(AMT)

Reporting relationship: EVP, Chief Admin Ofr, GC & Sec
Issuer ticker: AMT
Reported as of: 28 Oct 2026
Net transaction value: -$290,823
SEC form: 4
Accepted by SEC: 30 Oct 2026, 16:46:50 UTC
Prior SEC filing: 30 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Marina A. Breed, as attorney-in-fact

Filing notes and source

Key filing fact

Dowling Ruth T. filed Form 4 for AMERICAN TOWER CORP /MA/ (AMT) on 30 Oct 2026.

Key facts

This page summarizes Dowling Ruth T.'s Form 4 filing for AMERICAN TOWER CORP /MA/ (AMT).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 30 Oct 2026, 16:46.

Change

Previous filing in this sequence was filed on 30 Jul 2026.
Current net transaction value: -$290,823.

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 0001960785 Primary reporting owner

Dowling Ruth T

Relationship: EVP, Chief Admin Ofr, GC & Sec
Address: 222 BERKELEY STREET, BOSTON
Signature: /s/ Marina A. Breed, as attorney-in-fact
Signature date: 30 Oct 2026

Reported non-derivative transactions

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

AMT transaction

Common Stock

Sale

Transaction value: -$113,932
Shares: -626
Change %: -2.3%
Price: $182.00
Shares after: 27,085
Date: 28 Oct 2026
Ownership: Direct
Footnotes: F1

AMT transaction

Common Stock

Sale

Transaction value: -$176,891
Shares: -952
Change %: -3.5%
Price: $185.81
Shares after: 26,133
Date: 29 Oct 2026
Ownership: Direct
Footnotes: F1

^* 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 1 footnote

Footnote F1

The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 29, 2025.