​ ​ ​ Item 3 Quantitative and Qualitative Disclosures About Market Risk 75 ​ ​ ​ Item 4 Controls and Procedures 76 ​ ​ ​ PART II—OTHER INFORMATION 76 ​ ​ ​ Item 1 Legal Proceedings 76 ​ ​ ​ Item 1A Risk Factors 77 ​ ​ ​ Item 2 Unregistered Sales of Equity Securities and Use of Proceeds 77 ​ ​ ​ Item 5 Other Information 78 ​ ​ ​ Item 6 Exhibits 78 ​ ​ SIGNATURES 79 ​ ​ ​ CERTIFICATIONS ​ ​ ​ ​ ​ ​ ​ 2 Table of Contents Cautionary Statement Regarding Forward-Looking Statements ​ This Quarterly Report on Form 10-Q (or the “Report”) contains forward-looking statements relating to, among other matters, the Company’s future financial performance, business goals and objectives, and results of operations, and management’s plans, expectations and strategy for the future. These forward-looking statements are based on estimates, projections, beliefs, and assumptions and are not guarantees of future events or results. Actual future events and results could differ materially from the events and results indicated in these statements as a result of many factors, including, among others: (1) the general performance of our operations, including operating margins, revenues, capital expenditures, the impact of cost savings initiatives and the retention of and future growth of our subscriber base; (2) our ability to satisfy outstanding conditions to complete subsequent closings with respect to our Tower Portfolio Transaction (as defined below); (3) the timing, manner and extent to which proceeds from the Tower Portfolio Transaction are deployed may be affected by future market conditions, potential changes in tax laws and the Company’s ability to develop corporate investment and strategic opportunities; (4) our reliance on a limited number of key suppliers and vendors for timely supply of equipment and services relating to our network infrastructure; (5) our ability to satisfy the needs and demands of our major carrier customers; (6) our ability to realize expansion plans for our fiber markets; (7) the adequacy and expansion capabilities of our network capacity and customer service system to support our customer growth; (8) our ability to efficiently and cost-effectively upgrade our networks and information technology platforms to address rapid and significant technological changes in the telecommunications industry; (9) continued access to capital and credit markets on terms we deem favorable; (10) government subsidy program availability and regulation of the our businesses, which may impact the our telecommunications licenses, our revenues and operating costs; (11); the impact (if any) of geopolitical instability and US military presence in the Caribbean; (12) ongoing risk of an economic downturn, political, geopolitical and other risks and opportunities impacting our operations, including those resulting from changes and uncertainties related to trade policies or tariff regulations, financial market volatility and disruption, uncertain economic conditions in the US and abroad, inflationary concerns, and other macroeconomic headwinds including increased costs and supply chain disruptions; (13) management transitions, and the loss of, or an inability to recruit skilled personnel in our various jurisdictions, including key members of management; (14) our ability to find investment or acquisition or disposition opportunities that fit our strategic goals; (15) the occurrence of weather events and natural catastrophes and our ability to secure the appropriate level of insurance coverage and the impact of such events on the timing of project implementation and corresponding revenue; and (16) increased competition. These and other additional factors that may cause actual future events and results to differ materially from the events and results indicated in the forward-looking statements above are set forth more fully under Item 1A “Risk Factors” of the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Securities and Exchange Commission (“SEC”) on March 16, 2026, and the other reports the Company files from time to time with the SEC. The Company undertakes no obligation and has no intention to update these forward-looking statements to reflect actual results, changes in assumptions, or changes in other factors that may affect such forward-looking statements, except as required by law. ​ In this Report, the words “the Company,” “we,” “our,” “ours,” “us” and “ATN” refer to ATN International, Inc. and its subsidiaries. This Report contains trademarks, service marks and trade names that are the property of, or licensed by, ATN and its subsidiaries. ​ References to dollars ($) refer to US dollars unless otherwise specifically indicated. ​ ​ ​ ​ 3 Table of Contents PART I—FINANCIAL INFORMATION