Rossi Richard C 4

4 · AMERICAN TOWER CORP /MA/ · Filed Mar 12, 2026

AI-generated summary of this filing

Updated Mar 12, 2026

American Tower (AMT) EVP Richard Rossi Receives RSU Award; Shares Sold for Taxes

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.

Form 4

Period: 2026-03-10

EVP & President, U.S. Tower

Transactions

Footnotes (3)

[F1]These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended (the "Plan"), and vest 1/3rd annually over three years, commencing one year from the date of grant. Each RSU represents a contingent right to receive one share of Common Stock.
[F2]Includes 80 and 40 shares acquired under the issuer's employee stock purchase plan in May 2025 and November 2025, respectively.
[F3]Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs previously granted under the Plan.

Signature

/s/ Marina A. Breed, as attorney-in-fact|2026-03-12

1 file