Vondran Steven O 4

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

AI-generated summary of this filing

Updated Mar 12, 2026

American Tower (AMT) CEO Steven Vondran Receives RSU Award; Shares Sold for Taxes

What Happened

Steven O. Vondran, President & CEO and Director of American Tower (AMT), was granted 20,955 restricted stock units (RSUs) on 2026-03-10 and concurrently had 17,427 shares delivered back to the company to satisfy withholding tax obligations. The withheld shares were reported as dispositions: 15,269 shares at $186.12 each ($2,841,866) on 2026-03-10 and 2,158 shares at $182.85 each ($394,590) on 2026-03-11. The RSU grant value is recorded as $0.00 per share in the filing (typical for RSU awards).

Key Details

Transaction dates and prices:
- 2026-03-10: Award of 20,955 RSUs (code A) — $0.00 reported per RSU.
- 2026-03-10: 15,269 shares delivered for tax withholding (code F) at $186.12 each = $2,841,866.
- 2026-03-11: 2,158 shares delivered for tax withholding (code F) at $182.85 each = $394,590.
Total shares withheld for taxes: 17,427; total value ≈ $3,236,456.
Shares owned after the transactions: not specified in the provided filing excerpt.
Notable footnotes:
- F1: RSUs granted under the 2007 Equity Incentive Plan vest one-third annually over three years, beginning one year from grant. Each RSU represents a right to one share.
- F2/F3: The dispositions reflect shares delivered to the issuer to pay withholding taxes related to RSU vesting.
Filing: Report filed 2026-03-12 for transactions dated 2026-03-10/11 — within the normal reporting window.

Context

These entries reflect an equity award (RSUs) and a routine sell-to-cover/tax-withholding action, not an open-market sale. Withheld shares are commonly surrendered to satisfy payroll taxes when RSUs vest and do not necessarily indicate the insider is reducing an economic stake beyond tax obligations.
For retail investors: awards show management compensation alignment with equity, while tax-withholding disposals are administrative and not a clear signal of confidence or concern.

Form 4

Period: 2026-03-10

DirectorPresident and CEO

Transactions

Award
Common Stock
[F1]
2026-03-10+20,955→ 126,329 total
Tax Payment
Common Stock
[F2]
2026-03-10$186.12/sh−15,269$2,841,866→ 111,060 total
Tax Payment
Common Stock
[F3]
2026-03-11$182.85/sh−2,158$394,590→ 108,902 total

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]Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs and performance-based restricted stock units previously granted under the Plan.
[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