The following discussion should be read in conjunction with the unaudited condensed consolidated financial statements and notes thereto included in Item 1 of this Quarterly Report on Form 10-Q and WESCO International, Inc.’s audited Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The matters discussed herein may contain forward-looking statements that are subject to certain risks and uncertainties that could cause actual results to differ materially from expectations. Certain of these risks are set forth in Item 1A of WESCO International, Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, as well as WESCO International, Inc.’s other reports filed with the Securities and Exchange Commission. In this Item 2, “Wesco” refers to WESCO International, Inc., and its subsidiaries and its predecessors unless the context otherwise requires. References to “we,” “us,” “our” and the “Company” refer to Wesco and its subsidiaries. In addition to the results provided in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), our discussion and analysis of financial condition and results of operations includes certain non-GAAP financial measures, which are defined further below. These financial measures include Organic sales growth, Earnings before interest, taxes, depreciation and amortization (“EBITDA”), Adjusted EBITDA, Adjusted EBITDA margin, Financial leverage, Adjusted selling, general and administrative expenses, Adjusted income from operations, Adjusted other non-operating (income) expense, Adjusted provision for income taxes, Adjusted income before income taxes, Adjusted net income, Adjusted net income attributable to WESCO International, Inc., Adjusted net income attributable to common stockholders, and Adjusted earnings per diluted share. We believe that these non-GAAP measures are helpful to users of our financial statements as they provide a better understanding of our financial condition and results of operations on a comparable basis. Additionally, certain non-GAAP measures either focus on or exclude items impacting comparability of results, allowing users to more easily compare our financial performance from period to period. Management uses certain non-GAAP financial measures in its evaluation of the performance of the Company’s operating segments and in the determination of incentive compensation. Management does not use these non-GAAP financial measures for any purpose other than the reasons stated above. Company Overview Wesco, headquartered in Pittsburgh, Pennsylvania, is a leading provider of business-to-business distribution, logistics services and supply chain solutions. We employ approximately 21,000 people, maintain relationships with more than 35,000 suppliers, and serve nearly 130,000 customers worldwide. With millions of products, end-to-end supply chain services and significant digital capabilities, Wesco provides innovative solutions to meet customer needs across commercial and industrial businesses, technology companies, telecommunications providers, and utilities. Our innovative solutions include supply chain management, logistics and transportation, procurement, warehousing and inventory management, as well as kitting and labeling, limited assembly of products and installation enhancement. We operate more than 700 sites, including distribution centers, fulfillment centers and sales offices in approximately 50 countries, providing a local presence for customers and a global network to serve multi-location businesses and global corporations. We have operating segments comprising three strategic business units: Electrical & Electronic Solutions (“EES”), Communications & Security Solutions (“CSS”) and Utility & Broadband Solutions (“UBS”). These operating segments are equivalent to our reportable segments. The following is a description of each of our reportable segments and their business activities. Electrical & Electronic Solutions The EES segment, serving customers in over 50 countries, is a North American leader, and supplies a broad range of products and solutions primarily to construction, industrial and original equipment manufacturer (“OEM”) customers. The EES product portfolio includes a broad range of electrical equipment and supplies, automation and connected devices (the “Internet of Things” or “IoT”), security, lighting, wire and cable, safety, and maintenance, repair and operating (“MRO”) products from industry-leading manufacturing partners. The EES service portfolio includes solutions to improve project execution, direct and indirect manufacturing supply chain optimization programs, lighting and renewables advisory services, and digital and automation solutions to improve safety and productivity. 24 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Communications & Security Solutions The CSS segment, serving customers in over 50 countries, is a global leader in data center, network infrastructure and security solutions. CSS sells directly to end-users or through an extensive network of channel partners, including data communications contractors, security and network integrators, professional audio/visual integrators, and systems integrators. CSS also provides a wide range of professional A/V, safety, facilities, and energy management solutions. The full CSS product portfolio is frequently coupled with services designed to enhance efficiency and productivity across all customer segments globally. These services include data center services, advisory, installation enhancement, project deployment, supply chain solutions, and management platforms. Utility & Broadband Solutions The UBS segment is a leader in North America, serving customers primarily in the U.S. and Canada, and provides products and services to investor-owned utilities, electric power cooperatives and municipalities, as well as global service providers, wireless providers, broadband operators and the contractors that service these customers. The products sold include wire and cable, transformers, transmission and distribution hardware, switches, protective devices, connectors, lighting, conduit, fiber and copper cable, connectivity products, pole line hardware, racks, cabinets, safety and MRO products, and point-to-point wireless devices. UBS also offers a complete set of service solutions to improve customer supply chain efficiencies. Business Highlights Our financial results reflect continued sales momentum in the first six months of 2026, highlighted by a 13.4% year-over-year increase in reported Net sales driven by volume growth across all three segments. For the first six months of 2026 compared to the first six months of 2025, organic sales increased by 12.5%, which adjusts for fluctuations in foreign exchange rates. All three of our segments contributed to growth, led by our CSS segment's data center solutions business. Our EES segment experienced continued growth across its OEM and construction businesses, fueled in part by continued demand for data center projects and increased infrastructure activity. Our UBS segment also delivered sales growth, driven by year-over-year increases in its United States and Canadian broadband businesses, along with growth in its utility business and increased grid services activity. We also saw record year-over-year backlog growth driven by all three segments. During the first quarter of 2026, we issued 5.250% Senior Notes due 2031 (the “2031 Notes”) and 5.500% Senior Notes due 2034 (the “2034 Notes” and, together with the 2031 Notes, the “2031 and 2034 Notes”) in part to support the redemption of our 7.250% senior notes due 2028 (the “2028 Notes”) which occurred in the second quarter on June 15, 2026. Following the redemption of the 2028 Notes, we have no significant debt maturities until 2029. We expect this redemption to create substantial net income, earnings per share, and cash flow benefit. We are actively monitoring and evaluating the potential effects of the February 20, 2026 U.S. Supreme Court ruling that invalidated tariffs imposed under the International Emergency Economic Powers Act (“IEEPA”). IEEPA tariff refunds are not expected to materially impact our unaudited Condensed Consolidated Financial Statements. During the second quarter of 2026, we continued to execute on our multi-year, phased development and implementation of a new Digital and Data Platform (“DDP”). The DDP is intended to be a unified, technology-enabled operating model that spans all business functions, maintains and enhances the flow of financial information, and improves resource efficiency. Taking the above highlights into consideration, we believe we are well positioned to benefit from enduring secular growth trends of AI-driven data centers, increased power generation, electrification, automation and reshoring. 25 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Results of Operations Second Quarter of 2026 versus Second Quarter of 2025 Net Sales The following table sets forth Net sales and organic sales growth for the periods presented: Three Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 6,665.1 $ 5,899.6 13.0 % — % 0.4 % — % 12.6 % Note: Organic sales growth is a non-GAAP financial measure of sales performance. Organic sales growth is calculated by deducting the percentage impact from acquisitions and divestitures for one year following the respective transaction, fluctuations in foreign exchange rates and number of workdays from the reported percentage change in consolidated Net sales. Workday impact represents the change in the number of operating days period-over-period after adjusting for weekends and public holidays in the United States; there was no change in the number of workdays in the second quarter of 2026 compared to the second quarter of 2025. Net sales were $6.7 billion for the second quarter of 2026 compared to $5.9 billion for the second quarter of 2025, an increase of 13.0%. Organic sales for the second quarter of 2026 grew by 12.6%. This growth reflects an approximate 10% increase in volume driven by all three segments (CSS, EES and UBS), and an approximate 3% benefit from price. Cost of Goods Sold Cost of goods sold for the second quarter of 2026 was $5.2 billion compared to $4.7 billion for the second quarter of 2025, an increase of 11.9%. Cost of goods sold as a percentage of Net sales was 78.2% and 78.9% for the second quarter of 2026 and 2025, respectively. The favorable impact reflects improved gross margins in the EES and CSS segments, partially offset by a decline in the UBS segment. Selling, General and Administrative Expenses Selling, general and administrative (“SG&A”) expenses for the second quarter of 2026 totaled $1,022.7 million versus $872.2 million for the second quarter of 2025, an increase of $150.5 million, or 17.3%. The following table reconciles SG&A expenses to Adjusted SG&A expenses, which is a non-GAAP financial measure, for the periods presented: Three Months Ended June 30, 2026 % of Net sales June 30, 2025 % of Net sales Adjusted SG&A Expenses: (In millions) SG&A expenses $ 1,022.7 15.3% $ 872.2 14.8% Digital transformation costs(1) (23.2) (7.6) Restructuring costs(2) — (0.5) Adjusted SG&A expenses $ 999.5 15.0% $ 864.1 14.6% (1) Digital transformation costs include costs associated with certain digital transformation initiatives. (2) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. SG&A payroll and payroll-related expenses for the second quarter of 2026 were $628.1 million, an increase of $86.6 million compared to the same period in 2025, which primarily reflects increases of $33.4 million in commissions and incentives, $25.3 million in salaries, $15.6 million in benefits, and $10.7 million in stock-based compensation expense. The higher commissions and incentives expense was largely driven by increased commissions and management incentive accruals aligned with Company performance. 26 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES SG&A expenses not related to payroll and payroll-related costs for the second quarter of 2026 were $394.6 million, an increase of $63.9 million compared to the same period in 2025, which primarily reflects increased professional and consulting fees of $15.3 million, increased transportation costs of $11.8 million, increased costs to operate our facilities of $10.9 million, and increased bad debt expense of $10.7 million. Additionally, digital transformation costs increased by $15.6 million year-over-year primarily due to increased costs associated with DDP deployment resources. Income from Operations Income from operations was $382.2 million for the second quarter of 2026 compared to $322.2 million for the second quarter of 2025, an increase of $60.0 million, or 18.6%. The increase primarily reflects higher Net sales and lower Cost of goods sold as a percentage of Net sales, partially offset by higher SG&A expenses as a percentage of Net sales. Interest Expense, net Net interest expense totaled $110.4 million for the second quarter of 2026 compared to $92.9 million for the second quarter of 2025. The increase of $17.5 million, or 18.8%, was primarily driven by higher net term debt throughout the second quarter of 2026 compared to the second quarter of 2025, as well as a $10.0 million non-cash loss on extinguishment of the 2028 Notes. These increases were partially offset by lower borrowings and lower rates on our accounts receivable securitization facility (the “Receivables Facility”) and our revolving credit facility (the “Revolving Credit Facility”) throughout the second quarter of 2026 compared to the second quarter of 2025. Other Income, net Other non-operating income totaled $0.2 million for the second quarter of 2026 compared to $7.3 million for the second quarter of 2025. We recognized a net foreign currency exchange loss of $2.3 million for the second quarter of 2026 compared to a net foreign currency exchange gain of $3.0 million for the second quarter of 2025. We also recognized $0.6 million and $2.3 million of income in the second quarter of 2026 and 2025, respectively, from adjustments to the fair value of the contingent consideration liability related to a recent acquisition. Income Taxes The provision for income taxes was $62.4 million for the second quarter of 2026 compared to $61.8 million for the corresponding quarter of the prior year, resulting in effective tax rates of 22.9% and 26.1%, respectively. The lower effective tax rate for the second quarter of 2026 is largely driven by higher discrete income tax benefits relating to the exercise of stock-based awards. Net Income and Earnings per Share Net income and Earnings per diluted share attributable to common stockholders were $209.0 million and $4.23, respectively, for the second quarter of 2026 compared to $189.2 million and $3.83, respectively, for the second quarter of 2025. Adjusted for the non-GAAP adjustments above and the related income tax effects, Net income and Earnings per diluted share attributable to common stockholders were $225.6 million and $4.57, respectively, for the three months ended June 30, 2026, and $167.5 million and $3.39, respectively, for the three months ended June 30, 2025. The increase in Adjusted earnings per diluted share primarily reflects the increase in Net sales and lower Cost of goods sold as a percentage of Net sales, partially offset by higher Adjusted SG&A expenses. Adjusted EBITDA Adjusted EBITDA, a non-GAAP financial measure, was $487.2 million for the second quarter of 2026, compared to $394.2 million for the second quarter of 2025, an increase of $93.0 million, or 23.6% year-over-year. The increase primarily reflects higher Net sales and gross margin. 27 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Segment Results The following is a discussion of the financial results of our operating segments comprising three strategic business units consisting of EES, CSS and UBS for the three months ended June 30, 2026. As further described below and in Note 12, “Business Segments” of our Notes to the unaudited Condensed Consolidated Financial Statements, the Chief Operating Decision Maker (the “CODM”) allocates resources and evaluates the performance of the Company’s reportable segments based on Adjusted EBITDA, which is the Company’s measure of segment profit or loss. Adjusted EBITDA and Adjusted EBITDA margin percentage are non-GAAP financial measures. Electrical & Electronic Solutions Three Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 2,510.7 $ 2,257.8 11.2 % — % 0.3 % — % 10.9 % Adjusted EBITDA $ 231.3 $ 182.9 Adjusted EBITDA margin % 9.2 % 8.1 % EES reported Net sales of $2.5 billion for the second quarter of 2026 compared to $2.3 billion for the second quarter of 2025, an increase of $252.9 million, or 11.2%. EES organic sales for the second quarter of 2026 increased by 10.9%, reflecting volume growth of approximately 6%, driven primarily by the construction and OEM businesses, and by the impact of changes in price, which favorably impacted organic sales by approximately 5%. EES Adjusted EBITDA increased $48.4 million, or 26.5% year-over-year. The increase primarily reflects an increase in volume and price, as well as improved gross margin. Communications & Security Solutions Three Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 2,681.2 $ 2,265.2 18.4 % — % 0.9 % — % 17.5 % Adjusted EBITDA $ 272.9 $ 198.9 Adjusted EBITDA margin % 10.2 % 8.8 % CSS reported Net sales of $2.7 billion for the second quarter of 2026 compared to $2.3 billion for the second quarter of 2025, an increase of $416.0 million, or 18.4%. CSS organic sales for the second quarter of 2026 grew by 17.5%, primarily reflecting volume growth of approximately 17%, driven primarily by the data center solutions business, as well as the impact of changes in price, which favorably impacted organic sales by approximately 1%. CSS Adjusted EBITDA increased $74.0 million, or 37.2% year-over-year. The increase primarily reflects an increase in volume, specifically within the data center solutions business as well as improved gross margin and lower SG&A expenses as a percentage of Net sales. Utility & Broadband Solutions Three Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 1,473.2 $ 1,376.6 7.0 % — % — % — % 7.0 % Adjusted EBITDA $ 146.8 $ 143.7 Adjusted EBITDA margin % 10.0 % 10.4 % UBS reported Net sales of $1,473.2 million for the second quarter of 2026 compared to $1,376.6 million for the second quarter of 2025, an increase of $96.6 million, or 7.0%, reflecting volume growth of approximately 4% driven by the broadband and utility businesses, as well as the impact of changes in price, which favorably impacted organic sales by approximately 3%. UBS Adjusted EBITDA increased $3.1 million, or 2.2% year-over-year. 28 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES The following tables reconcile Net income attributable to common stockholders to Adjusted EBITDA and Adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented: Three Months Ended June 30, 2026 (In millions) EES CSS UBS Corporate Total Net income attributable to common stockholders $ 204.1 $ 232.2 $ 136.8 $ (364.1) $ 209.0 Net income (loss) attributable to noncontrolling interests 0.2 0.6 — (0.2) 0.6 Provision for income taxes(1) — — — 62.4 62.4 Interest expense, net(1) — — — 110.4 110.4 Depreciation and amortization 13.7 19.8 9.1 8.5 51.1 Other expense (income), net 12.6 18.7 — (31.5) (0.2) Stock-based compensation expense 0.7 1.6 0.9 15.9 19.1 Digital transformation costs(2) — — — 23.2 23.2 Cloud computing arrangement amortization(3) — — — 11.6 11.6 Adjusted EBITDA $ 231.3 $ 272.9 $ 146.8 $ (163.8) $ 487.2 Adjusted EBITDA margin % 9.2 % 10.2 % 10.0 % (1) The reportable segments do not incur income taxes and interest expense as these costs are centrally controlled through the Corporate tax and treasury functions. (2) Digital transformation costs include costs associated with certain digital transformation initiatives. (3) Cloud computing arrangement amortization consists of expense recognized in Selling, general and administrative expenses for capitalized implementation costs for cloud computing arrangements to support our digital transformation initiatives. Three Months Ended June 30, 2025 (In millions) EES CSS UBS Corporate Total Net income attributable to common stockholders $ 162.1 $ 162.1 $ 137.8 $ (272.8) $ 189.2 Net income (loss) attributable to noncontrolling interests 0.1 0.6 — (0.4) 0.3 Gain on redemption of Series A Preferred Stock — — — (27.6) (27.6) Preferred stock dividends — — — 12.9 12.9 Provision for income taxes(1) — — — 61.8 61.8 Interest expense, net(1) — — — 92.9 92.9 Depreciation and amortization 12.4 19.1 7.6 9.2 48.3 Other expense (income), net 7.3 15.7 (2.2) (28.1) (7.3) Stock-based compensation expense 1.0 1.4 0.5 5.5 8.4 Digital transformation costs(2) — — — 7.6 7.6 Cloud computing arrangement amortization(3) — — — 7.2 7.2 Restructuring costs(4) — — — 0.5 0.5 Adjusted EBITDA $ 182.9 $ 198.9 $ 143.7 $ (131.3) $ 394.2 Adjusted EBITDA margin % 8.1 % 8.8 % 10.4 % (1) The reportable segments do not incur income taxes and interest expense as these costs are centrally controlled through the Corporate tax and treasury functions. (2) Digital transformation costs include costs associated with certain digital transformation initiatives. (3) Cloud computing arrangement amortization consists of expense recognized in Selling, general and administrative expenses for capitalized implementation costs for cloud computing arrangements to support our digital transformation initiatives. (4) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. Note: Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of the Company's performance and its ability to meet debt service requirements. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by Net sales. 29 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES The following tables reconcile Selling, general and administrative expenses, Income from operations, Provision for income taxes, Net income attributable to common stockholders and Earnings per diluted share to Adjusted selling, general and administrative expenses, Adjusted income from operations, Adjusted provision for income taxes, Adjusted net income attributable to common stockholders, and Adjusted earnings per diluted share, which are non-GAAP financial measures, for the periods presented: Three Months Ended June 30, 2026 June 30, 2025 Adjusted SG&A Expenses: (In millions) SG&A expenses $ 1,022.7 $ 872.2 Digital transformation costs(1) (23.2) (7.6) Restructuring costs(2) — (0.5) Adjusted SG&A expenses $ 999.5 $ 864.1 Adjusted Income from Operations: Income from operations $ 382.2 $ 322.2 Digital transformation costs(1) 23.2 7.6 Restructuring costs(2) — 0.5 Adjusted income from operations $ 405.4 $ 330.3 Adjusted Provision for Income Taxes: Provision for income taxes $ 62.4 $ 61.8 Income tax effect of adjustments to Income from operations(3) 6.6 2.2 Adjusted provision for income taxes $ 69.0 $ 64.0 Adjusted Net Income Attributable to Common Stockholders: Net income attributable to common stockholders $ 209.0 $ 189.2 Digital transformation costs(1) 23.2 7.6 Restructuring costs(2) — 0.5 Income tax effect of adjustments to Income from operations(3) (6.6) (2.2) Gain on redemption of Series A Preferred Stock — (27.6) Adjusted net income attributable to common stockholders $ 225.6 $ 167.5 (1) Digital transformation costs include costs associated with certain digital transformation initiatives. (2) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. (3) The adjustments to Income from operations have been tax effected at rates of 28.4% and 26.3% for the three months ended June 30, 2026 and 2025, respectively. 30 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Three Months Ended Adjusted Earnings per Diluted Share: June 30, 2026 June 30, 2025 (In millions, except per share data) Adjusted income from operations $ 405.4 $ 330.3 Interest expense, net 110.4 92.9 Other income, net (0.2) (7.3) Adjusted income before income taxes 295.2 244.7 Adjusted provision for income taxes 69.0 64.0 Adjusted net income 226.2 180.7 Net income attributable to noncontrolling interests 0.6 0.3 Adjusted net income attributable to WESCO International, Inc. 225.6 180.4 Preferred stock dividends — 12.9 Adjusted net income attributable to common stockholders $ 225.6 $ 167.5 Diluted shares 49.4 49.4 Adjusted earnings per diluted share $ 4.57 $ 3.39 Note: For the three months ended June 30, 2026, Selling, general and administrative expenses, Income from operations, Provision for income taxes, Net income attributable to common stockholders, and Earnings per diluted share have been adjusted to exclude Digital transformation costs and the related income tax effects. For the three months ended June 30, 2025, Selling, general and administrative expenses, Income from operations, Provision for income taxes, Net income attributable to common stockholders, and Earnings per diluted share have been adjusted to exclude Digital transformation costs, Restructuring costs, and the related income tax effects, and the Gain on redemption of the Company's Series A Preferred Stock. These non-GAAP financial measures provide a better understanding of our financial results on a comparable basis. 31 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Six Months Ended June 30, 2026 versus Six Months Ended June 30, 2025 Net Sales The following table sets forth Net sales and organic sales growth for the periods presented: Six Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 12,745.2 $ 11,243.3 13.4 % — % 0.9 % — % 12.5 % Note: Organic sales growth is a non-GAAP financial measure of sales performance. Organic sales growth is calculated by deducting the percentage impact from acquisitions and divestitures for one year following the respective transaction, fluctuations in foreign exchange rates and number of workdays from the reported percentage change in consolidated Net sales. Workday impact represents the change in the number of operating days period-over-period after adjusting for weekends and public holidays in the United States; there was no change in the number of workdays in the first six months of 2026 compared to the first six months of 2025. Net sales were $12.7 billion for the first six months of 2026 compared to $11.2 billion for the first six months of 2025, an increase of 13.4%. Organic sales for the first six months of 2026 grew by 12.5%. This growth reflects an approximate 10% increase in volume driven by all three segments (CSS, EES, and UBS), and an approximate 3% benefit from price. Cost of Goods Sold Cost of goods sold for the first six months of 2026 was $10.0 billion compared to $8.9 billion for the first six months of 2025, an increase of 12.6%. Cost of goods sold as a percentage of Net sales was 78.4% and 78.9% for the first six months of 2026 and 2025, respectively. The favorable impact reflects improved gross margin in the EES and CSS segments, partially offset by a decline in the UBS segment. Selling, General and Administrative Expenses SG&A expenses for the first six months of 2026 totaled $2.0 billion versus $1.7 billion for the first six months of 2025, an increase of $261.8 million, or 15.3%. The following table reconciles SG&A expenses to Adjusted SG&A expenses, which is a non-GAAP financial measure, for the periods presented: Six Months Ended June 30, 2026 % of Net sales June 30, 2025 % of Net sales Adjusted SG&A Expenses: (In millions) SG&A expenses $ 1,970.3 15.5% $ 1,708.5 15.2% Digital transformation costs(1) (40.7) (13.8) Restructuring costs(2) — (1.6) Adjusted SG&A expenses $ 1,929.6 15.1% $ 1,693.1 15.1% (1) Digital transformation costs include costs associated with certain digital transformation initiatives. (2) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. SG&A payroll and payroll-related expenses for the first six months of 2026 were $1,213.0 million, an increase of $152.1 million compared to the same period in 2025, which primarily reflects increases of $55.7 million in commissions and incentives, $51.8 million in salaries, $25.0 million in benefits, and $16.6 million in stock-based compensation expense. The higher commissions and incentives expense was largely driven by increased commissions and management incentive accruals aligned with Company performance. SG&A expenses not related to payroll and payroll-related costs for the first six months of 2026 were $757.3 million, an increase of $109.7 million compared to the same period in 2025, which primarily reflects increased professional and consulting fees of $26.0 million, increased transportation costs of $24.1 million, increased costs to operate our facilities of $21.3 million, and increased IT costs of $20.6 million. Additionally, digital transformation costs increased by $26.9 million year-over-year primarily due to increased costs associated with DDP deployment resources. 32 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Income from Operations Income from operations was $675.7 million for the first six months of 2026 compared to $563.1 million for the first six months of 2025, an increase of $112.6 million, or 20.0%. The increase primarily reflects higher Net sales and lower Cost of goods sold as a percentage of Net sales, partially offset by higher SG&A expenses as a percentage of Net sales. Interest Expense, net Net interest expense totaled $207.1 million for the first six months of 2026 compared to $179.2 million for the first six months of 2025. The increase of $27.9 million, or 15.6%, was primarily driven by higher net term debt throughout the first six months of 2026 compared to the first six months of 2025, as well as a $10.0 million non-cash loss on extinguishment of the 2028 Notes. These increases were partially offset by lower borrowings and lower rates on our Receivables Facility and our Revolving Credit Facility throughout the first six months of 2026 compared to the first six months of 2025. Other Income, net Other non-operating income totaled $0.6 million for the first six months of 2026 compared to $7.1 million for the first six months of 2025. We recognized a net foreign currency exchange loss of $3.1 million for the first six months of 2026 compared to a net foreign currency exchange gain of $1.9 million for the first six months of 2025. We also recognized $1.1 million and $2.4 million of income in the first six months of 2026 and 2025, respectively, from adjustments to the fair value of the contingent consideration liability related to a recent acquisition. The following table reconciles Other non-operating income to Adjusted other non-operating income, which is a non-GAAP financial measure, for the periods presented: Six Months Ended June 30, 2026 June 30, 2025 Adjusted Other Income, net: (In millions) Other income, net $ (0.6) $ (7.1) Loss on termination of business arrangement(1) — (0.3) Adjusted other income, net $ (0.6) $ (7.4) (1) Loss on termination of business arrangement represents the loss recognized as a result of management's decision to terminate a business arrangement with a third party. Income Taxes The provision for income taxes was $105.5 million for the first six months of 2026 compared to $97.9 million in last year's comparable period, resulting in effective tax rates of 22.5% and 25.0%, respectively. The lower effective tax rate for the first six months of 2026 is largely driven by higher discrete income tax benefits relating to the exercise and vesting of stock-based awards. Net Income and Earnings per Share Net income and Earnings per diluted share attributable to common stockholders were $362.8 million and $7.33, respectively, for the first six months of 2026 compared to $293.2 million and $5.92, respectively, for the first six months of 2025. Adjusted for the non-GAAP adjustments above and the related income tax effects, and the $27.6 million gain recognized as a result of the Company's redemption of its outstanding Series A Preferred Stock, Net income and Earnings per diluted share attributable to common stockholders were $392.4 million and $7.93, respectively, for the first six months of 2026 and $277.2 million and $5.60, respectively, for the first six months of 2025. The increase in Adjusted earnings per diluted share primarily reflects the increase in Net sales and lower Cost of goods sold as a percentage of Net sales. Adjusted EBITDA Adjusted EBITDA, a non-GAAP financial measure, was $876.0 million for the first six months of 2026 compared to $704.9 million for the first six months of 2025, an increase of $171.1 million, or 24.3% year-over-year. The increase primarily reflects higher Net sales and gross margin. 33 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Segment Results The following is a discussion of the financial results of our operating segments comprising three strategic business units consisting of EES, CSS and UBS for the six months ended June 30, 2026. As further described below and in Note 12, “Business Segments” of our Notes to the unaudited Condensed Consolidated Financial Statements, the CODM allocates resources and evaluates the performance of the Company’s reportable segments based on Adjusted EBITDA, which is the Company’s measure of segment profit or loss. Adjusted EBITDA and Adjusted EBITDA margin percentage are non-GAAP financial measures. Electrical & Electronic Solutions Six Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 4,754.9 $ 4,323.1 10.0 % — % 0.9 % — % 9.1 % Adjusted EBITDA $ 416.3 $ 325.5 Adjusted EBITDA Margin % 8.8 % 7.5 % EES reported Net sales of $4.8 billion for the first six months of 2026 compared to $4.3 billion for the first six months of 2025, an increase of $431.8 million, or 10.0%. EES organic sales for the first six months of 2026 grew by 9.1%, reflecting volume growth of approximately 5%, driven primarily by the construction and OEM businesses, and by the impact of changes in price, which favorably impacted organic sales by approximately 4%. EES Adjusted EBITDA increased $90.8 million, or 27.9% year-over-year. The increase primarily reflects an increase in volume and price, as well as improved gross margin. Communications & Security Solutions Six Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 5,160.1 $ 4,265.5 21.0 % — % 1.3 % — % 19.7 % Adjusted EBITDA $ 496.1 $ 357.4 Adjusted EBITDA Margin % 9.6 % 8.4 % CSS reported Net sales of $5.2 billion for the first six months of 2026 compared to $4.3 billion for the first six months of 2025, an increase of $894.6 million, or 21.0%. CSS organic sales for the first six months of 2026 grew by 19.7%, primarily reflecting volume growth of approximately 19%, driven primarily by the data center solutions business, as well as the impact of changes in price, which favorably impacted organic sales by approximately 1%. CSS Adjusted EBITDA increased $138.7 million, or 38.8% year-over-year. The increase primarily reflects an increase in volume, specifically within the data center solutions business, as well as improved gross margin and lower SG&A expenses as a percentage of Net sales. Utility & Broadband Solutions Six Months Ended Growth/(Decline) June 30, 2026 June 30, 2025 Reported Sales Acquisition Foreign Exchange Workday Organic Sales (In millions) Net sales $ 2,830.2 $ 2,654.7 6.6 % — % 0.2 % — % 6.4 % Adjusted EBITDA $ 277.5 $ 282.0 Adjusted EBITDA Margin % 9.8 % 10.6 % 34 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES UBS reported Net sales of $2.8 billion for the first six months of 2026 compared to $2.7 billion for the first six months of 2025, an increase of $175.5 million, or 6.6%. UBS organic sales for the first six months of 2026 grew by 6.4%, reflecting volume growth of approximately 3% driven by the broadband and utility businesses, as well as the impact of changes in price, which favorably impacted organic sales by approximately 3%. UBS Adjusted EBITDA decreased $4.5 million, or 1.6% year-over-year. The following tables reconcile Net income attributable to common stockholders to Adjusted EBITDA and Adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented: Six Months Ended June 30, 2026 (In millions) EES CSS UBS Corporate Total Net income attributable to common stockholders $ 368.2 $ 420.5 $ 258.5 $ (684.4) $ 362.8 Net income (loss) attributable to noncontrolling interests 0.3 1.1 — (0.5) 0.9 Provision for income taxes(1) — — — 105.5 105.5 Interest expense, net(1) — — — 207.1 207.1 Depreciation and amortization 26.9 39.5 17.7 17.7 101.8 Other expense (income), net 19.4 31.8 (0.4) (51.4) (0.6) Stock-based compensation expense 1.5 3.2 1.7 28.8 35.2 Digital transformation costs(2) — — — 40.7 40.7 Cloud computing arrangement amortization(3) — — — 22.6 22.6 Adjusted EBITDA $ 416.3 $ 496.1 $ 277.5 $ (313.9) $ 876.0 Adjusted EBITDA margin % 8.8 % 9.6 % 9.8 % (1) The reportable segments do not incur income taxes and interest expense as these costs are centrally controlled through the Corporate tax and treasury functions. (2) Digital transformation costs include costs associated with certain digital transformation initiatives. (3) Cloud computing arrangement amortization consists of expense recognized in Selling, general and administrative expenses for capitalized implementation costs for cloud computing arrangements to support our digital transformation initiatives. 35 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Six Months Ended June 30, 2025 (In millions) EES CSS UBS Corporate Total Net income attributable to common stockholders $ 287.2 $ 289.3 $ 268.1 $ (551.4) $ 293.2 Net income (loss) attributable to noncontrolling interests — 0.7 — (0.5) 0.2 Gain on redemption of Series A Preferred Stock — — — (27.6) (27.6) Preferred stock dividends — — — 27.3 27.3 Provision for income taxes(1) — — — 97.9 97.9 Interest expense, net(1) — — — 179.2 179.2 Depreciation and amortization 24.6 38.1 15.4 18.6 96.7 Other expense (income), net 11.7 26.6 (2.4) (43.0) (7.1) Stock-based compensation expense 2.0 2.7 0.9 13.0 18.6 Digital transformation costs(2) — — — 13.8 13.8 Cloud computing arrangement amortization(3) — — — 11.1 11.1 Restructuring costs(4) — — — 1.6 1.6 Adjusted EBITDA $ 325.5 $ 357.4 $ 282.0 $ (260.0) $ 704.9 Adjusted EBITDA margin % 7.5 % 8.4 % 10.6 % (1) The reportable segments do not incur income taxes and interest expense as these costs are centrally controlled through the Corporate tax and treasury functions. (2) Digital transformation costs include costs associated with certain digital transformation initiatives. (3) Cloud computing arrangement amortization consists of expense recognized in Selling, general and administrative expenses for capitalized implementation costs for cloud computing arrangements to support our digital transformation initiatives. (4) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. Note: Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of the Company's performance and its ability to meet debt service requirements. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by Net sales. 36 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES The following tables reconcile Selling, general and administrative expenses, Income from operations, Other non-operating income, Provision for income taxes, Net income attributable to common stockholders and Earnings per diluted share to Adjusted selling, general and administrative expenses, Adjusted income from operations, Adjusted other non-operating income, Adjusted provision for income taxes, Adjusted net income attributable to common stockholders, and Adjusted earnings per diluted share, which are non-GAAP financial measures, for the periods presented: Six Months Ended June 30, 2026 June 30, 2025 Adjusted SG&A Expenses: (In millions) SG&A expenses $ 1,970.3 $ 1,708.5 Digital transformation costs(1) (40.7) (13.8) Restructuring costs(2) — (1.6) Adjusted SG&A expenses $ 1,929.6 $ 1,693.1 Adjusted Income from Operations: Income from operations $ 675.7 $ 563.1 Digital transformation costs(1) 40.7 13.8 Restructuring costs(2) — 1.6 Adjusted income from operations $ 716.4 $ 578.5 Adjusted Other Income, net: Other income, net $ (0.6) $ (7.1) Loss on termination of business arrangement(3) — (0.3) Adjusted other income, net $ (0.6) $ (7.4) Adjusted Provision for Income Taxes: Provision for income taxes $ 105.5 $ 97.9 Income tax effect of adjustments to Income from operations and Other income, net(4) 11.1 4.1 Adjusted provision for income taxes $ 116.6 $ 102.0 Adjusted Net Income Attributable to Common Stockholders: Net income attributable to common stockholders $ 362.8 $ 293.2 Digital transformation costs(1) 40.7 13.8 Restructuring costs(2) — 1.6 Loss on termination of business arrangement(3) — 0.3 Income tax effect of adjustments to Income from operations and Other income, net(4) (11.1) (4.1) Gain on redemption of Series A Preferred Stock — (27.6) Adjusted net income attributable to common stockholders $ 392.4 $ 277.2 (1) Digital transformation costs include costs associated with certain digital transformation initiatives. (2) Restructuring costs include severance costs incurred pursuant to an ongoing restructuring plan. (3) Loss on termination of business arrangement represents the loss recognized as a result of management's decision to terminate a business arrangement with a third party. (4) The adjustments to Income from operations and Other income, net have been tax effected at rates of 27.2% and 26.3% for the six months ended June 30, 2026 and 2025, respectively. 37 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Six Months Ended Adjusted Earnings per Diluted Share: June 30, 2026 June 30, 2025 (In millions, except per share data) Adjusted income from operations $ 716.4 $ 578.5 Interest expense, net 207.1 179.2 Adjusted other income, net (0.6) (7.4) Adjusted income before income taxes 509.9 406.7 Adjusted provision for income taxes 116.6 102.0 Adjusted net income 393.3 304.7 Net income attributable to noncontrolling interests 0.9 0.2 Adjusted net income attributable to WESCO International, Inc. 392.4 304.5 Preferred stock dividends — 27.3 Adjusted net income attributable to common stockholders $ 392.4 $ 277.2 Diluted shares 49.5 49.5 Adjusted earnings per diluted share $ 7.93 $ 5.60 Note: For the six months ended June 30, 2026, Selling, general and administrative expenses, Income from operations, Provision for income taxes, Net income attributable to common stockholders, and Earnings per diluted share have been adjusted to exclude Digital transformation costs and the related income tax effects. For the six months ended June 30, 2025, SG&A expenses, Income from operations, Other non-operating (income) expense, Provision for income taxes, Net income attributable to common stockholders, and Earnings per diluted share have been adjusted to exclude Digital transformation costs, Restructuring costs, the Loss on termination of business arrangement, and the related income tax effects, and the Gain on redemption of the Company's Series A Preferred Stock. These non-GAAP financial measures provide a better understanding of our financial results on a comparable basis. 38 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Liquidity and Capital Resources Our liquidity needs generally arise from fluctuations in our working capital requirements, information technology investments, capital expenditures, acquisitions, the payment of dividends, and debt service obligations. We finance our operating and investing needs primarily with borrowings under our Revolving Credit Facility and Receivables Facility, as well as uncommitted lines of credit entered into by certain of our foreign subsidiaries to support local operations, some of which are overdraft facilities. The Revolving Credit Facility has a borrowing limit of $1,725 million and the purchase limit under the Receivables Facility is $1,550 million. Our international lines of credit generally are renewable on an annual basis and certain facilities are fully and unconditionally guaranteed by Wesco Distribution. Accordingly, certain borrowings under these lines directly reduce availability under our Revolving Credit Facility. The maximum borrowing limits of our international lines of credit vary by facility and range between $1.0 million and $12.0 million. As of June 30, 2026, we had $2.1 million outstanding under our international lines of credit. As of June 30, 2026, we had $578.9 million outstanding and $1,110.7 million in available borrowing capacity on the Revolving Credit Facility after giving effect to outstanding letters of credit and certain borrowings under our international lines of credit. Additionally as of June 30, 2026, we had $1,275.0 million outstanding and $275.0 million of available borrowing capacity under our Receivables Facility, which combined with available cash of $302.0 million, provided liquidity of approximately $1.7 billion. Cash included in our determination of liquidity represents cash in certain deposit and interest-bearing investment accounts held in the United States and Canada. We monitor the depository institutions that hold our cash and cash equivalents on a regular basis, and we believe that we have placed our deposits with creditworthy financial institutions. For disclosure of our debt instruments, including our outstanding indebtedness as of June 30, 2026, see Note 8, “Debt” of our Notes to the unaudited Condensed Consolidated Financial Statements. On February 27, 2026, Wesco Distribution issued $650 million aggregate principal amount of 2031 Notes and $850 million aggregate principal amount of 2034 Notes. We used the net proceeds from the issuance of the 2031 and 2034 Notes to redeem all of our outstanding 2028 Notes on June 15, 2026. Prior to redeeming the 2028 Notes, we used the net proceeds to temporarily repay a portion of the outstanding borrowings under our Receivables Facility and Revolving Credit Facility. We subsequently redrew under the Receivables Facility and the Revolving Credit Facility in an aggregate amount sufficient to redeem the 2028 Notes. We regularly review our mix of fixed versus variable rate debt, and we may, from time to time, issue or retire borrowings and/or refinance existing debt in an effort to mitigate the impact of interest rate and foreign exchange rate fluctuations, and to maintain a cost-effective capital structure consistent with our anticipated capital requirements. Interest rates remained stable in the first six months of 2026, after the Federal Reserve reduced its benchmark interest rate by 50 basis points in the fourth quarter of 2025. Future interest rate changes would raise or lower the rates we pay on our variable rate debt and would contribute to fluctuations in interest expense versus prior periods. As of June 30, 2026, approximately 68% of our debt portfolio consisted of fixed rate debt. We believe our capital structure has an appropriate mix of fixed versus variable rate debt and secured versus unsecured instruments. Over the next several quarters, we expect that our excess liquidity will be directed primarily at debt reduction, the payment of dividends, share repurchases, digital transformation initiatives, and potential acquisitions and related integration activities. We expect to maintain sufficient liquidity through our credit facilities and cash balances. We continue to monitor the sufficiency of our liquidity given the potential impact of current economic conditions and uncertainty, including tariffs, interest rates, and inflation. While we did not face significant challenges with our sources or uses of cash in the second quarter of 2026, future market disruptions could occur which could potentially affect our liquidity. We believe cash provided by operations and financing activities will be adequate to cover our operational and business needs for at least the next twelve months. We communicate on a regular basis with our lenders regarding our financial and working capital performance, and liquidity position. We were in compliance with all financial covenants and restrictions contained in our debt agreements as of June 30, 2026. We also measure our ability to meet our debt obligations based on our financial leverage ratio, which was 3.0x as of June 30, 2026 and 3.4x as of December 31, 2025. 39 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES The following table sets forth our financial leverage ratio, which is a non-GAAP financial measure, for the periods presented: Twelve Months Ended June 30, 2026 December 31, 2025 (In millions, except ratios) Net income attributable to common stockholders $ 715.5 $ 645.8 Net income attributable to noncontrolling interests 3.0 2.3 Gain on redemption of Series A Preferred Stock (5.3) (32.9) Preferred stock dividends — 27.3 Provision for income taxes 221.0 213.4 Interest expense, net 414.5 386.7 Depreciation and amortization 202.6 197.6 EBITDA $ 1,551.3 $ 1,440.2 Other income, net (3.1) (9.6) Stock-based compensation expense 57.1 40.5 Digital transformation costs(1) 62.1 35.2 Cloud computing arrangement amortization(2) 41.8 30.2 Restructuring costs(3) (1.6) — Adjusted EBITDA $ 1,707.6 $ 1,536.5 As of June 30, 2026 December 31, 2025 Short-term debt and current portion of long-term debt, net $ 25.0 $ 25.0 Long-term debt, net 5,911.1 5,756.4 Debt discount and debt issuance costs(4) 49.8 48.0 Total debt 5,985.9 5,829.4 Less: Cash and cash equivalents 808.9 604.8 Total debt, net of cash $ 5,177.0 $ 5,224.6 Financial leverage ratio 3.0 3.4 (1)Digital transformation costs include costs associated with certain digital transformation initiatives. (2)Cloud computing arrangement amortization consists of expense recognized in Selling, general and administrative expenses for capitalized implementation costs for cloud computing arrangements to support our digital transformation initiatives. (3)Reduction to restructuring costs represents the reversal of certain severance costs previously incurred pursuant to an ongoing restructuring plan. (4)Debt is presented in the Condensed Consolidated Balance Sheets net of Debt discount and debt issuance costs. Note: Financial leverage ratio is a non-GAAP measure of the use of debt. Financial leverage ratio is calculated by dividing total debt, excluding debt issuance costs and debt discount, net of cash, by Adjusted EBITDA. EBITDA is defined as the trailing twelve months earnings before interest, taxes, depreciation and amortization. Most of the undistributed earnings of our foreign subsidiaries have been taxed in the U.S. under either the one-time tax imposed on the deemed repatriation of undistributed foreign earnings (the “transition tax”), or the global intangible low-taxed income tax regime imposed by the Tax Cuts and Jobs Act of 2017 renamed, along with other changes, under the One Big Beautiful Bill Act signed into law on July 4, 2025, to net controlled foreign corporation tested income. The distribution of earnings, however, by our foreign subsidiaries in the form of dividends, or otherwise, may be subject to additional taxation. We believe that we are able to maintain sufficient liquidity for our domestic operations and commitments without repatriating cash from our foreign subsidiaries. Therefore, we continue to assert that the remaining undistributed earnings of our foreign subsidiaries are indefinitely reinvested. 40 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES An analysis of cash flow for the first six months of 2026 and 2025 follows: Operating Activities Net cash provided by operating activities for the first six months of 2026 totaled $275.1 million, compared to $135.8 million for the first six months of 2025. The $139.3 million increase is driven by a $170.4 million impact from changes in other current and noncurrent liabilities, primarily driven by increases in deferred revenue due to advance payments from customers and milestone billings. Accounts payable additionally contributed to the increase, with a $151.3 million impact primarily driven by increased inventory purchases, as well as the timing of inventory purchases and payments to suppliers as compared to the prior year. An increase in net income as adjusted for certain non-cash items also contributed to the increase in operating cash flows. These increases were partially offset by a $209.8 million impact from changes in trade accounts receivable and a $168.1 million impact from changes in other current and noncurrent assets. The impact from trade accounts receivable was primarily due to sales growth in all three segments, as well as the timing of receipts from customers as compared to the prior year, and the impact from other current and noncurrent assets was primarily due to increases in supplier prepayments. Investing Activities Net cash used in investing activities for the first six months of 2026 was $48.0 million compared to $76.9 million in the first six months of 2025. Included in the first six months of 2026 were capital expenditures of $51.6 million compared to $42.2 million in the first six months of 2025. Capital expenditures in the first six months of 2026 and 2025 primarily comprised leasehold improvements and equipment to support our global network of locations, and internal-use computer software and information technology hardware to support our digital transformation initiatives. Included in the first six months of 2025 was $36.3 million paid to acquire Industrial Software Solutions, net of cash acquired. Financing Activities Net cash used in financing activities for the first six months of 2026 was $21.9 million, compared to $108.3 million during the first six months of 2025. During the first six months of 2026, financing activities primarily comprised the redemption of our $1,325 million aggregate principal amount of 2028 Notes, net repayments of $25.0 million related to our Receivables Facility, payment of debt issuance costs of $19.1 million related to the issuance of the 2031 and 2034 Notes, net borrowings of $5.4 million related to our Revolving Credit Facility, and proceeds of $650.0 million and $850.0 million related to the issuance of the 2031 and 2034 Notes, respectively. The first six months of 2026 also included $48.8 million of dividends paid to holders of our common stock, $48.1 million of payments for taxes related to the exercise and vesting of stock-based awards, and $39.9 million of common stock repurchases. During the first six months of 2025, financing activities primarily comprised proceeds of $800.0 million related to the issuance of the 6.375% senior notes due 2033 (the “2033 Notes”), net repayments of $150.0 million related to our Receivables Facility, net repayments of $50.0 million related to our Revolving Credit Facility, and payment of total debt issuance costs of $14.0 million related to the issuance of the 2033 Notes and amendments to the Revolving Credit Facility and Receivables Facility. The first six months of 2025 also included $540.3 million paid to redeem our Series A Preferred Stock, $50.0 million of common stock repurchases, $44.2 million and $27.3 million of dividends paid to holders of our common stock and Series A Preferred Stock, respectively, and $18.4 million of payments for taxes related to the exercise and vesting of stock-based awards. Contractual Cash Obligations and Other Commercial Commitments There were no material changes in our contractual obligations and other commercial commitments that would require an update to the disclosure provided in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025. Seasonality Our operating results are not significantly affected by seasonal factors. Sales during the first and fourth quarters have historically been affected by a reduced level of activity due to the impact of weather on projects. Sales typically increase beginning in March, with slight fluctuations per month through October. During periods of economic expansion or contraction, our sales by quarter have varied significantly from this pattern. Critical Accounting Estimates There have been no significant changes to the critical accounting estimates disclosed in Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the year ended December 31, 2025. Recent Accounting Standards See Note 2, “Accounting Policies” of our Notes to the unaudited Condensed Consolidated Financial Statements for a description of recently issued accounting standards. 41 Table of Contents WESCO INTERNATIONAL, INC. AND SUBSIDIARIES Forward-Looking Statements All statements made herein that are not historical facts should be considered as “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially. These statements include, but are not limited to, statements regarding business strategy, growth strategy, competitive strengths, productivity and profitability enhancement, competition, new product and service introductions, and liquidity and capital resources. Such statements can generally be identified by the use of words such as “anticipate,” “plan,” “believe,” “estimate,” “intend,” “expect,” “project,” and similar words, phrases or expressions or future or conditional verbs such as “could,” “may,” “should,” “will,” and “would,” although not all forward-looking statements contain such words. These forward-looking statements are based on current expectations and beliefs of Wesco's management, as well as assumptions made by, and information currently available to, Wesco's management, current market trends and market conditions and involve risks and uncertainties, many of which are outside of Wesco's and Wesco's management's control, and which may cause actual results to differ materially from those contained in forward-looking statements. Accordingly, you should not place undue reliance on such statements. Important factors that could cause actual results or events to differ materially from those presented or implied in the forward-looking statements include, among others, the failure to achieve the anticipated benefits of, and other risks associated with, acquisitions, joint ventures, divestitures and other corporate transactions; the inability to successfully integrate acquired businesses; the impact of increased interest rates or borrowing costs; fluctuations in currency exchange rates; evolving impacts from tariffs or other trade tensions between the U.S. and other countries (including implementation of new tariffs and retaliatory measures); failure to adequately protect Wesco's intellectual property or successfully defend against infringement claims; the inability to successfully deploy new technologies, digital products and information systems or to otherwise adapt to emerging technologies in the marketplace, such as those incorporating artificial intelligence (AI); risks relating to our use or reliance on AI; failure to execute on our efforts and programs related to environmental, social and governance (ESG) matters; unanticipated expenditures or other adverse developments related to compliance with new or stricter government policies, laws or regulations, including those relating to data privacy, cybersecurity, competition, sustainability and environmental protection; the inability to successfully develop, manage or implement new technology initiatives or business strategies, including with respect to the expansion of e-commerce or AI capabilities and other digital solutions and digitalization initiatives; disruption of information technology systems or operations; natural disasters (including as a result of climate change), health epidemics, pandemics and other outbreaks; supply chain disruptions; geopolitical conflicts and issues, such as the ongoing Middle East and Russia/Ukraine conflicts; the impact of changing and expanding export controls, sanctions, and data localization rules; the failure to manage the increased risks and impacts of cyber incidents or data breaches; and exacerbation of key materials shortages, inflationary cost pressures, material cost increases, demand volatility, and logistics and capacity constraints, any of which may have a material adverse effect on the Company's business, results of operations and financial condition. All such factors are difficult to predict and are beyond the Company's control. Additional factors that could cause results to differ materially from those described above can be found in Wesco's most recent Annual Report on Form 10-K and other periodic reports filed with the U.S. Securities and Exchange Commission.