Exhibit 99.1 Contact: Adam Smith Senior Vice President, Investor Relations and FP&A Telephone: (617) 375-7500 AMERICAN TOWER CORPORATION REPORTS FIRST QUARTER 2024 FINANCIAL RESULTS CONSOLIDATED HIGHLIGHTS First Quarter 2024 ● Total revenue increased 2.4% to $2,834 million ● Property revenue increased 3.3% to $2,804 million ● Net income increased 192.6% to $922 million ● Adjusted EBITDA increased 5.2% to $1,854 million ● Net income attributable to AMT common stockholders increased 173.2% to $917 million ● A ...