American Tower (AMT) executive covers taxes by surrendering shares

Rhea-AI Filing Summary

American Tower Corporation reported an insider equity transaction by a senior executive. The SVP, President & CEO of CoreSite delivered 419 shares of American Tower common stock to the company on 01/03/2026 to cover withholding taxes owed on the vesting of previously granted restricted stock units under the 2007 Equity Incentive Plan.

After this tax-withholding transaction, the executive beneficially owns 23,054 shares of American Tower common stock, which includes 48 shares acquired through the company’s employee stock purchase plan in November 2025. The filing is a routine disclosure of equity compensation and related tax settlement rather than an open-market sale.

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^*

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)
01/03/2026

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	01/03/2026		F(1)		419	D	$174.8	23,054(2)	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. Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of restricted stock units previously granted under the 2007 Equity Incentive Plan, as amended.

2. Includes 48 shares acquired under the issuer's employee stock purchase plan in November 2025.

Remarks:

	/s/ Marina A. Breed, as attorney-in-fact	01/06/2026
	** 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 transaction did AMERICAN TOWER CORP (AMT) disclose in this Form 4?

The filing reports that the SVP, President & CEO of CoreSite delivered 419 shares of American Tower common stock to the company on 01/03/2026 to pay withholding taxes on vested restricted stock units.

How many AMERICAN TOWER CORP (AMT) shares does the executive own after this transaction?

Following the reported transaction, the executive beneficially owns 23,054 shares of American Tower common stock.

Was this AMT insider transaction an open-market sale of shares?

No. The 419 shares were delivered to the issuer for payment of withholding taxes related to the vesting of restricted stock units, rather than sold in the open market.

What plan were the AMT restricted stock units granted under?

The restricted stock units that vested and triggered the tax withholding were granted under American Tower’s 2007 Equity Incentive Plan, as amended.

Does the AMT executive’s reported ownership include shares from an employee stock purchase plan?

Yes. The 23,054 shares beneficially owned include 48 shares acquired under American Tower’s employee stock purchase plan in November 2025.

Who is the reporting person in this AMT Form 4 filing and what is their role?

The reporting person is an officer of American Tower, serving as SVP, President & CEO, CoreSite, and the filing is made as a Form 4 by one reporting person.