Richard C. Rossi - 10 Mar 2026 Form 4 Insider Report for AMERICAN TOWER CORP /MA/ (AMT)

Role
EVP & President, U.S. Tower
Signature
/s/ Marina A. Breed, as attorney-in-fact
Issuer symbol
AMT
Transactions as of
10 Mar 2026
Net transactions value
$0
Form type
4
Filing time
12 Mar 2026, 16:44:21 UTC
Previous filing
12 Mar 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Rossi Richard C EVP & President, U.S. Tower 222 BERKELEY STREET, BOSTON /s/ Marina A. Breed, as attorney-in-fact 12 Mar 2026 0002053262

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMT Common Stock Award +6,448 +48% $0.000000* 19,746 10 Mar 2026 Direct F1, F2
transaction AMT Common Stock Tax liability -1,544 -7.8% $186.12* 18,202 10 Mar 2026 Direct F3
transaction AMT Common Stock Tax liability -684 -3.8% $182.85* 17,518 11 Mar 2026 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.