ATN International, Inc.

We provide digital infrastructure and communications services in the United States, primarily in the western US, the Navajo Nation and Alaska, and internationally, including Bermuda and the Caribbean region. We focus on smaller markets, many of which are rural or remote, that have a growing demand for connectivity services. Through our operating subsidiaries, we primarily provide: (i) fixed and mobile telecommunications connectivity to residential, business and government customers, including a range of high-speed internet and data services, fixed and mobile wireless solutions, and video and voice services; and (ii) carrier communications services, such as communications tower facilities to large business and government customers, and terrestrial and submarine fiber optic transport.

About the Company

We are a leading provider of digital infrastructure and communications services with a focus on rural and remote markets in the United States, and internationally, including Bermuda and the Caribbean region.

We have developed significant operational expertise and resources that we use to augment our capabilities in our local markets. With this support, our operating subsidiaries can improve their quality of service with greater economies of scale and expertise than would typically be available in the size markets we operate in. We provide management, technical, financial, regulatory, and marketing services to our operating subsidiaries and typically receive a management fee calculated as a percentage of their revenues, which is eliminated in consolidation. We also actively evaluate investment opportunities and other strategic transactions, both domestic and international, and generally look for those that we believe fit our profile of telecommunications businesses while keeping a focus on generating excess operating cash flows over extended periods of time. We use the cash generated from our operations to maintain an appropriate ratio of debt and cash on hand and to re-invest in organic growth, to fund capital expenditures, to return value to our stockholders through dividends or stock repurchases, and to make strategic investments or acquisitions.

For further information about our financial segments and geographical information about our operating revenues and assets, see Notes 1 and 14 to the Consolidated Financial Statements included in this Report.

As of December 31, 2024, we offered the following types of services to our customers:

Through December 31, 2024, we identified two operating segments to manage and review our operations, as well as to support investor presentations of our results. These operating segments are as follows:

The following chart summarizes the operating activities of our principal subsidiaries, the segments in which we reported our revenue and the markets we served during 2024:

Our principal corporate offices are located at 500 Cummings Center, Suite 2450, Beverly, Massachusetts, 01915. The telephone number at our principal corporate offices is (978) 619-1300.

Available Information

We file with or submit to the SEC our annual, quarterly, current reports, proxy statements and other information meeting the informational requirements of the Securities Exchange Act of 1934, as amended (“the Exchange Act”). We make available, free of charge, on our website our proxy statement, annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports and other publicly filed information available as soon as reasonably practicable after we electronically file such material with, or furnish it to the SEC. Our Internet address where these documents and other information can be found iswww.atni.com. Information contained on our website is not incorporated by reference into this Report, and you should not consider that information to be part of this Report. Our

annual, quarterly, periodic and current reports, proxy statements and other public filings are also available free of charge on the EDGAR Database on the SEC's Internet website at www.sec.gov.

US Telecom Segment

Our US Telecom segment generates fixed, carrier, mobility and managed services revenues in Alaska and parts of the western United States.

In Alaska, we own approximately 52% of the common equity of the operating company, Alaska Communications, and control its operations and management. Our co-investors in Alaska Communications, Freedom 3 Capital, LLC as well as other institutional investors (collectively the “Freedom 3 Investors”), collectively own the remaining 48% of the common equity of Alaska Communications.

In November 2022, we acquired the issued and outstanding stock of Sacred Wind Enterprises, Inc. (“Sacred Wind”), a rural telecommunications provider in New Mexico (the “Sacred Wind Transaction”). As part of the Sacred Wind Transaction, we paid a combination of cash and equity for Sacred Wind, resulting in the Sacred Wind stockholders becoming minority owners in the new business formed by combining Sacred Wind with our existing operations in the western United States, Commnet. Beginning on November 7, 2022, the results of the Sacred Wind Transaction are included in our US Telecom segment.

Revenues from our US Telecom segment were approximately 48% of our consolidated revenues for fiscal years 2024 and 2023.

Carrier Services

Carrier Services.* In Alaska, we provide wholesale voice and internet connectivity to carrier customers. In the western United States, we provide wholesale mobile voice and data roaming services in rural markets and wholesale transport services to *national, regional, local and select international wireless carriers as part of our carrier services as well as tower rental, backhaul and maintenance services. Our largest wholesale networks are located principally in the western United States.

In Alaska, we provide connectivity to our wholesale customers, either through direct sales of wholesale transport over our terrestrial or subsea networks or by entering into transactions whereby we agree to build, host or maintain networks on behalf of another carrier over a contracted term.

In the western United States, we provide network infrastructure services as part of our expanded carrier services, such as tower leasing and transport facilities to our carrier partners, to supplement our historic revenue base. By the end of 2024, we substantially completed the build of AT&T’s network for the First Responder Network Authority (“FirstNet”). Ongoing, we are providing equipment and site maintenance and high-capacity transport from these FirstNet cell sites to AT&T’s core network for an initial term ending in 2031. In March of 2025, we amended the FirstNet agreement to extend the deadline for completing the build requirements. In 2023, we signed our second major Carrier Managed Services (“CMS”) agreement with Verizon to build out a large network to support their customer base. We expect the Verizon build to be substantially complete by the end of 2025.

We also have roaming agreements with each of the three US national wireless network carriers (AT&T, T-Mobile, and Verizon Wireless) along with several other wireless service providers. Other than these agreements with the national carriers, our standard roaming agreements are usually terminable within 90 days. While we continue to provide services pursuant to these roaming agreements, our business focus has shifted away from traditional roaming and toward a network infrastructure model of carrier services.

*Sales and Marketing.*Our wholesale transport customers are predominately communications carriers such as local exchange carriers, wireless carriers, internet service providers and interstate integrated providers. Our services

are mainly sold through direct and inside sales. Our business customers select from our wide range of service offerings tailored to meet their needs.

We believe that our ability to deliver reliable, high capacity backhaul across multiple provider footprints, both from licensed fixed wireless microwave and fiber access solutions, creates value for our customers who are typically unable to scale their rural access capacities as rapidly and successfully as they can in less remote markets. We are investing in the expansion of our regional fiber and network asset footprint, and in enhanced network reliability and route diversity, in the expectation that our carrier customers will have greater demand for higher capacity, higher reliability and lower latency backhaul to support their own investments in network deployments.

Services. In Alaska, we provide fiber broadband and managed IT services, offering technology and service-enabled customer solutions to business and wholesale customers in and out of Alaska. We also provide telecommunication services to consumers in the most populated communities throughout the state. Our facilities-based communications network connects to the contiguous states via our two diverse undersea fiber optic cable systems. We provide high-capacity data networking, internet connectivity, voice communications and IT Services. Networking services include Ethernet and IP routed services as well as switched and dedicated voice services. In addition, we offer other value-added services such as network hosting, managed IT services and long-distance services. Our network is among the most expansive in Alaska and forms the foundation of service to our customers. We operate in a largely two-player terrestrial wireline market and our customers are primarily business customers.

In the western United States, we provide fiber and fixed wireless services to business customers such as schools, libraries, mine operators and state and local governments as well as residential customers. Our focus in the western United States is to continue to build-out our residential and commercial broadband services.

Network. We provide communications and IT solutions that connect Alaskans, as well as customers in the continental United States, to the world. This is based on an extensive facilities-based wireline telecommunications network in Alaska that we operate. We continually upgrade our network to provide higher levels of performance, higher bandwidth speeds, increased levels of security and additional value-added services for our customers. We operate significant terrestrial and submarine fiber miles which serve as the backbone of our network with a focus on reaching government and large business customers. Our network is extensive within Alaska’s urban areas and connects our largest markets, including Anchorage, Fairbanks and Juneau with each other and the contiguous states as well as many rural areas. Residential broadband customers are served in Alaska with a mix of fiber-driven broadband and copper-based DSL internet access.

We own and operate two undersea fiber optic cable systems, AKORN® and Northstar, that provide diverse routing from our Alaskan network to our facilities in Oregon and Washington designed to serve the critical communications requirements of our internal companies and the requirements of our external customers. Through our landing stations in pacific northwest, we also provide an at-the-ready landing point for other large fiber optic cables, and their operators, connecting the US to networks in Asia and other parts of the world.

Our terrestrial fiber network on the North Slope of Alaska allows us to provide broadband solutions to the oil and gas sector and to advance our sales of managed IT services. Rural healthcare, education, and business customers are served by a satellite earth station network utilizing a combination of Geosynchronous Equatorial Orbit (“GEO”) and low earth orbit (“LEO”) satellite capacity. These satellite services provide internet and WAN backhaul connectivity to our customers.

In the western United States, we have deployed, and are working to deploy more, carrier-grade fiber optic networks strategically throughout our markets to continue to serve government, education, healthcare, business, consumer and tribal customers in Arizona, Nevada, New Mexico, Colorado and Utah. We are continuing to expand our capacity offerings with a focus on enhancing our owned and leased transport facilities. The expansion of our network anchored by

new fiber deployments is facilitating a long-held vision for reducing reliance on limited capacity microwave backhaul and enabling new wholesale agreements with additional national and regional carriers for both lit and dark fiber services.

*Competition.*In Alaska, we face competition in our markets from larger competitors with substantial resources. For traditional voice and broadband services, we compete with GCI and AT&T on a statewide basis, and smaller providers such as Matanuska Telephone Association, Inc., a co-op owned telephone and internet service provider operating in the Matanuska Valley region of Alaska, on a more local basis.

In the western United States, we experience competitive pressures from ILEC providers such as AT&T, Comcast, Windstream Lumen and Frontier along with their channel partners and other smaller regional providers and cooperatives. Similarly, national fiber providers such as Zayo also offer our customers services and employ vast wholesale channel solutions. Our ability to offer full-service solutions across multiple LEC service areas and very remote sites back to mobile telephone switching offices continues to be a market differentiator and a key driver of our success.

Our fixed services in the United States also face additional competitive pressure from the continued development and commercialization of LEO satellite technologies with the capacity for providing high-quality data services to our customers.

Mobility Services

*Mobility Services.Historically, we offered mobile services to retail customers in certain rural markets already covered by our wholesale *networks in the western United States. During 2024, we transitioned our focus to carrier services and at the end of the year, we ceased providing retail mobile services under our own brand to retail customers.

Replace and Remove Program. In July 2022, we were approved to participate in the Federal Communication Commission’s Secure and Trusted Communications Networks Reimbursement Program (the “Replace and Remove Program”), designed to reimburse providers of advanced communications services for reasonable costs incurred in the required removal, replacement, and disposal of communications equipment and services in their networks that has been deemed to pose a national security risk. Pursuant to the Replace and Remove Program, our eligible subsidiaries in the western United States and in the US Virgin Islands were initially allocated up to approximately $207 million under the Replace and Remove Program, however, in December 2024 this program was fully funded for an increased allocation to the Company of approximately $517 million. The Replace and Remove Program requires each of our participating subsidiaries to complete the project no later than a specified deadline, which is currently in the third quarter of 2025. As of December 31, 2024, we have received approximately $131 million in reimbursements under the Replace and Remove Program. For a discussion of our risks in completing the project on the timeline and currently allocated budget, please see “We are reliant on government funding to execute on the FCC’s Replace and Remove program” in our Risk Factors.

*Network and Operations.*We provide wireless communications network products and services with owned and leased cellular, PCS, BRS, EBS, AWS, and Citizens Broadband Radio Services (“CBRS”) spectrum. Our networks are comprised of base stations and radio transceivers located on owned or leased towers and buildings, telecommunications switches and owned or leased transport facilities. We design and construct our network in a manner intended to provide high-quality service to substantially all types of compatible wireless devices.

We operate high-capacity, carrier-class digital wireless switching systems that are capable of serving multiple markets through a mobile telephone switching office and centralized equipment used for network and data management that is located in high-availability facilities supported by multiple levels of power and network redundancy. Our systems are designed to incorporate Internet Protocol (IP) packet-based Ethernet technology, which allows for increased data capacity and a more efficient network. Interconnection between the mobile telephone switching office and the cell sites utilizes Ethernet technology over fiber or microwave links for virtually all of our sites.

International Telecom Segment

Our International Telecom segment generates fixed, carrier, mobility and managed services revenues in Bermuda, the Cayman Islands, Guyana and the US Virgin Islands. Revenues from our International Telecom segment were approximately 52% of our consolidated revenues for fiscal years 2024 and 2023.

During 2024, we took significant steps to integrate and align management across our international markets, thereby driving efficiencies and advancing the shared mission of these markets. As part of these efforts, we consolidated our international management team and developed new shared branding across the segment. We launched our new brand, Brava, in our four international markets and in the Caribbean region generally. Brava is focused on the delivery of high-quality business, managed and connectivity solutions to government and large business customers. We also introduced unified branding across two of our networks; now, we sell fixed and mobility services under the “One Communications” brand in both Bermuda and Guyana.

High-Speed Data Services and Networks. We offer high-speed broadband and data connectivity services to residential and business customers in* *all our International Telecom markets. We provide a number of broadband internet plans with varying speeds to address different customer needs and price requirements in our various markets. As of December 31, 2024, we had approximately 203,200 broadband customers across our international markets and approximately 69% of those customers had access to high-speed networks.

Our high speed data services are delivered over fiber to the premises using fiber-optic and hybrid fiber coaxial cable (“HFC”) networks throughout our international markets. We make efforts to construct our high speed networks with durable materials and routes redundancies that are designed to withstand the climate of the regions, including challenges such as high winds. In Guyana, we are working to migrate customers in Guyana from the legacy copper network and its DSL broadband internet service to either fiber or fixed wireless networks.

Voice Services and Digital Switching.We offer fixed voice services that include local exchange, regional and long distance calling and voice messaging services to residential, government and business customers in Bermuda, Guyana, the Cayman Islands and the US Virgin Islands. With respect to our international long-distance business, we also collect payments from foreign carriers for handling international long-**distance calls originating from the foreign carriers’ countries and terminating on our network. We also make payments to foreign carriers for international calls originating on one of our networks and terminating in the foreign carrier’s countries and collect from our subscribers or a local originating carrier a rate that is market-based or set by regulatory tariff. All fixed access lines in our network are digitally switched from our switching centers in the US Virgin Islands, Bermuda, Cayman Islands and Guyana. Our switching centers in these markets enable dedicated monitoring of our network designed to ensure quality and reliable service to our customers.

Video services. We offer video services in Bermuda, the Cayman Islands, and the US Virgin Islands. We have several offerings available to our video customers, including basic and tiered local and cable TV channels grouped into various content categories, such as news, sports and entertainment.

Sub-Sea Fiber Networks. Our international voice and data networks link with the rest of the world through undersea fiber**-**optic cables in the Caribbean and Atlantic regions. These cables are crucial arteries that supply access to communications services for islands and remote markets like the ones in which we operate. Our sub-sea fiber connectivity utilizes physically diverse routes, designed to supply resilient services to our customers. Our sub-sea fiber network is comprised of both owned assets (through memberships of certain consortia) and assets leased from third parties.

*Sales and Marketing.*Our fixed services are sold through five main distribution channels: digital, company owned and operated retail/pop-up retail, authorized dealers and agents, direct sales, and inside sales. Business and residential

customers are able to purchase any of our standalone or bundled data, managed services, security services, and voice services through any of our above channels. We are seeking to grow and protect our existing business customer base with our Brava service offerings, which are provided through a simplified bundling approach that enhances our value proposition and brand position in our markets. We have invested in a number of Brava sales support and delivery resources to support subscriber growth and enhance delivery quality.

*Competition.We compete with a limited number of other providers, including Digicel, Liberty Latin America, and individual newer entrants in select markets, with respect to various services. We *believe our breadth of services and regional strategy to strengthen and enhance our business offerings provide us with a strong competitive position and the ability to win and retain an economically viable share of our markets.

Mobility

We provide mobile, data, and voice services to retail and business customers in Bermuda, Guyana and in the US Virgin Islands. We also provide roaming services for many of the largest US providers’ and other international operators’ customers visiting these locations. As of December 31, 2024, we had approximately 389,000 mobile subscribers in our International Telecom segment.

*Products and Services.*A significant majority of our international customers use prepay plans, which require them to pay in advance for our mobile services. These plans allow customers to purchase a specific amount of voice minutes, text messages, or data for a specified period of time before usage. A smaller minority of customers subscribe to our postpaid plans that allow customers to select a plan with voice minutes, text messaging, a given amount of data and other features that recur on a monthly basis and are billed at the end of the service period.

*Network and Operations:*We offer our mobility services over 4G (LTE) in all of our markets (other than in the Cayman Islands) with emerging 5G in Bermuda and the US Virgin Islands. We own and operate base stations on owned and leased sites throughout our international markets. Except for VoLTE, which has components in each market and leverages shared components in Miami and Denver, all of our mobile networks have their core supporting facilities in the home network in the US Virgin Islands, Bermuda and Guyana. Our local Network Operations Centers (“NOCs”) provide dedicated monitoring of our networks and are designed to ensure that we have continuous monitoring of all our wireless and wireline facilities.

The transport networks in all the markets are primarily fiber based with route diversity provided by the deployment of fiber rings where possible and supplemental microwave deployments. The vast majority of the networks are IP based utilizing MPLS for redundancy to provide high availability networks. Standby power is provided by back up battery and generators. As part of our three-year capital investment strategy, we have made upgrades designed to enhance the resiliency of our network. We have standardized business continuity and disaster recovery plans and engaged in regular reviews and testing of those plans throughout the markets. Connection between these markets and the rest of the world is principally through subsea fiber networks described in our “*International Telecom – Fixed Services –*Sub-Sea Fiber Networks” section above.

*Sales and Marketing.*We provide mobile services, mobile connectivity devices and account management through five main distribution channels: digital, company owned retail/pop-up retail, authorized dealers/agents, direct sales, and inside sales. Business and residential customers are able to purchase any of our services, prepaid mobile, postpaid mobile, and mobile data, through any of the above channels. Customers are also able to purchase devices and accessories to enhance their services through these same channels. We offer a full suite of mobile devices and add-on accessories, similar to what is typically available in most other countries. Our sales channels are strategically located throughout our service areas, staffed by trained, branded, and supported sales and service representatives.

*Handsets and Accessories.We offer a diverse line of wireless devices and accessories designed to meet both the personal and *professional needs of our customers. These devices support a variety of wireless connectivity technologies that are deployed across our various markets. Our device assortment includes a wide range of smartphones including those featuring the Android™ and iOS™ operating systems in addition to a full line of feature phones, wireless

hotspots and various wireless solutions for small businesses. To complement our phone offerings, we sell a complete range of original equipment manufacturer and after**-market accessories that allow our customers to personalize their wireless experience, including phone protection, battery charging solutions and Bluetooth hands-**free kits.

*Competition.We believe we compete for wireless retail customers in our international markets based on features, price, *technology deployed, network coverage (including through roaming arrangements), quality of service and customer care. We compete against Digicel and Liberty Latin America in the Caribbean region, other smaller local providers, and in the US Virgin Islands, against one or more US national operators or mobile virtual network operators.