(AMT)

Reporting relationship: EVP & President, U.S. Tower
Issuer ticker: AMT
Reported as of: 10 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 12 Mar 2026, 16:44:21 UTC
Prior SEC filing: 12 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ Marina A. Breed, as attorney-in-fact

Key filing fact

Richard C. Rossi filed Form 4 for AMERICAN TOWER CORP /MA/ (AMT) on 12 Mar 2026.

Key facts

This page summarizes Richard C. Rossi's Form 4 filing for AMERICAN TOWER CORP /MA/ (AMT).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 12 Mar 2026, 16:44.

Change

Previous filing in this sequence was filed on 12 Mar 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002053262 Primary reporting owner

Rossi Richard C

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMT transaction

Common Stock

Award

Transaction value
Shares: +6,448
Change %: +48%
Price: $0.000000^*
Shares after: 19,746
Date: 10 Mar 2026
Ownership: Direct
Footnotes: F1, F2

AMT transaction

Common Stock

Tax liability

Transaction value
Shares: -1,544
Change %: -7.8%
Price: $186.12^*
Shares after: 18,202
Date: 10 Mar 2026
Ownership: Direct
Footnotes: F3

AMT transaction

Common Stock

Tax liability

Transaction value
Shares: -684
Change %: -3.8%
Price: $182.85^*
Shares after: 17,518
Date: 11 Mar 2026
Ownership: Direct
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote 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.

Footnote F2

Includes 80 and 40 shares acquired under the issuer's employee stock purchase plan in May 2025 and November 2025, respectively.

Footnote F3

Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs previously granted under the Plan.