AMERICAN TOWER (AMT) SVP gets RSU grant, delivers shares for tax withholding

Rhea-AI Filing Summary

AMERICAN TOWER CORP (AMT) senior vice president and chief accounting officer Robert Joseph Meyer reported equity compensation and related tax withholding transactions in company stock. On March 10, 2026, he received a grant of 4,030 shares of Common Stock as a stock award under the 2007 Equity Incentive Plan. These restricted stock units vest in three equal annual installments starting one year after the grant date, with each unit representing one future share.

To cover withholding taxes on previously granted RSUs vesting under the plan, 1,368 shares were delivered back to the company on March 10, 2026 at a price of $186.12 per share, and 684 shares on March 11, 2026 at $182.85 per share. After the latest tax-withholding disposition, Meyer directly owns 26,439 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

OMB APPROVAL

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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^*

Meyer Robert Joseph

(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)
	SVP & Chief Accounting 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		4,030(1)	A	$0	28,491	D
Common Stock	03/10/2026		F(2)		1,368	D	$186.12	27,123	D
Common Stock	03/11/2026		F(2)		684	D	$182.85	26,439	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.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions did AMT executive Robert Joseph Meyer report on this Form 4?

Robert Joseph Meyer reported a stock award and related tax withholding transactions in AMERICAN TOWER (AMT) Common Stock. He received 4,030 shares as a grant, and 2,052 shares were delivered back to the company to pay withholding taxes on vesting RSUs.

How many AMT shares did Robert Joseph Meyer receive as an equity grant?

He received 4,030 shares of AMERICAN TOWER (AMT) Common Stock as a grant coded "A". The award consists of restricted stock units that convert into shares over time according to the company’s 2007 Equity Incentive Plan vesting schedule.

Why were some of Robert Joseph Meyer’s AMT shares delivered back to the company?

A total of 2,052 AMERICAN TOWER (AMT) shares were delivered back to the issuer to pay withholding taxes. These tax-withholding dispositions occurred when previously granted restricted stock units vested under the 2007 Equity Incentive Plan and are not open-market sales.

What is the vesting schedule of Robert Joseph Meyer’s new AMT RSU grant?

The new restricted stock units for AMERICAN TOWER (AMT) vest in three equal annual installments. Vesting begins one year from the grant date, with each RSU representing a contingent right to receive one share of Common Stock upon vesting.

How many AMT shares does Robert Joseph Meyer hold after these transactions?

Following the most recent tax-withholding disposition, Robert Joseph Meyer directly holds 26,439 shares of AMERICAN TOWER (AMT) Common Stock. This figure reflects his updated direct ownership after the RSU-related tax deliveries back to the company.

At what prices were AMT shares delivered for tax withholding on Meyer’s RSUs?

Shares used to cover withholding taxes were delivered at two prices. On March 10, 2026, 1,368 AMERICAN TOWER (AMT) shares were delivered at $186.12 per share, and on March 11, 2026, 684 shares were delivered at $182.85 per share.