Exhibit 99.1 Contact: Kate Reeb Senior Director, Investor Relations Telephone: (617) 375-7565 AMERICAN TOWER CORPORATION REPORTS SECOND QUARTER 2025 FINANCIAL RESULTS CONSOLIDATED HIGHLIGHTS (1)(2) Second Quarter 2025 Boston, Massachusetts – July 29, 2025: American Tower Corporation (NYSE: AMT) today reported financial results for the quarter ended June 30, 2025. Steven Vondran, American Tower's Chief Executive Officer, stated, "Demand for our high-quality global portfolio of telecommunications sites contin ...