AMT: Leadership change · Other company developments

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. (e) On May 20, 2026, at the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of American Tower Corporation (the “Company”), the stockholders of the Company approved the American Tower Corporation 2026 Equity Incentive Plan (the “2026 Equity Plan”), which became effective as of such date. The Board of Directors (the “Board”) of the Company previously adopted the 2026 Equity Plan on March 5, 2026, subject to stockholder approval. Under the 2026 Equity Plan, the Company may grant equity and equity-based awards, including options (including nonqualified stock options and incentive stock options), restricted stock, restricted stock units and other equity-based awards and cash awards, to employees, directors, consultants and advisors of the Company and its majority-owned subsidiaries. The 2026 Equity Plan will be administered by the Compensation and Human Capital Committee of the Board. Subject to adjustment as described therein, the 2026 Equity Plan authorizes the issuance of (i) 12,000,000 new shares of the Company’s common stock, (ii) up to 1,778,230 additional shares of the Company’s common stock if awards under the Company’s 2007 Equity Incentive Plan, as amended, (the “Prior Plan”) expire or otherwise terminate without having been exercised in full, or are forfeited due to failure to vest on or after May 20, 2026 and (iii) a number of shares of the Company’s common stock equal to the number of shares which remain available for issuance under the Prior Plan as of May 20, 2026. The foregoing summary of the 2026 Equity Plan is qualified in its entirety by reference to the detailed summary of the 2026 Equity P