American Tower (NYSE: AMT) SVP gets RSU grant as shares withheld for taxes

Rhea-AI Filing Summary

American Tower senior executive Juan Font reported routine equity compensation activity. On March 10, 2026, he received 8,060 shares of Common Stock as a grant under the company’s equity incentive plan, with RSUs vesting in three annual installments. On March 10 and 11, a total of 2,762 shares were delivered back to the company to cover withholding taxes upon RSU vesting. After these transactions, he directly holds 28,352 shares of Common Stock.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Font Juan

Role SVP, Pres. & CEO, CoreSite

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	928	$182.85	$170K
Grant/Award	Common Stock	8,060	$0.00	--
Tax Withholding	Common Stock	1,834	$186.12	$341K

Holdings After Transaction: Common Stock — 28,352 shares (Direct)

Footnotes (1)

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

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Font Juan

(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, Pres. & CEO, CoreSite

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		8,060(1)	A	$0	31,114	D
Common Stock	03/10/2026		F(2)		1,834	D	$186.12	29,280	D
Common Stock	03/11/2026		F(2)		928	D	$182.85	28,352	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 Juan Font report on this Form 4?

Juan Font reported an equity grant of 8,060 AMT common shares and two tax-withholding dispositions totaling 2,762 shares. These reflect RSU vesting and related tax payments, rather than open-market buying or selling of American Tower stock.

Was the AMT Form 4 transaction a stock sale by Juan Font?

The Form 4 shows tax-withholding dispositions, not open-market sales. A total of 2,762 shares were delivered to American Tower to satisfy withholding taxes tied to restricted stock unit vesting under the company’s equity incentive plan.

What equity award did American Tower grant to Juan Font in March 2026?

American Tower granted Juan Font 8,060 shares of Common Stock on March 10, 2026 as an award under its equity incentive plan. The related footnote states these restricted stock units vest in three equal annual installments starting one year after the grant date.

How many AMT shares does Juan Font hold after these Form 4 transactions?

Following the reported March 2026 transactions, Juan Font directly holds 28,352 shares of American Tower Common Stock. This figure reflects the new equity grant as well as shares delivered back to the company for RSU-related tax withholding obligations.

How are the reported AMT restricted stock units structured for vesting?

The restricted stock units referenced in the Form 4 were granted under American Tower’s 2007 Equity Incentive Plan. They vest one-third annually over three years, beginning one year from the grant date, with each RSU representing one share of Common Stock upon vesting.

Does this AMT Form 4 indicate any remaining derivative or option positions?

The summarized data for this Form 4 shows no derivative transactions or remaining derivative positions. All reported entries involve non-derivative Common Stock tied to RSU grants and related tax-withholding share deliveries under American Tower’s equity incentive plan.