(AMT)

Reporting relationship: President and CEO, Director
Issuer ticker: AMT
Reported as of: 04 Mar 2026
Net transaction value: -$6,309,967
SEC form: 4
Accepted by SEC: 06 Mar 2026, 16:23:06 UTC
Prior SEC filing: 27 Feb 2026
Next SEC filing: 12 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Marina A. Breed, as attorney-in-fact

Key filing fact

Vondran Steven O filed Form 4 for AMERICAN TOWER CORP /MA/ (AMT) on 06 Mar 2026.

Key facts

This page summarizes Vondran Steven O's Form 4 filing for AMERICAN TOWER CORP /MA/ (AMT).
5 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 06 Mar 2026, 16:23.

Change

Previous filing in this sequence was filed on 27 Feb 2026.
Current net transaction value: -$6,309,967.

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 0001749304 Primary reporting owner

Vondran Steven O

Relationship: President and CEO, Director
Address: 222 BERKELEY STREET, BOSTON
Signature: /s/ Marina A. Breed, as attorney-in-fact
Signature date: 06 Mar 2026

Reported non-derivative transactions

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

AMT transaction

Common Stock

Options Exercise

Transaction value
Shares: +33,482
Change %: +32%
Price: $94.71^*
Shares after: 138,856
Date: 04 Mar 2026
Ownership: Direct

AMT transaction

Common Stock

Sale

Transaction value: $2,834,284
Shares: -15,084
Change %: -11%
Price: $187.90
Shares after: 123,772
Date: 04 Mar 2026
Ownership: Direct
Footnotes: F1, F2

AMT transaction

Common Stock

Sale

Transaction value: $3,139,132
Shares: -16,625
Change %: -13%
Price: $188.82
Shares after: 107,147
Date: 04 Mar 2026
Ownership: Direct
Footnotes: F1, F3

AMT transaction

Common Stock

Sale

Transaction value: $336,551
Shares: -1,773
Change %: -1.7%
Price: $189.82
Shares after: 105,374
Date: 04 Mar 2026
Ownership: Direct
Footnotes: F1, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMT transaction Derivative

Option to Purchase Common Stock

Options Exercise

Transaction value
Shares: -33,482
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 33,482
Exercise price: $94.71
Footnotes: F5

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2025.

Footnote F2

Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $187.31 to $188.30 per share.

Footnote F3

Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $188.31 to $189.30 per share.

Footnote F4

Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $189.58 to $190.09 per share.

Footnote F5

This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 10, 2017.