Robert D. Hormats

Robert D. Hormats: Former Director at American Tower. What Robert D. Hormats holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.

American Tower (AMT)

Robert D. Hormats holds 9,597 American Tower shares (0.00% of the company), worth about $1.7M at the last price, according to the Form 4 of May 20, 2026.

• Shares held: 9,597 (0.00%), $1.7M — Held in their own name.

Declarations

• American Tower (AMT) — Form 4 of May 20, 2026 (Former Director); 9,597 shares after 0001053507-26-000113
• American Tower (AMT) — Form 4 of Mar 10, 2026: grant or award of 1,209; 9,597 shares after 0001053507-26-000062
• American Tower (AMT) — Form 4 of Mar 10, 2025: grant or award of 1,056; 8,388 shares after 0001053507-25-000052

Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.

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