ATN International, Inc. ("ATN", the "Company", "we", "us", and "our") (NASDAQ:ATNI), a leading provider of digital infrastructure and communications services, announced that its subsidiary, Commnet Wireless, LLC and certain of its subsidiaries have completed the initial closing (the "initial closing") of the previously disclosed sale of Southwestern U.S. towers and related operations (the "Tower Portfolio"). to EIP Holdings IV, LLC, an affiliate of Everest Infrastructure Partners, Inc. for $268 million in cash (the "Tower Portfolio Transaction").

Subsequent closings, up to an additional $30 million in proceeds, are expected to occur over the next twelve months, subject to the achievement of specified construction and operational milestones at sites not transferred at the initial closing.

As previously disclosed, the Company will allocate $68 million of the initial closing proceeds to repay borrowings outstanding under its CoBank revolving credit facility.

The Company expects the impact of the initial closing will reduce the remaining seven months of 2026 consolidated and US Telecom segment revenues by $3 million, operating income by $4 million, and Adjusted EBITDA1 by $7 million. As a result, the Company's previously disclosed 2026 full-year Adjusted EBITDA1 outlook of $190 to $200 million is now expected to be $183 million to $193 million.