AMERICAN TOWER CORP /MA/

We periodically become involved in various claims and lawsuits that are incidental to our business. While our management, after consultation with counsel, currently believes the ultimate outcome of these legal proceedings, individually and in the aggregate, will not have a material adverse impact on our consolidated financial position, results of operations or liquidity, litigation is subject to inherent uncertainties. Were an unfavorable ruling to occur, there exists the possibility of a material adverse impact on our financial condition and results of operations.

AT&T Mexico Dispute

We are currently engaged in a legal dispute (the “Arbitration”) with one of our customers in Mexico, AT&T Comunicaciones Digitales, S. de R.L. de C.V. and related entities (collectively, “AT&T Mexico”). AT&T Mexico, which represented approximately $300 million of tenant revenue in 2024, is challenging the calculation of the monthly lease amount established under our Master Lease Agreement with AT&T Mexico (the “AT&T Mexico MLA”), as well as certain other provisions of the AT&T Mexico MLA, seeking rent abatement both retroactively and prospectively, and had been withholding tower rents since the start of 2025. We incurred approximately $19 million of reserves through the third quarter of 2025, and expect approximately $30 million of reserves for the full year, related to this customer. We expect to record future reserves until the Arbitration is settled. We believe we have meritorious defenses to the claims raised in this Arbitration, are vigorously defending the full enforceability of the AT&T Mexico MLA and remain confident in the terms and conditions of the AT&T Mexico MLA. The Arbitration is scheduled for a hearing in August 2026.

On September 23, 2025, we and AT&T Mexico reached an agreement pursuant to which AT&T Mexico will remit payment of the majority of the withheld tower rents and will resume monthly payments of the majority of its owed tower rents going forward. The remainder of the outstanding receivables and the future monthly tower rent amounts not remitted directly to us will be deposited into an irrevocable escrow account, overseen by an independent trustee, to be released in accordance with a final ruling in the Arbitration or by mutual consent of us and AT&T Mexico.

DISH Dispute

On September 24, 2025, one of our U.S. customers, DISH Wireless L.L.C., a subsidiary of DISH Network Corporation (“DISH”), delivered a notice purporting to be excused from its contractual obligations under our Strategic Collocation Agreement entered into in March 2021 (the “DISH SCA”). Despite this notice, to date, DISH has continued to make payments to us under the DISH SCA. We remain confident that DISH has not been excused from its obligations under the DISH SCA, and that the DISH SCA remains in full force and effect. As a result, on October 20, 2025, we filed a complaint in the U.S. District Court for the District of Colorado seeking a declaratory judgment that DISH has not been excused from its obligations under the DISH SCA, that the DISH SCA remains in full force and effect, and that DISH remains required to perform all of its obligations under the DISH SCA.