American Tower Corporation EVP, Chief Administrative Officer, General Counsel and Secretary Ruth T. Dowling filed a Form 4 on October 30, 2026, disclosing the sale of 1,578 shares of common stock across two transactions on October 28 and October 29, 2026.

Key Highlights

  • First sale: 626 shares disposed of on October 28, 2026, at $182 per share.
  • Second sale: 952 shares disposed of on October 29, 2026, at $185.81 per share.
  • Remaining holdings: Dowling directly held 26,133 shares following the two transactions.
  • 10b5-1 plan: Both sales were made pursuant to a Rule 10b5-1 trading plan adopted by Dowling on October 29, 2025, according to the filing.
  • Reporting person role: Ruth T. Dowling is identified in the filing as EVP, Chief Admin Officer, General Counsel and Secretary of American Tower Corp /MA/ (NYSE:AMT).

Dowling Executes Planned Share Sales Under October 2025 Trading Plan

According to the Form 4 filed with the SEC on October 30, 2026, Ruth T. Dowling, Executive Vice President, Chief Administrative Officer, General Counsel and Secretary of American Tower Corp /MA/ (NYSE:AMT), disposed of a combined 1,578 shares of the company's common stock across two consecutive trading days. The filing indicates both transactions were coded "S" (sale) and both were executed under a pre-established Rule 10b5-1 trading plan.

The first transaction, dated October 28, 2026, involved the disposal of 626 shares at $182 per share, reducing Dowling's directly held position from an implied prior balance to 27,085 shares. The following day, October 29, 2026, an additional 952 shares were sold at $185.81 per share, bringing the directly held total to 26,133 shares. The filing notes that both sales "w[ere] effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 29, 2025."

No derivative securities transactions were reported in Table II of the filing. The Form 4 was signed by Marina A. Breed as attorney-in-fact on October 30, 2026, and indicates the form was filed by one reporting person. The filing also confirms that the form was submitted with the 10b5-1 plan checkbox marked, as required under SEC Instruction 10.

What Was Disclosed

The filing discloses two open-market sales of American Tower common stock by EVP Ruth T. Dowling on October 28 and October 29, 2026, totaling 1,578 shares, executed under a Rule 10b5-1 plan adopted in October 2025, with 26,133 shares remaining directly owned.