Insider Transaction (Form 4)

American Tower Corporation's subsidiary sold 2,288,621 shares of AST SpaceMobile Class A Common Stock on December 9, 2025, at $69.75 per share through a block trade with Barclays Capital, reducing its direct ownership while retaining 2,170,657 common units convertible into Class A shares. American Tower remains part of a shareholder group under the company's stockholders agreement and continues to hold indirect beneficial ownership through these convertible securities.