American Tower (NYSE: AMT) COO awarded RSUs, shares withheld for tax

Rhea-AI Filing Summary

American Tower executive Noel Eugene M, EVP & Chief Operating Officer, reported routine equity compensation activity. On March 10, 2026, he received a grant of 8,167 restricted stock units (RSUs) that vest in equal thirds annually over three years, starting one year from the grant date.

On March 10 and March 11, a total of 3,217 shares of Common Stock were delivered back to the company to cover withholding taxes tied to RSUs vesting. After these tax-withholding dispositions, he directly holds 34,542 shares of American Tower Common Stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Noel Eugene M

(Last) (First) (Middle)

222 BERKELEY STREET

(Street)

BOSTON MA 02116

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AMERICAN TOWER CORP /MA/ [ AMT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/10/2026		A		8,167(1)	A	$0	37,759	D
Common Stock	03/10/2026		F(2)		2,498	D	$186.12	35,261	D
Common Stock	03/11/2026		F(2)		719	D	$182.85	34,542	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

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

Remarks:

	/s/ Marina A. Breed, as attorney-in-fact	03/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What did American Tower (AMT) executive Noel Eugene M report on this Form 4?

He reported a routine equity award and related tax withholding. On March 10, 2026 he received 8,167 restricted stock units, and 3,217 shares were delivered back to American Tower to satisfy withholding taxes from previously granted RSUs that vested.

How many restricted stock units did the AMT COO receive in this transaction?

The COO received a grant of 8,167 restricted stock units. These RSUs were issued under American Tower’s 2007 Equity Incentive Plan and will vest in three equal annual installments, starting one year after the March 10, 2026 grant date, if service-based conditions are met.

Why were shares of American Tower stock disposed of in this Form 4 filing?

The dispositions reflect tax withholding, not open-market sales. A total of 3,217 shares were delivered back to American Tower to pay withholding taxes triggered by the vesting of restricted stock units previously granted under the company’s 2007 Equity Incentive Plan.

What is the vesting schedule for the new American Tower RSU grant?

The 8,167 RSUs vest over three years. One-third of the units vests each year, starting one year from the March 10, 2026 grant date. Each vested RSU entitles the executive to receive one share of American Tower Common Stock upon settlement.

How many American Tower shares does the COO hold after these transactions?

Following the reported grant and tax-withholding share deliveries, the executive directly holds 34,542 shares of American Tower Common Stock. This figure reflects his position after all Form 4 transactions dated March 10 and March 11, 2026 were completed and recorded.

Are the American Tower Form 4 share dispositions open-market sales?

No, the dispositions are for tax withholding only. The filing shows that shares were delivered to American Tower to cover withholding taxes associated with vesting restricted stock units, rather than discretionary open-market sales by the executive on a stock exchange.