MACNAB CRAIG 4

What Happened
Craig MacNab, a director of American Tower Corp (AMT), received a grant of 1,209 restricted stock units (RSUs) on March 10, 2026. The filing reports an acquisition price of $0.00 for the award (code A). Each RSU represents a contingent right to one share of common stock and the units were granted under the company’s 2007 Equity Incentive Plan.

Key Details

• Transaction date: 2026-03-10; reported price: $0.00; units granted: 1,209.
• Vesting: These RSUs vest on March 10, 2027 (footnote F1).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Grant plan: 2007 Equity Incentive Plan (as amended).
• Filing date: 2026-03-12 for a 2026-03-10 transaction — appears to be filed within the normal 2-business-day Form 4 window.
• Transaction code: A = Award/Grant. No 10b5-1 plan, tax withholding, or immediate sale noted in the filing.

Context
RSUs are compensation grants that convert to actual shares only if/when they vest; they are not an open-market purchase or sale and therefore do not directly signal a personal buy or sell decision. The economic value to the insider will depend on AMT’s share price at vesting.