Rossi Richard C 4

What Happened

• Richard C. Rossi, EVP & President, U.S. Tower at American Tower (AMT), received a grant of 6,448 restricted stock units (RSUs) on 2026-03-10. Following vesting, a total of 2,228 shares were delivered to the issuer to satisfy tax-withholding obligations (reported as dispositions).
• Withholding transactions: 1,544 shares were surrendered on 2026-03-10 at $186.12 each ($287,369) and 684 shares on 2026-03-11 at $182.85 each ($125,069). Total value of shares withheld was $412,438. The RSU grant itself had no purchase price (awarded).

Key Details

• Transaction dates and amounts:
  • 2026-03-10: Award of 6,448 RSUs (code A) — acquisition at $0.00.
  • 2026-03-10: 1,544 shares withheld for taxes (code F) at $186.12 — $287,369.
  • 2026-03-11: 684 shares withheld for taxes (code F) at $182.85 — $125,069.
• Total shares withheld: 2,228; total withholding value: $412,438.
• Shares owned after the transaction: Not specified in the Form 4 filing.
• Footnotes of note:
  • F1: RSUs granted under the 2007 Equity Incentive Plan; vest 1/3 annually over three years, starting one year after grant. Each RSU converts to one common share on vesting.
  • F3: Shares were delivered to the issuer to pay withholding taxes in connection with vesting.
  • F2: Filing includes mention of small ESPP purchases (80 and 40 shares) from 2025.
• Filing timeliness: Report filed 2026-03-12 for transactions on 2026-03-10 and 2026-03-11; appears to be filed within the typical Form 4 reporting window.

Context

• This was an equity award vesting event with shares surrendered to cover withholding taxes (a routine, administrative disposition), not an open-market sale. Such tax-withholding share deliveries (code F) are common when RSUs vest and do not necessarily indicate a change in insider sentiment.