Exhibit 99.1 Contact: Adam Smith Senior Vice President, Investor Relations and FP&A Telephone: (617) 375-7500 AMERICAN TOWER CORPORATION REPORTS FIRST QUARTER 2025 FINANCIAL RESULTS CONSOLIDATED HIGHLIGHTS (1)(2) 1 _______________ ● Total revenue increased 2.0% to $2,563 million (3) ● Total property revenue increased 0.2% to $2,488 million (3) ● Net income decreased 45.9% to $499 million, primarily due to foreign currency gains and (losses) (4)(5)(6) ● Adjusted EBITDA increased 1.9% to $1,744 million (6) ● ...