended December 31, 2023 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 4 67 571 467 Cuba 1 75 - 76 Syria - 3 54 139 Total 5 145 625 682 The amounts of revenues, charges, receivables and payables are considered de minimis by Telecom Italia’s compared to its consolidated revenues, operating expenses, trade receivables and trade payables, respectively. International Carrier Agreements Telecom Italia’s subsidiary Telecom Italia Sparkle S.p.A., or TI Sparkle, has agreements with Empresa de Telecomunicacione de Cuba SA and Syrian Telecommunication Est. The purpose of these International Carrier Agreements is to allow the uninterrupted exchange of international traffic. Consequently, Telecom Italia intends to continue maintaining these agreements. Year ended December 31, 2025 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran - - - - Cuba 339 829 409 822 Syria - 3 3 8 Total 339 832 412 830 Year ended December 31, 2024 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran - - - - Cuba 597 1,121 1,102 3,832 Syria - 5 14,180 16,596 Total 597 1,126 15,282 20,428 Year ended December 31, 2023 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran - - - - Cuba 639 2,577 1,190 4,746 Syria 1 8 13,332 15,609 Total 640 2,585 14,522 20,355 The amounts of revenues, charges, receivables and payables are considered de minimis by Telecom Italia’s compared to its consolidated revenues, operating expenses, trade receivables and trade payables, respectively. Commercial Sale and Other Agreements TI Sparkle provided until 2023 institutional access to Internet to Syria by means of Seabone IP ports and data transmission capacity through international cable systems located outside the Syrian territory. . TI Sparkle also offers Internet Access services to Telecommunication Infrastructure Company of Iran and Empresa de Telecomunicaciones de Cuba SA and Syryan Telecommunications H.Q.through its international IP backbone system Seabone. Year ended December 31, 2025 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 1,002 0 2,650 690 Cuba 2,530 297 3,650 - Syria - - 1,130 - Total 3,532 297 7,430 690 Year ended December 31, 2024 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 1,079 63 2,789 690 Cuba 3,547 336 7,410 336 Syria - - 3,697 - Total 4,626 399 13,896 1,026 Year ended December 31, 2023 Revenues Charges Receivables Payables (thousands of euros) North Korea - - - - Iran 1,039 28 2,447 626 Cuba 3,514 - 6,678 - Syria 1 - 3,476 - Total 4,554 28 12,601 626 The amounts of revenues, charges, receivables and payables are considered de minimis by Telecom Italia’s compared to its consolidated revenues, operating expenses, trade receivables and trade payables, respectively. C. Organizational Structure We are part of the Telecom Italia Group, which is engaged in the communications sector and, particularly, the fixed and mobile national and international telecommunications sector. The operating segments of the Telecom Italia Group are organized according to the respective geographical location of the telecommunications business (Domestic—Italy and Brazil). We are currently held, indirectly, by Telecom Italia, which as of December 31, 2025, held 68.19%% of our shares. As of March 30, 2026, the largest shareholders of Telecom Italia were Poste Italiane S.p.A. and BlackRock, Inc. According to public filings and press releases by Telecom Italia and its shareholders, Poste Italiane held approximately 27.32% of Telecom Italia’s ordinary shares, following (i) the acquisition, in March 2025, of a 15.0% stake in Telecom Italia’s ordinary shares from Vivendi SE for a total consideration of approximately €684 million, at a price of €0.2975 per share, and (ii) the subsequent acquisition, on December 11, 2025, of the remaining 2.51% stake in Telecom Italia’s ordinary shares held by Vivendi. Vivendi, which had previously been Telecom Italia’s largest shareholder, thereby disposed of its remaining ordinary shares in Telecom Italia and ceased to be the company’s main investor. BlackRock has also increased its participation in Telecom Italia. In a transaction reported in a regulatory filing dated August 26, BlackRock’s aggregate interest in Telecom Italia’s ordinary shares rose above the 5% disclosure threshold, reaching approximately 5.1%, up from about 4.98% previously. In 2019, Telecom Italia delisted all of its U.S. listed securities and deregistered from the SEC, having filed Form 15F on July 9, 2019. Substantially all assets previously held by TIM Participações consisted of our shares (known, until its corporate name change in September 2017, as Intelig, and into which TIM Celular was merged in October 2018 in connection with the Reorganization, as set forth in more detail below) (incorporated in the Federative Republic of Brazil and headquarters located in the State of Rio de Janeiro On July 25, 2017, the TIM Participações S.A.’s Board of Directors approved the Reorganization, under which TIM Celular was to be merged into us. In connection with the Reorganization, Intelig was transformed by corporate act into a closely held joint stock company, and its corporate name was changed to TIM S.A. On October 31, 2018, the Reorganization was concluded and the merger of TIM Celular into us was completed, transferring all of TIM Celular’s operations to TIM S.A., and with us succeeding to all of TIM Celular’s assets, rights and liabilities. The Reorganization had the objective of capturing operational and financial synergies, through the implementation of a more efficient process structure, as well as accounting and internal control systems. This final step of the Reorganization resulted in efficiencies including: (i) tax efficiencies related to the termination of intercompany transactions; (ii) the creation of one company with combined services (fixed and mobile services) potentially resulting in a more efficient and swift response to the market’s needs, through the development of new services and integrated offers, and enabling a better strategic positioning and competitiveness as well as a better customer experience; (iii) optimization of resources and systems; and (iv) the recording by TIM Participações of an approximately R$952 million tax credit. The minutes of the Reorganization were filed with and approved by the Board of Trade of the State of São Paulo (Junta Comercial do Estado de São Paulo), in December 2018. On July 29, 2020, our Board of Directors and the Board of Directors of TIM Participações approved the Merger of TIM Participações into us, which became effective on September 28, 2020. The Merger was part of a reorganization of TIM’s corporate group. The business carried out by TIM following the Merger was the same as the business previously carried out by TIM Participações prior to the Merger. Upon the consummation of this transaction and the approval of the listing of our common shares and ADSs on B3 and NYSE, respectively, TIM Participações S.A.’s shareholders received one our shares in exchange for each share of TIM Participações that they held, in accordance with the terms of the Merger Agreement. On December 10, 2020, our Board of Directors, after reviewing certain studies, approved the establishment of a new company, FiberCo, in preparation for the future segregation of assets and the provision of residential fiber optic infrastructure services. On December 16, 2020, FiberCo was established as our wholly owned subsidiary, and on November 16, 2021, IHS acquired a 51% equity interest from us in FiberCo. As a result of the transaction, FiberCo ceased to be our wholly owned subsidiary. We now hold 49% of FiberCo’s share capital and IHS holds the remaining 51%. With the completion of the acquisition, FiberCo changed its corporate name to I-Systems. For more details on this transaction, see “Item 4. Information on the Company—A. History and Development of the Company—2023 Important Events—Completion of the transaction between IHS and I-System.” On April 20, 2022, we informed our shareholders and the market in general that we had acquired 100% of the capital stock of SPE Cozani, making it a wholly owned subsidiary. The acquisition of this company corresponds to the portion of the assets, rights and obligations of Oi Móvel that we acquired. On June 28, 2022, the shareholders’ ratified, at an extraordinary general meeting, our acquisition of shares representing 100% of the capital stock of SPE Cozani. On March 30, 2023, our shareholders approved our merger with SPE Cozani (then a wholly owned subsidiary) pursuant to which SPE Cozani would be merged into TIM S.A., subject to certain conditions, including authorization by ANATEL and the closing processes that are required under Brazilian corporate law to consummate the merger of two companies, pursuant to the Protocol and Justification of incorporation. On March 31, 2023, at a meeting of our Board of Directors, it was confirmed that the outstanding conditions for the merger of SPE Cozani had been met, with an effective date of April 1, 2023, following which date SPE Cozani was merged into us and ceased to exist as a separate legal entity. Pursuant to the merger, we succeeded SPE Cozani in respect of all of its rights and obligations. The following chart illustrates our current ownership structure as of the date of this annual report on Form 20-F: *Telecom Italia S.p.A. holds 1 (one) share of TIM brasil Serv and Part. S.A. D. Property, Plant and Equipment Our principal properties consist of radio frequencies, transmission equipment, switching exchanges and gateway equipment, which connect calls to and from customers and enables data traffic connections, and radio base stations, which comprise certain signal transmission and reception equipment covering a defined area. At our radio base station, we have also installed antennas and certain equipment to connect these antennas with our switching equipment. As of December 31, 2025 (ref. Teleco), more than 15 thousand 5G gNodes, 32 thousand eNodeB, almost 20 thousand NodeB, 18 thousand BTS and more than 132 thousand kilometers in fiber optic networks. We generally lease or buy the sites where our mobile telecommunications network equipment is installed. Over the course of 2025, we had leased approximately 68,357 square meters of real property, all of which was available for office space. We also lease approximately 28,494 square meters of stores operated by us. There are no material encumbrances that may affect our utilization of our property or equipment. All our property and equipment is owned or leased domestically, we do not own or lease any property or equipment outside Brazil.
A. Operating Results The following discussion of our financial condition and operating results should be read in conjunction with our audited financial statements as of December 31, 2025 and 2024, and for each of the three years in the period ended on December 31, 2025 included…
A. Operating Results The following discussion of our financial condition and operating results should be read in conjunction with our audited financial statements as of December 31, 2025 and 2024, and for each of the three years in the period ended on December 31, 2025 included elsewhere in this annual report that have been prepared in accordance with IFRS Accounting Standards, as issued by IASB. Brazilian Political and Economic Overview The macroeconomic environment remained challenging for our operations throughout the last three years. In 2025, Brazil’s economy faced significant headwinds: GDP growth moderated amid tighter monetary conditions and subdued domestic demand, contributing to downward revisions of economic forecasts; heightened global policy uncertainty and trade tensions, including the imposition of additional U.S. tariffs on a substantial share of Brazilian exports — which affected key sectors such as coffee, meat, sugar, wood and machinery and reduced export volumes to the United States — created uncertainty for exporters and dampened market confidence; and ongoing fiscal and policy debates over structural reforms and budgetary measures increased economic uncertainty and political friction in Brasília. In addition, rising regional geopolitical tensions — particularly between the United States and Venezuela, which heightened concerns about security and investor risk in Latin America — added further uncertainty to external demand and market confidence. See “Item 3. Key Information—D. Risk Factors—Risks Relating to Brazil—We may be impacted by volatility in the global financial markets”. Our operations and assets are located in Brazil. Accordingly, our results of operations are substantially affected by macroeconomic conditions in Brazil, including inflation rates, interest rates, Brazilian GDP growth, and employment rates, among other matters. The following table sets forth data on real GDP growth, unemployment, inflation and interest rates, and the U.S. dollar exchange rate for the indicated periods: As of and for the year ended December 31, 2025 2024 2023 GDP growth (%)(1) 2.3 3.4 3.2 Unemployment (%)(2) 5.6 6.2 7.8 Inflation (IGP-M) (%)(3) (1.05) 6.5 3.2 Inflation (IPCA) (%)(4) 4.3 4.8 4.6 CDI (%)(5) 14.90 10.9 13.0 SELIC (%)(6) 15.00 12.25 11.75 TJLP (%)(7) 9.07 7.43 6.55 (Depreciation) appreciation of the real against the U.S. dollar (%)(8) 11.4 (21.8) 9.4 Exchange rate (closing) of the real to the U.S. dollar (8) 5.5024 6.1923 4.8413 (1) Source: IBGE. (2) Source: IBGE (3) The General Market Price Index (Índice Geral de Preços do Mercado) (“IGP-M”), as measured by Fundação Getulio Vargas (“FGV”), represents data accumulated over the 12 months in each year ended December 31. Source: FGV. (4) The National Consumer Price Index (Índice Nacional de Preços ao Consumidor Amplo) (“IPCA”), as measured by IBGE, represents data accumulated over the 12 months in each year ended December 31. Source: IBGE. (5) The DI rate is the end of period interbank deposit rate in Brazil. Source: B3 S.A. – Brasil, Bolsa, Balcão. (6) This is the average adjusted rate of daily financing determined in the Special Settlement and Custody System (Sistema Especial de Liquidação e Custódia) (“SELIC”), for Brazilian federal securities (end of period). Source: Central Bank. (7) The long-term interest rate (Taxa de Juros de Longo Prazo) (“TJLP”), represents the interest rate applied by the Brazilian Development Bank (Banco Nacional de Desenvolvimento Econômico e Social) (“BNDES”), in long-term financings (end of the period). Source: BNDES. (8) Source: Central Bank, IPEADATA Sources: BNDES, Central Bank, Bloomberg, FGV, IBGE and IPEADATA The economic environment remained challenging for our operations throughout the last three years. The Brazilian GDP, as published by the IBGE, increased by 3.2%, 3.4% and 2.3% in 2023, 2024 and 2025, respectively. Prior to 2020, when the GDP grew 4.1%, Brazil was emerging from a prolonged recession after a period of a slow recovery, with only meager GDP growth in 2019 and 2018. The rate of growth of Brazilian GDP has a direct effect on consumer demand, which we believe affects demand for our products and services and, consequently, our revenue. In 2025, Brazilian inflation, as measured by the General Market Price Index (Índice Geral de Preços - Mercado), or IGP-M, published by Fundação Getúlio Vargas, or FGV, a private organization, was -1.05%, compared to 6.5% during 2024 and 3.2% during 2023. In 2025, Brazilian inflation, as measured by the Broad Consumer Price Index (Índice Nacional de Preços ao Consumidor Ampliado), or IPCA, published by the IBGE, was 4.3%, compared to 4.8% during 2024 and 4.6% during 2023. During 2025, the real increased against the U.S. dollar by 11.4%, following a depreciation of 21.8% during 2024 and an appreciation of 9.4% during 2023. The appreciation of the real against the U.S. dollar may help to keep inflationary pressures under control in Brazil. In periods of significant inflation, we may not be able to pass through our increased cost of goods to our customers and demand for our products may contract. The Brazilian Government approved a tax reform that was discussed for 30 years, and also approved a new tax framework, which brought more clarity regarding the fiscal direction. The Tax Reform was enacted on December 20, 2023 by National Congress, but it will need complementary and ordinary laws to be regulated. The transition period of the Tax Reform will begin in 2026 and is expected to come into full effect from 2033. In Europe, levels of economic activity entered a slower growth trajectory, as the war between Russia and Ukraine and the Israel-Hamas conflict, political tensions within the Eurozone and the effects of the United Kingdom formally leaving the European Union on January 31, 2020, or Brexit, continue (see “Item 3. Key Information—D. Risk Factors—Risks Relating to Brazil—We may be impacted by volatility in the global financial markets”). In the United States, it is unclear the degree to which current political divisions in the country will continue throughout the current four-year presidential term of President Biden, as well as the policies that will be adopted by the current administration and the effects of any such policies, if implemented. Impact of Inflation on Our Results of Operations In 2022, Brazil’s economic environment was relatively volatile due to the impacts of the COVID-19 pandemic, geopolitical divisions, and the Brazilian presidential election. Despite this environment, inflation fell in 2022 when compared to the previous year. After a peak in 2021, IPCA fell from a double-digit level to 5.6% by December 2022. Brazil's official inflation ended 2023 and 2024 at 4.6% and 4.8%, respectively. The rate is measured by the IPCA (Broad National Consumer Price Index). In a time of high inflation globally, the trajectory of inflation in Brazil is less worrisome when considered in comparison with certain other countries. However, having the ability to manage the impacts caused by inflation is essential in a country as volatile as Brazil. We have been able to manage those impacts in recent years due to: (i) our strong cost efficiency policy in which we implement multiple measures to control spending using digitalization initiatives, contract renegotiation, make-or-buy reviews; (ii) price readjustments to our postpaid clients, where the existing customers have their bills priced-up in a more-for-more strategy and (iii) elimination of low face value recharges, where prepaid clients are directed to higher face value top-ups when they need to recharge their credit. In 2023, 2024 and 2025, the main lines in our profit and loss impacted directly by inflation were personnel costs, rental costs, and lease costs. Those impacts were mostly offset by the aforementioned cost control measures and price increases. Critical Accounting Policies For the critical accounting policies, see our audited financial statements Results of Operations The following discussion should be read in conjunction with “Item 3. Key Information” and “Item 4. Information on the Company.” As set forth in greater detail below, our financial condition and results of operations are significantly affected by Brazilian telecommunications regulation, including the regulation of rates. See “Item 4. Information on the Company—B. Business Overview—Regulation of the Brazilian Telecommunications Industry—Wholesale Rates Regulation.” Our financial condition and results of operations have also been, and are expected to continue to be, affected by the political and economic environment in Brazil. See “Item 3. Key Information—D. Risk Factors—Risks Relating to Brazil.” The following table shows certain components of our statement of income for each year in the three-year period ended December 31, 2025, as well as the percentage change from year to year. Year ended December 31, Percentage change 2025 2024 2023 2025 - 2024 2024 - 2023 (in thousands of reais) Revenue 26,624,721 25,447,930 23,833,893 4.6 6.8 Cost of services provided and goods sold (12,266,584) (11,893,115) (11,496,437) 3.1 3.5 Gross income 14,358,137 13,554,815 12,337,456 5.9 9.9 Operating income (expenses): Selling expenses (5,959,682) (5,908,816) (5,742,642) 0.9 2.9 General and administrative expenses (1,734,484) (1,798,005) (1,759,433) (3.5) 2.2 Other income (expenses), net (212,139) (258,781) (28,779) (18.0) 799.2 Share of loss of an associate (107,800) (82,526) (89,304) 30.6 (7.6) Operating income (expenses) (8,014,105) (8,048,128) (7,620,158) (0.4) 5.6 Profit before financial income and expenses 6,344,032 5,506,687 4,717,298 15.2 16.7 Financial income (expenses): Financial income 1,629,877 861,759 1,239,753 89.1 (30.5) Financial expenses (3,350,234) (2,817,346) (2,765,961) 18.9 1.9 Foreign exchange variations (63,664) 71,363 (7,057) N.A. N.A. Financial income (expenses) (1,784,021) (1,884,224) (1,533,265) (5.3) 22.9 Profit before income tax and social contribution 4,560,011 3,622,463 3,184,033 25.9 13.8 Income tax and social contribution (248,027) (468,582) (346,611) (47.1) 35.2 Profit for the year 4,311,984 3,153,881 2,837,422 36.7 11.2 Results of Operations for the Year Ended December 31, 2025 Compared to the Year Ended December 31, 2024 Revenue Our revenue consisted of: · mobile and fixed services: (i) local and long-distance voice, (ii) data and content (value-added services), (iii) interconnection, (iv) revenue from new partnership agreements, described as “Customer Platform” (financial, education, digital security, health and advertising), and (v) other services; and · goods sold: telephones, mini-modems, tablets and other equipment. The composition of our revenue by category of service is set out in Note 27 to our financial statements and discussed below. Our revenue for the year ended December 31, 2025, was R$26,624,721 thousand, an increase of 4.6% as compared to R$25,447,930 thousand in 2024. This variation was mainly driven by a 5.4% increase in mobile services revenue (“MSR”), supported by solid postpaid performance and a stronger value proposition, reflected in a 4.6% rise in mobile average monthly revenue per user (“ARPU”) (A measure used in the mobile telecommunications industry to evaluate the revenue generated by customers. ARPU is used by our management for decision-making purposes and by our management and investors to assess our operating margin per user and consequently our overall operating performance in a given period) and a low churn rate of 3.0% (“churn”, the rate at which customers disconnect or stop using a company’s service over a given period). Our management understands that a breakdown of revenue can be helpful in an analysis of our revenue dynamics. The details of our revenue are presented below: Year ended December 31, Percentage change 2025 2024 2025 – 2024 (in thousands of reais) Total revenue 26,624,721 25,447,930 4.6 Service revenue 25,855,539 24,587,499 5.2 Service revenue – mobile 24,518,820 23,256,261 5.4 Client generated 22,961,011 21,605,375 6.3 Interconnection 345,495 348,960 (1.0) Customer platform 128,570 218,690 (41.2) Others 1,083,745 1,083,236 0.0 Service revenue – fixed 1,336,719 1,331,238 0.4 Goods sold 769,182 860,431 (10.6) Service Revenue Service revenue for the year ended December 31, 2025, was R$25,855,539 thousand, an increase of 5.2% compared to R$24,587,499 thousand in the year ended December 31, 2024. Mobile Service Revenue (“MSR”) increased 5.4%, to R$24,518,820 thousand for the year ended December 31, 2025, from R$23,256,261 thousand for the year ended December 31, 2024, mainly due to an increase in client generated revenue due to consistent performance improvements in postpaid plans. In addition, in 2025, ARPU grew 4.6% in 2025 to an ARPU of R$32.8, with a churn rate of 3.0%, confirming TIM’s commitment to enhance monetization and retain its customer base. Interconnection revenue decreased by 1.0%, to R$345,495 thousand for the year ended December 31, 2025, from R$348,960 thousand for the year ended December 31, 2024, as a result of lower incoming traffic. Customer platform revenue decreased by 41.2%, to R$128,570 thousand for the year ended December 31, 2025, from R$218,690 thousand for the year ended December 31, 2024, primarily driven by: (i) a year-over-year comparison negatively affected by revenues recognized in 2024 from the EXA partnership, whose business model is based on activation fees and equity participation and which may be subject to seasonality; and (ii) a year-over-year comparison negatively affected by the conclusion of the strategic financial services partnership in 2025. Fixed service revenue increased 0.4% to R$1,336,719 thousand in the year ended December 31, 2025, from R$1,331,238 thousand in the year ended December 31, 2024, mainly due to the Company's strategy of carrying out a more selective expansion of TIM Ultrafibra. Revenue from goods sold decreased 10.6%, to R$769.182 thousand in the year ended on December 31, 2025, from R$860,431 thousand in the year ended on December 31, 2024, mainly due to lower sales volume as the Company focused on higher-value products. Cost of Services Provided and Goods Sold and Operating Expenses Cost of services provided and goods sold and operating expenses (comprised of selling, general and administrative expenses) increased 1.8% for the year ended December 31, 2025 as compared to the year ended December 31, 2024. The following table shows the components of costs of services provided and goods sold and operating expenses (comprised of selling, general and administrative expenses) for each of the years indicated. Year ended December 31, Percentage change 2025 2024 2025 – 2024 (in thousands of reais) Personnel (1,483,685) (1,486,278) (0.2) Outsourced services (3,390,770) (3,570,851) (5.0) Interconnection and connection means (3,581,352) (3,091,741) 15.8 Depreciation and amortization (7,077,687) (7,026,035) 0.7 Taxes, fees and contributions (1,047,661) (1,092,491) (4.1) Rentals and reinsurance (797,452) (716,880) 11.2 Cost of goods sold (1,062,370) (1,104,460) (3.8) Advertising (688,991) (700,637) (1.7) Losses on doubtful accounts (765,783) (693,122) 10.5 Others (64,999) (117,441) (44.7) Total (19,960,750) (19,599,936) 1.8 Personnel Personnel costs and expenses remained broadly stable year-over-year, totaling R$1,483,685 thousand in the year ended December 31, 2025, compared to R$1,486,278 thousand in the year ended December 31, 2024. Outsourced Services Outsourced services costs and expenses decreased by 5.0% to R$3,390,770 thousand in the year ended December 31, 2025, as compared to R$3,570,851 thousand in the year ended December 31, 2024, primarily due to reduced customer service costs. Interconnection and Connection Means Our costs for interconnection and connection means increased 15.8%, to R$3,581,352 thousand in the year ended December 31, 2025, from R$3,091,741 thousand in the year ended December 31, 2024. This increase is mainly due to (i) higher expenses related to international roaming services; and (ii) higher expenses related to content providers in service plans Depreciation and Amortization Depreciation and amortization costs and expenses increased 0.7%, to R$7,077,687 thousand in the year ended December 31, 2025, from R$7,026,035 thousand in the year ended December 31, 2024. This variation was mainly explained by higher depreciation of transmission equipment and increased amortization of software. Taxes, Fees and Contributions Taxes, fees and contributions costs and expenses decreased 4.1%, to R$1,047,661 thousand in the year ended December 31, 2025 from R$1,092,491 thousand in the year ended December 31, 2024. The decrease was supported by the taxes linked to cost of services rendered and goods sold, see “Item 4. Information on the Company—B. Business Overview—Taxes on Telecommunications Goods and Services.” Rentals and Reinsurance Rentals and reinsurance costs and expenses increased 11.2%, to R$797,452 thousand in the year ended December 31, 2025, from R$716,880 thousand in the year ended December 31, 2024. This increase is mainly related to higher costs with real estate rental. Cost of Goods Sold Our cost of goods sold decreased 3.8%, to R$1,062,370 thousand in the year ended December 31, 2025, from R$1,104,460 thousand in the year ended December 31, 2024. This decrease is consistent with the reduction in goods sold revenue, mainly driven by lower sales volume. Advertising Advertising expenses decreased 1.7%, to R$688,991 thousand in the year ended December 31, 2025 from R$700,637 thousand in the year ended December 31, 2024. This decrease was primarily driven by lower marketing expenses compared to 2024, as the prior year included expenses associated with TIM’s official sponsorship of the Rock in Rio event. Losses on Doubtful Accounts Losses on doubtful accounts increased 10.5%, to R$765,783 thousand at the year ended December 31, 2025, from R$693,122 thousand in the year ended December 31, 2024. This increase was mainly driven by the expansion of our postpaid customer base, resulting in greater exposure to delinquency. Others Others decreased 44.1%, to an expense of R$64,999 thousand in the year ended December 31, 2025, from an expense of R$117,441 thousand in the year ended December 31, 2024. This decrease is mainly explained by a reduction in fines paid compared to the previous year. Other Income (Expenses), Net Other income (expenses), net, decreased 18.0%, to an expense of R$212,139 thousand in the year ended December 31, 2025, from an expense of R$258,781 thousand in the year ended December 31, 2024. This decrease is mainly explained by a reduction in civil and regulatory contingency provisions. Profit for the Year The following table shows our profit for the year, as well as the percentage change, for each of the periods indicated: Year ended December 31, Percentage change 2025 2024 2025 – 2024 (in thousands of reais) Profit before financial income (expenses) and income taxes 6,344,032 5,506,687 15.2 Financial income (expenses) (1,784,021) (1,884,224) (5.3) Income tax and social contribution (248,027) (468,582) (47.1) Profit for the year 4,311,984 3,153,881 36.7 Financial Income (Expenses) Net financial expenses decreased 5.3% in the year ended December 31, 2025, to an expense of R$1,784,021 thousand, from an expense of R$1,884,224 thousand in the year ended December 31, 2024. This decrease is mainly explained by: (i) higher yields from financial investments, supported by a more robust cash position and the increase in the interest rate over the past 12 months;; and (ii) financial revenue from the appreciation of the 5G Fund, an investment fund, created by TIM in partnership with Upload Ventures Growth, LP – an independent venture capital manager –, focused on solutions based on 5G technology Income Tax and Social Contribution Income tax and social contribution decreased 47.1% in the year ended December 31, 2025, to R$248,027 thousand, as compared to R$468,582 thousand in the year ended December 31, 2024. This variation is explained by: (i) higher volume of interest on equity recognized in 2025; and (ii) an increase in tax benefits. The effective tax rate also decreased to approximately 5% in 2025 compared to 13% in 2024. Profit for the Year As a consequence of the explanations above, our profit for the year ended December 31, 2025 was R$4,311,984 thousand representing an increase of 36.7% from our profit of R$3,153,881 thousand for the year ended December 31, 2024. Results of Operations for the Year Ended December 31, 2024 Compared to the Year Ended December 31, 2023 For a discussion of our results of operations for the year ended December 31, 2024 compared to the year ended December 31, 2023, please see “Item 5. Operating and Financial Review and Prospects—A. Operating Results— Results of Operations for the Year Ended December 31, 2024 Compared to the Year Ended December 31, 2023” of our annual report on Form 20-F for the year ended December 31, 2024. Non-GAAP Financial Measures for the Years Ended December 31, 2025, 2024 and 2023 Year ended December 31, 2025 2025 2024 2023 (in thousand of US$)(1) (in thousands of R$) Net Debt(2) 1,843,052 10,141,213 8,999,341 10,187,261 Adjusted Net Debt(3) 2,019,535 11,112,294 10,512,938 11,642,314 EBITDA(4) 2,439,284 13,421,918 12,532,722 11,834,327 Adjusted EBITDA(5) 2,458,840 13,529,521 12,625,248 11,620,197 (1) Solely for the convenience of the reader, certain Brazilian real amounts have been translated into U.S. dollars at the selling rate of R$5.5024 to US$1.00, as reported by the Central Bank as of December 31, 2025. The U.S. dollar equivalent information presented in this annual report should not be construed as implying that the amounts in reais represent, or could have been or could be converted into, U.S. dollars at this rate or any other rate. (2) We calculate Net Debt as total loans and derivatives plus lease liabilities minus lease assets, cash and cash equivalents and FIC (Investment Fund). For a reconciliation of Net Debt to the most directly comparable IFRS measure, see “-Reconciliation of Non-GAAP Financial Measures-Reconciliation of Net Debt and Adjusted Net Debt.” (3) We calculate Adjusted Net Debt as Net Debt plus certain derivatives entered into for share subscription options and the financing entered into for the acquisition of 5G licenses. For a reconciliation of Adjusted Net Debt to the most directly comparable IFRS measure, see “-Reconciliation of Non-GAAP Financial Measures-Reconciliation of Net Debt and Adjusted Net Debt.” (4) We calculate EBITDA as net profit for the year plus net financial income (expense), income tax and social contribution and depreciation and amortization costs and expenses. For a reconciliation of EBITDA to Adjusted EBITDA, see “-Reconciliation of Non-GAAP Financial Measures-Reconciliation of EBITDA and Adjusted EBITDA.” (5) We calculate Adjusted EBITDA as EBITDA as adjusted for (i) equity in earnings and (ii) Non-recurring Income/Expenses. For a reconciliation of Adjusted EBITDA to the most directly comparable IFRS measure, see “Operating and Financial Review and Prospects—Reconciliation of Non-GAAP Financial Measures—Reconciliation of EBITDA and Adjusted EBITDA.” Reconciliation of Non-GAAP Financial Measures This annual report presents certain non-GAAP financial measures, which are not recognized under IFRS, specifically Net Debt, Adjusted Net Debt, EBITDA and Adjusted EBITDA. These non-GAAP financial measures are used by our management for decision-making purposes and to assess our financial and operating performance, financial position, liquidity and to make strategic decisions regarding the allocation of capital. For additional information on our Non-GAAP measures see “Presentation of Financial and Other Information—Special Note Regarding Non-GAAP Financial Measures.” Reconciliation of Net Debt and Adjusted Net Debt Year ended December 31, 2025 2025 2024 2023 (in thousands of US$) (1) (in thousands of R$) Total loans and derivatives 453,480 2,495,231 2,357,066 3,203,248 (+) Leases - Liabilities(2) 2,501,611 13,764,868 12,575,846 12,256,775 (-) Leases - Assets(3) 42,571 234,246 240,387 236,341 (-) Cash, Cash Equivalents 656,136 3,610,324 3,258,743 3,077,931 (-) FIC (Investment Fund)(4) 413,331 2,274,316 2,434,441 1,958,490 Net Debt(5) 1,843,052 10,141,213 8,999,341 10,187,261 (+) Other Derivatives(6) — — 522,822 502,453 (+) Financing of 5G Licenses(7) 176,483 971,081 990,775 952,600 Adjusted Net Debt(8) 2,019,535 11,112,294 10,512,938 11,642,314 (1) Solely for the convenience of the reader, certain Brazilian real amounts have been translated into U.S. dollars at the selling rate of R$5.5024 to US$1.00, as reported by the Central Bank as of December 31, 2025. The U.S. dollar equivalent information presented in this annual report should not be construed as implying that the amounts in reais represent, or could have been or could be converted into, U.S. dollars at this rate or any other rate. (2) Lease – Liabilities corresponds to the Company´s consideration for the right-of-use of the leased asset under the lease agreements under which the Company is the lessee. The amount of each agreement is accounted for at the lease’s commencement at the lower of the fair value of the leased asset and the present value of payments provided for in lease agreement. For more information, see note 17 to the financial statements. (3) Leases under which the Company, as a lessor, transfers substantially all the risks and rewards of ownership to the other party (lessee) are classified as finance leases. These leases are recorded as a lease receivable at the lower of the fair value of the leased item and/or the present value of the receivables provided for in the agreement. Interest related to the lease is recorded as financial revenue over the contractual term. For more information, see note 17 to the financial statements. (4) Comprises financial assets measured at fair value through profit or loss. For more information, see note 12 to the financial statements. (5) We calculate Net Debt as total loans and derivatives plus lease liabilities minus lease assets, cash and cash equivalents and FIC (Investment Fund). For further information on Net Debt, see “Presentation of Financial and Other Information—Special Note Regarding Non-GAAP Financial Measures—Net Debt and Adjusted Net Debt.” (6)Other derivatives entered into for share subscription options. (7)In 2021, TIM acquired 5G licenses through the Anatel auction, resulting in the recognition of an intangible asset corresponding to the licenses, as well as the associated obligations that we entered into to pay for such licenses. The payment for the licenses is scheduled to occur over a period ranging from 10 to 20 years, while payments related to the associated obligations were made between 2022 and 2024(8)We calculate Adjusted Net Debt as Net Debt plus certain derivatives entered into for share subscription options and the financing entered into for the acquisition of 5G licenses. For further information on Adjusted Net Debt, see “Presentation of Financial and Other Information—Special Note Regarding Non-GAAP Financial Measures—Net Debt and Adjusted Net Debt.” Reconciliation of EBITDA and Adjusted EBITDA Year ended December 31, 2025 2025 2024 2023 (in thousands of US$) (1) (in thousands of R$) Net profit for the year 783,655 4,311,984 3,153,881 2,837,422 (+)Finance income (expenses), net 324,225 1,784,021 1,884,224 1,533,265 (+)Income tax and social contribution 45,076 248,027 468,582 346,611 (+)Depreciation and amortization 1,286,290 7,077,687 7,026,035 7,117,029 EBITDA(2) 2,439,248 13,421,719 12,532,722 11,834,327 (+)Equity in Earnings(3) 19,591 107,800 82,526 89,304 Non recurring Income/Expenses(4) — — — (303,435) Adjusted EBITDA(5) 2,458,840 13,529,521 12,615,248 11,620,197 (1) Solely for the convenience of the reader, certain Brazilian real amounts have been translated into U.S. dollars at the selling rate of R$5.5024 to US$1.00, as reported by the Central Bank as of December 31, 2025. The U.S. dollar equivalent information presented in this annual report should not be construed as implying that the amounts in reais represent, or could have been or could be converted into, U.S. dollars at this rate or any other rate. (2) We calculate EBITDA as net profit for the year plus net financial income (expense), income tax and social contribution and depreciation and amortization costs and expenses. For further information on EBITDA, “Presentation of Financial and Other Information—Special Note Regarding Non-GAAP Financial Measures—EBITDA and Adjusted EBITDA.” (3) The adjustment for equity in earnings corresponds to our 49% ownership interest in the loss of I-Systems (formerly Fiber Co), which we account for using the equity accounting method. For more information about the share of loss of such associate, see Note 14 to the financial statements. (4) The adjustment for non-recurring revenues/expenses in 2023 corresponds to the net profit recorded as a result of the post-closing price adjustment related to our acquisition of certain assets of Oi Móvel. (5) We calculate Adjusted EBITDA as EBITDA as adjusted for (i) equity in earnings and (ii) non-recurring Revenue/Expense. For further information on Adjusted EBITDA, see “Presentation of Financial and Other Information—Special Note Regarding Non-GAAP Financial Measures—EBITDA and Adjusted EBITDA.” B. Liquidity and Capital Resources The main source of our liquidity for net working capital and investment is operating cash flow, complemented by short-term credit lines with local and international banks and long-term financing with national and international development agencies. The cost of our debts has been significantly reducing in terms of CDI, due to the expiration of certain contracts with higher rates and the disbursement of new credit lines with rates below market cost, despite the adverse macroeconomic scenario in Brazil, particularly the recent increase of Brazil’s base interest rate. In May 2024, we disbursed part of a credit line with Banco do Nordeste do Brasil S.A. in an amount of R$386.9 million and an average post-hedge cost of 56.82% of CDI and a term of two years. In July 2024, we disbursed part of a credit line with Banco do Nordeste do Brasil S.A in an amount of R$116.4 million and an average post-hedge cost of 56.75% of CDI and a term of two years. As of December 31, 2025, we have sufficient working capital to service our operating activities and ongoing investments. Sources of Funds Year Ended December 31, 2025 Compared to Year Ended December 31, 2024 Operating Activities Cash flows generated in our operating activities increased by 9.0% in 2025, to R$13,440,069 thousand from R$12,331,543 thousand in 2024. This increase was primarily driven by reductions in trade accounts receivable and recoverable taxes. Investing Activities Cash flows used in investing activities decreased to R$3,560,621 thousand in 2025 from R$4,953,872 thousand in 2024, primarily due to redemptions of marketable securities. Financing Activities Cash flows used in our financing activities increased to R$9,527,867 thousand in 2025 from R$7,196,859 thousand in 2024, mainly due to an increase in dividends and interest on shareholder's equity paid. Year Ended December 31, 2024 Compared to Year Ended December 31, 2023 For a discussion of our sources of funds for the year ended December 31, 2024 compared to the year ended December 31, 2023, please see “Item 5. Operating and Financial Review and Prospects—B. Liquidity and Capital Resources—Sources of Funds—Year Ended December 31, 2024 Compared to Year Ended December 31, 2023” of our annual report on Form 20-F for the year ended December 31, 2024. Financial Contracts We are party to the financial contracts described below, each to be used for purposes of the development of our business, generally, unless otherwise expressly provided herein. In the case of loans linked to the IPCA we enter into rate swaps to hedge against inflation variations. As set forth below and as each agreement is described further in the following paragraph, in 2025, we did not obtain any new loans. The terms of our long-term debt contain cross-default clauses, restrictions on our ability to merge with another entity, restrictions on our ability to prematurely redeem or repay such debt and restrictions on sales and exchanges of assets. They also contain various financial ratio covenants. We are currently not, and do not expect to be, in breach of any covenant of our debt instruments, which breach would be construed an event of default under their terms. As mentioned above, our principal financing agreements are: · Credit Agreement, dated March 20, 2019, between Agência Especial de Financiamento Industrial S.A., or FINAME, an entity within the BNDES system, as lender and TIM S.A. as borrower, in the principal amount of R$390 million for exclusive use in the acquisition of new machines, equipment, industrial systems, components and automation and computing goods of national manufacture, accredited by the Computerized Supplier Accreditation (Credenciamento de Fornecedor Informatizado), or CFI, of the BNDES system. The new agreement replaces one of the sub-credits (Credit Line B) of the existing 2018 BNDES Facility with better interest rate and maturity conditions: a fixed interest rate up to 1.44% plus the TLP and maturity up to 10 years. There were no additional costs to sign this loan and was fully disbursed in November 2021. As of December 31, 2025, the total outstanding amount under this credit agreement was R$329.6 million. · Credit Agreement, dated as of January 31, 2020, between Banco do Nordeste do Brasil S.A. as lender and TIM S.A., as borrower, in the principal amount of R$752.5 million, secured by a bank guarantee and receivables. The agreement has a total term of eight years, with three years of grace period and five years of amortization period, with the use of proceeds for our capital expenditures plan for the next three years (2020-2022) in the northeastern region of Brazil pursuant to certain standard FINAME requirements, as described in the agreement. The credit line is divided in two tranches: (i) a R$325 million tranche at IPCA plus 1.44% per year or IPCA plus 1.22%, considering a 15% compliance bonus; and (ii) a R$427 million tranche at IPCA plus 1.76% per year or IPCA plus 1.48%, considering a 15% compliance bonus. On May 10, 2022, the disbursement of part of this credit line occurred with an amount of R$249.1 million and an average post-hedge cost of 69.02% of CDI and a term of 5.9 years. In May 2024, the disbursement of part of this credit line occurred with an amount of R$386.9 million and an average post-hedge cost of 56.82% of CDI and a term of 2 years. In July 2024, the disbursement of part of this credit line occurred with an amount of R$116.4 million and an average post-hedge cost of 56,75% of CDI and a term of 2 years. As of December 31, 2025, the total outstanding amount under this credit agreement was R$400.0 million. · Deed of Indenture for the Issuance of Simple Unsubordinated Debentures, Not Convertible into Shares, in a Single Series, for Public Placement with Limited Efforts of the Second Issuance of TIM S.A. (“Instrumento Particular de Escritura de Emissão de Debêntures Simples, da Espécie Quirografária com Garantia Adicional Fidejussória, não Conversíveis em Ações, em Série Única, para Distribuição Pública com Esforços Restritos da Segunda Emissão da Tim S.A.”), dated as of June 15, 2021, between TIM S.A., as issuer, Pentágono Distribuidora de Títulos e Valores Mobiliários S.A., as fiduciary agent. The total amount of the issuance was R$1.6 billion through the issuance of 1,600,000 debentures each with a nominal value of R$1,000 on the issuance date and in a single series. The debentures are non-convertible and unsubordinated. For all legal purposes, the issuance date is June 15, 2021, and the term of the debentures is of 7 years as from the issuance date, or June 16, 2028, and cost post hedge of CDI + 0.95% per year. As of December 31, 2025, the total outstanding amount under this credit agreement was R$2,049.2 million. This issue is a sustainability-linked title, in reliance on Brazilian Law No. 12,431, and we used the net proceeds of this issuance to finance our capital expenditure for the 2020-23 period. See Note 20 to our financial statements for a further description of such financing agreements. The following financial contracts were disclosed in our annual report filed on Form 20-F with the Securities and Exchange Commission on March 31, 2025, all of which have since matured and been repaid or have been prepaid by us: · Credit Agreement, dated as of May 2, 2018, between BNDES as lender and TIM Celular (now TIM S.A.) as borrower (the “2018 BNDES Facility”), in the principal amount of R$1,500 million. The agreement, involves three credit lines with equal conditions of interest rates and tenors: (1) Credit Line A, in an amount of R$1,090 million, with a fixed interest rate of 1.95% plus the TJLP and eight years tenor; (2) Credit Line B, in an amount of R$390 million, with a fixed interest rate of 1.95% plus the TJLP and eight years tenor; and (3) Credit Line C, in an amount of R$20 million, with a fixed interest rate of 1.95% plus the TJLP and eight years tenor. Each credit line is to be used for specific purposes as set forth in the Credit Agreement and there were no disbursements between 2019 and 2021. In March 2019, Credit Line B was canceled and replaced by FINAME DIRETO (as defined below at next bullet). · Loan Agreement, dated as of December 23, 2015, between Finnish Export Credit as lender, KfW IPEX as facility agent and TIM Celular (which has been merged into us in connection with the Reorganization), as borrower, in the principal amount of U.S.$150 million. The new Loan Agreement is divided in three tranches of up to U.S.$50 million to be disbursed in 2016, 2017 and 2018. There are no material restrictions on our ability to transfer funds to us in the form of cash dividends, loans or advances. Uses of Funds Our principal uses of funds during the three-year period ended December 31, 2025, were payment of dividends to our shareholders, capital expenditures, business combination and loan repayments. Material Capital Expenditures Our capital expenditures in 2025, 2024 and 2023 related primarily to: (i) developing our fiber optic network, (ii) deployment and expansion of the capacity of our 3G and 4G networks, (iii) expanding network capacity, geographic coverage and digitalization, (iv) maintenance of our networks and IT systems, (v) of equipment purchases relating to our migration to PCS operations, and (vi) developing new operational and information technology systems. The following table contains a breakdown of our investments in long-lived assets for the years ended on December 31, 2025, 2024 and 2023: Capital Expenditures Categories Year ended December 31, 2025 2024 2023 (in thousands of reais) Network 3,188,352 3,168,810 3,120,320 Information technology 805,335 893,113 779,833 Licenses 44,327 63,915 56,042 Other 503,556 425,261 548,119 Total capital expenditures(1) 4,541,495 4,550,378 4,504,314 (1) The material capital expenditures discussed in this section are recurring and operational in nature and exclude non-recurring capital expenditures, like expenditures in relation to the acquisition of certain assets from Oi Móvel. Capital expenditures totaled R$4,541 million in 2025, a slight decrease of 0.2% when compared to R$4,550 million in 2024, thereby reflecting annual stability and remaining consistent with the Company’s strategic goals. See “Item 4. Information on the Company—A. History and Development of the Company—Capital Expenditures.” Dividends Our dividends are calculated in accordance with our By-laws and Brazilian corporate law. Under our By-laws, we are required to distribute an aggregate amount equal to at least 25% of our adjusted net income to our shareholders, either as dividends or as tax-deductible interest on shareholders’ equity, each year ended December 31, if there are funds available for distribution. For the purposes of the Brazilian corporate law and in accordance with our By-laws, “adjusted net income” is the amount equal to the net profit adjusted to reflect allocations to or from: (1) the legal reserve, and (2) a contingency reserve for probable losses, if applicable. The following table contains a breakdown of the dividends and interest on shareholders’ equity paid (net of income taxes) by us to our shareholders during the years ended December 31, 2025, 2024 and 2023: Dividend Distribution Year ended December 31, 2025 2024 2023 (in thousands of reais) Dividends 1,790,000 2,050,000 1,310,000 Interest on shareholders’ equity (net of withholding tax) 2,210,000 1,450,000 1,600,000 Total distributions 4,000,000 3,500,000 2,910,000 Our Board of Directors approved the distribution of an aggregate of R$2,210 million as interest on shareholders’ equity surpassing the minimum required by Brazilian Law, with respect to our 2025 results. The amounts of dividends indicated in the table above for 2023 and 2024 were approved at the annual general meeting in 2024 and 2025, respectively. The amount of withholding taxes was R$331,5 million, during 2025. The amounts paid were R$820 million in 2025 and R$1,390 million in 2026 as of the date of this annual report. Additional dividends for the 2025 fiscal year, in the amount of R$1.790 billion, were also approved and paid in 2025. Moreover, on December 16, 2025, our Board of Directors approved the payment of R$420 million as interest on equity to be paid up to June 30, 2026. Funding and Treasury Policies We maintain a general policy of continually monitoring our financial position and treasury activities to ensure solid cost and expenditure control. In accordance with our funding and treasury policy, we will continue to monitor the market to take advantage of suitable instruments to finance our industrial Plan. We expect future financing to balance maturity, cost and TIM’s payment capacity. Leverage Management tracks the ratio of Net Debt to EBITDA, which we refer to as the financial leverage index, to monitor the sustainability of our debt levels and our ability to take on additional debt. The ratio is a common credit analysis metric in the telecommunications industry and shows approximately how many years it would take to pay back our indebtedness, assuming no new debt is taken on, EBITDA remains constant, and all cash and cash equivalents may be used to repay debt. In addition, we believe that the ability to take on additional debt is a critical factor that affects our success, as indebtedness may be required to make investments necessary to grow our business. We believe that our current financial leverage index, Net Debt to EBITDA, reflects conservative leverage levels and the ability to incur additional debt if needed for extraordinary investment. Investors should be cautious in comparing our financial leverage index to that of other companies that report a similar ratio of debt to EBITDA because EBITDA may be calculated differently from company to company, leading to financial leverage indexes that are not comparable. Accordingly, any such comparison may be misleading. The following table sets forth our financial leverage index for the reported periods: 2025 2024 2023 (in thousands of reais) Net Debt (non-GAAP) (unaudited)(1) 10,141,213 8,999,341 10,187,261 EBITDA (non-GAAP) (unaudited)(2) 13,421,719 12,532,722 11,834,327 Financial leverage index (non-GAAP) (unaudited)(3) 0,75 0.72 0.86 (1) We calculate Net Debt as total loans and derivatives plus lease liabilities minus lease assets minus cash and cash equivalents minus FIC (Investment Fund). (2) We calculate EBITDA as net profit for the year plus net financial income (expense), income tax and social contribution and depreciation and amortization costs and expenses. (3) We calculate the financial leverage index as Net Debt/EBITDA. Tabular Disclosure of Contractual Obligations The following is a summary of our contractual obligations (in present value) as of December 31, 2025: Payments Due by Period as of December 31, 2025 Less than 1 year 1-3 years 4-5 years More than 5 years Total (in thousands of reais) Total borrowings (post-hedge)(1) 642 1,691 111 51 2,495 Leases – IFRS 16(2) 1,508 3,020 2,363 4,747 11,639 Leasing (previous IAS 17 finance leases) 160 289 333 1,109 1,892 Total(3) 2,311 5,000 2,808 5,907 16,026 (1) Considering the balances related to derivative financial instruments as of December 31, 2025. (2) Leases in which we, as the lessee, substantially hold all the risks and benefits of ownership are capitalized at the beginning of the lease at the lower of the fair value of the leased item and the present value of the payments provided for in the agreement. Interest related to the leases is taken to statement of income as financial expense over the term of the contract. (3) Other than as set forth herein (see, for example, “Item 4. Information on the Company—B. Business Overview—Our Business”), we have no capital lease obligations, unconditional purchase obligations, or other long-term liabilities reflected on our balance sheet of our financial statements. Interest is not included in long-term debt since it is subject to variable interest. Contingent Pension Liabilities Until December 1999, we participated in a multi-employer defined benefit plan, or the Telebrás Pension Plan, that covered the employees of the Telebrás System who retired before the breakup of Telebrás in May 1998 as well as those who continued working for the operating companies after May 1998. We are contingently liable, jointly and severally, with the other New Holding Companies, for the unfunded obligations of the Telebrás Pension Plan concerning all such employees who retired before January 30, 2000. In December 1999, we changed to a defined benefit plan, or the PBS Plan, that covers only those former employees of Telebrás who continued to be employed by us after December 1999. In November 2002, we created a separate defined contribution plan, or the TIMPREV Pension Plan. Migration to this plan was optional for employees linked to the PBS Plan. Migration to the TIMPREV Pension Plan extinguishes the migrating participant’s rights under the PBS Plan. SISTEL and TIMPREV. We and TIM Celular (which merged into TIM S.A. in connection with the Reorganization) have sponsored a privately defined benefit pension plan for a group of Telebrás system’s former employees, which is managed by Fundação Sistel de Seguridade Social – SISTEL, as a consequence of the legal provisions applicable to the privatization process of these companies in July 1998. Given that in 1999 and 2000 the sponsors of the pension plans managed by SISTEL had already negotiated conditions for the creation of individual pension plans for each sponsoring company and the maintenance of joint liability only to the participants already assisted on January 31, 2000, we, like other companies, created in 2022, as a result of the former Telebrás system, the TIMPREV Pension Plan, a defined contribution pension plan meeting the most modern social security standards adopted by private companies, and enabling migration to this plan of the employee groups linked to SISTEL.On November 13, 2002, the Brazilian Secretariat for Supplementary Pension Plans, through official ruling CGAJ/SPC No. 1917, approved the statutes of the new pension plan, or hereafter the Statutes of the TIMPREV Benefits Plan, as a defined contribution plan, which provide for new conditions for granting and maintaining benefits, as well as the rights and obligations of the Plan Managing Entity, the sponsoring companies, participants and the beneficiaries thereof. Under this new plan, the sponsor’s regular contribution will correspond to 100% of a participant’s basic contribution, and TIMPREV’s managing entity will ensure the benefits listed below, under the terms and conditions agreed upon, with no obligation to grant any other benefits, even if the government-sponsored social security entity starts granting them: · Normal retirement pension; · Early retirement pension; · Disability pension; · Deferred proportional benefit; and · Death benefit. However, as not all of our employees have migrated to TIMPREV, the pension and health care plans deriving from the TELEBRÁS system listed below remain in force: PBS: defined benefits plan of SISTEL, which includes active employees who participated in the plans sponsored by the companies of the former TELEBRÁS system; PBS Assistidos: a multi-sponsored pension plan for inactive employees; Convênio de Administração: for managing pension payments to retirees and pensioners of the predecessors of the subsidiary companies; and PAMEC/Apólice de Ativos: health care plan for pensioners of the predecessors of the subsidiary companies. As happened with the Termo de Relação Contratual Atípica (“TRCA Plan”), we had understood, until December 31, 2010 that we were responsible for liabilities of PAMEC participants (health care plan) related to us. We have changed its position based on a revised legal construction of its internal and external lawyers. As a result, the liabilities previously recorded were written off. Under with the rules established by NBC TG 33 (R2) - Benefícios a Empregados (IAS 19 – Employee Benefits) issued by the Federal Accounting Council - CFC and approved by CVM Deliberation 695/2012, after revoked by CVM Resolution 110/2022 (CVM Resolution 110/2022), the plans having a surplus are not recorded by us, as it is impossible to recover these amounts. Furthermore, the amounts of contributions will not be reduced for future sponsors. On January 29, 2007, and April 9, 2007, through the Brazilian Secretariat for Supplementary Pension Plans- SPC, the Ministry of Social Security approved the transfer of the management of the PBS–Tele CelularSul, TIM PrevSul, PBT–TIM, Convênio de Administração, PBS–Telenordeste Celular and TIM PrevNordeste benefit plans (according to SPC/DETEC/CGAT Communications Nos. 169, 167, 168, 912, 171 and 170, respectively) from SISTEL to HSBC – Fundo de Pensão. The PBS Assistidos plan continues to be managed by SISTEL. The only exception is Plano PAMEC, which was extinguished, with us remaining responsible for coverage of the respective benefit, now called PAMEC/Apólice de Ativos. In addition to the plans coming from the TELEBRÁS system, there is also the plan administered by the CESP foundation resulting from the acquisition of AES Atimus. AES Telecom: Supplementary pension and pension plan’s installment, administered by the CESP Foundation, which is the responsibility of the company, with a view to the acquisition of Eletropaulo Telecomunicações Ltda. (“AES Atimus”), succeeded by TIM Fiber SP LTDA, later merged into TIM Celular which merged into us. Medical care plan Fiber: Provision for maintenance of health plan as post-employment benefit to former employees of AES Atimus (as established in Law No. 9,656/98, articles 30 and 31), which was merged into TIM Celular, which in turn was subsequently merged into us. In 2025, contributions to the pension plans mentioned above remained stable at R$1.0 million, consistent with the amount contributed in 2024 and slightly lower than the R$1.1 million contributed in 2023. C. Research and Development Research and Development We do not independently develop new telecommunications hardware and depend upon the manufacturers of telecommunications products for the development of new hardware. Patents and Licenses We hold no material intellectual property assets. Telecom Italia owns the rights to the “TIM” trade name, which is currently licensed to us. See “Item 3. Key Information—D. Risk Factors—Risks Relating to Our Business—Any modification or termination of our ability to use the “TIM” trade name may adversely affect our business and operating results.” D. Trend Information Customer Base and Market Share In the year ended December 31, 2025, our mobile subscriber base decreased by 0.1% to 62.0 million customers, compared to 62.1 million customers in 2024, reflecting a growth by 8.4% in the Postpaid customer base, and a decline by 8.3% in the Prepaid customer base. Related to the composition of our customer base, the Postpaid accounted for 53% of our total subscriber base in the year ended December 31, 2025, compared to 49% in 2024. The prepaid represents 47% of our customer base at the end of 2025, compared to 51% in 2024. Although no assurances can be given as to the size of our subscriber base and market share in the future, we intend to focus on maintaining and improving our strong position in the mobile and fixed telecommunications market in Brazil. Our strategies for doing so are outlined in more detail in “Item 4. Information on the Company—B. Business Overview—Our Strategy.” Trends in Sales and Prices We managed to maintain a good level of annual growth in service revenue, and we will continue to monetize our customer base using the strategy of “more for more” and focus on the development of all of our business lines. Among the initiatives put in place in 2023 that supported this performance, the following stand out the most: (i) the ongoing evolution of the volume-to-value approach, maintaining a high level of ARPU and upselling to our customer base; (ii) expansion of the network, consolidating TIM as having the largest mobile coverage in Brazil with the launch of 5G, which was made available in all of Brazil’s state capitals in 2023, and maintaining leadership in 4G; (iii) the solid execution of our ultra-broadband operation, with the rebranding of the service (TIM UltraFibra) and the expansion of fiber; (iv) the continuous advancement of our network and IT infrastructure; (v) the incessant pursuit for cost and investment efficiencies despite the scenario of high inflation in the first half of 2023; and (vi) the ongoing evolution of our customer platform strategy, materialized by partnerships in different verticals such as financial services, digital education, digital security and mobile advertising. In 2024 we consolidated our existing partnerships and planned for potential future ones. We continued to expand our network and IT infrastructure while pursuing cost and investment efficiencies despite the higher inflation scenario in the second half of 2024. In 2025, we reaffirmed our partnership strategy and, in our updated strategic plan, outlined a framework to monetize our existing customer base beyond core telecommunications through an expanded, partnership-driven ecosystem. During the year, we continued to expand our network and IT infrastructure while pursuing operating and capital efficiencies, despite the persistently high interest-rate environment in Brazil. Under our PCS authorizations, we are allowed to set prices for our service plans, subject to approval by ANATEL, provided that such amounts do not exceed a specified inflation adjusted cap. We expect that the adjustment of our prices will follow the market trend. The rates for our service plans, as well as a description of the main features of such plans, are set out in “Item 4. Information on the Company—B. Business Overview—Mobile Service Rates and Plans.” Average Monthly Revenue Per User (“ARPU”) ARPU is a measure used in the mobile telecommunications industry to evaluate the revenue generated by customers. ARPU is used by our management for decision-making purposes and by our management and investors to assess our operating margin per user and consequently our overall operating performance in a given period. Mobile ARPU (Average Monthly Revenue Per User) was R$32.8 for the year ended December 31, 2025, reflecting an increase of 4.6% as compared to the year ended December 31, 2024, which was R$31.4. This result shows TIM’s focus on seeking greater monetization of its customer base in line with its strategy. The ARPU of the Mobile segment, which excludes other mobile revenues and revenue generated by the Customer Platform, increased (i) by 4.3% YoY (2025:R$55.0 x 2024:R$52.7) in the Postpaid ex-M2M, having as its main driver a more rational environment, and decreased (ii) by 2.8% YoY (2025: R$14.4 x 2024: R$14.8) in the Prepaid. The result was supported by: (i) the continued focus on migrating the customer base to higher-value plans; (ii) churn levels under control, which remained practically stable throughout the year and (iii) the annual price adjustments. We understand that the ARPU is a relevant profitability metric that allows comparability with other peers in the telecommunication sector, calculated by dividing mobile services revenues by the average monthly customer base. Competitive Environment Brazil’s mobile telecommunications market is mature and remains highly competitive, shaped in recent years by the nationwide rollout of 5G and by the sector’s structural reconfiguration following the acquisition and integration of Oi Móvel’s mobile assets by TIM, Vivo and Claro. The acquisition of a portion of Oi Móvel’s mobile assets reinforced our strategic objective of supporting a more balanced and sustainable competitive market structure. It also enabled improvements in service quality and customer experience, more efficient asset utilization, portfolio optimization, accelerated technological innovation and the capture of operational synergies, while maintaining a disciplined approach to capital allocation and shareholder value creation. Technological evolution continues to influence competitive dynamics in the Brazilian telecommunications sector. The ongoing adoption of 5G, which has exceeded certain initial regulatory rollout milestones and, based on third-party industry projections, may become the predominant mobile technology over the course of this decade, could introduce additional sources of competition. This evolution may result in changes to market structure and competitive behavior and create opportunities for monetization, service differentiation and innovation. However, the extent and timing of any such opportunities remain subject to market conditions, regulatory developments, competitive responses and customer adoption patterns. Since the last spectrum auction conducted by ANATEL in November 2021, which awarded licenses across multiple frequency bands for 20-year terms, competition has intensified not only among the three national mobile operators but also through the presence of established regional providers, such as Algar Telecom and Sercomtel, as well as newer entrants that have launched 5G services in recent years, including Brisanet, Unifique and Ligga. These developments have driven increased investment in network infrastructure, expanded coverage and a more dynamic competitive environment. In addition, the Brazilian mobile market has experienced growing competitive pressure from mobile virtual network operators (MVNOs) and digital-first entrants, which have expanded their offerings and progressively increased their customer bases. Future spectrum auctions, together with the refarming and reorganization of existing spectrum, are expected to support continued network expansion and may further intensify competition, particularly among regional and alternative service providers. Beyond competition from traditional mobile telecommunications operators, competitive pressure from fixed-line and broadband service providers has increased and may continue to intensify. This trend reflects aggressive commercial strategies aimed at attracting subscribers through price competition and bundled offerings that combine mobile and fixed voice services, broadband and other digital services. In recent years, the Brazilian fixed broadband market has been characterized by a combination of organic growth and consolidation through strategic acquisitions. Organic growth has been driven primarily by the expansion of fiber-to-the-home networks and increased penetration within existing coverage areas, although overall growth rates have moderated compared to prior periods. At the same time, market fragmentation has continued to support consolidation initiatives. While earlier phases focused on transactions among smaller regional providers seeking scale and operational efficiencies, more recent transactions and discussions have involved larger regional ISPs and national operators, reflecting a more advanced stage of consolidation. In this context, one potential opportunity for fixed broadband providers is to leverage their existing customer bases through bundled offerings that combine broadband services with mobile solutions, including those supported by neutral mobile network infrastructure. There is also competition from other services outside the telecommunications industry, such as the global and local OTT providers who offer content and services based on the Internet, including voice calls and messaging without paying for network infrastructure. OTT applications have become so important to customers that in many cases they are bundled as free services by mobile operators. OTT communication apps have a business model that demands increased network traffic, but telecommunications companies are the ones required to finance and undertake the network infrastructure investment required to address the increased Internet traffic which comes from OTT applications. In line with our growth strategy of services beyond connectivity, we look into new markets characterized by their own unique competitive environments. Being an orchestrator of a digital partners ecosystem requires us to develop new capabilities and agility to adapt to new markets. E. Critical Accounting Estimates For information about our critical accounting estimates, see our audited financial statements included elsewhere in this annual report.