AMT: Financial results

Item 2.02 Results of Operations and Financial Condition. On October 27, 2026, American Tower Corporation (the “Company”) issued a press release (the “Press Release”) announcing financial results for the quarter ended September 30, 2026. A copy of the Press Release is furnished herewith as Exhibit 99.1. Exhibit 99.1 is furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such exhibit be deemed incorporated by reference in any filing made by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 99.1 Press Release, dated October 2 7 , 2026 (Furnished herewith). 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. AMERICAN TOWER CORPORATION (Registrant) Date: October 27, 2026 By: /s/ Rodney M. Smith Rodney M. Smith Executive Vice President, Chief Financial Officer and Treasurer