American Tower director granted 1,209 RSUs

Tanner Bruce L reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Tanner Bruce L reported acquisition or exercise transactions in this Form 4 filing.

American Tower director Bruce L. Tanner received a stock-based award. He was granted 1,209 restricted stock units (RSUs), each representing one share of common stock, at no cash purchase price. After this award, he directly holds 6,940 shares of common stock.

The RSUs were granted under the 2007 Equity Incentive Plan, as amended, and are scheduled to vest on March 10, 2027. This is a compensation-related equity grant rather than an open-market share purchase.

Insider Trade Summary

Grant/Award: 1,209 shares

Grant/Award 1 txn

Insider Tanner Bruce L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,209	$0.00	$0.00

Holdings After Transaction: Common Stock — 6,940 shares (Direct)

Footnotes (1)

1. F1. These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2027. Each RSU represents a contingent right to receive one share of Common Stock.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did American Tower (AMT) director Bruce L. Tanner report on this Form 4?

Bruce L. Tanner reported receiving a stock-based compensation award. He was granted 1,209 restricted stock units, each convertible into one share of American Tower common stock, increasing his direct holdings to 6,940 shares after the transaction.

How many American Tower (AMT) shares did Bruce L. Tanner acquire in this transaction?

He acquired rights to 1,209 shares through restricted stock units. These RSUs represent a contingent right to receive one share of common stock each, granted as equity compensation rather than through an open-market cash purchase.

When do Bruce L. Tanner’s newly granted American Tower (AMT) RSUs vest?

The restricted stock units granted to Bruce L. Tanner vest on March 10, 2027. Vesting means the RSUs convert into actual shares of common stock, assuming the award’s conditions under the 2007 Equity Incentive Plan are satisfied.

What is the nature of Bruce L. Tanner’s American Tower (AMT) transaction price per share?

The reported price per share for this transaction is $0.00 because it is an equity compensation grant. RSUs are typically awarded as part of director or executive pay, not bought on the open market with cash consideration.

How many American Tower (AMT) shares does Bruce L. Tanner hold after this Form 4 transaction?

Following the grant of 1,209 restricted stock units, Bruce L. Tanner is reported to directly hold 6,940 shares of American Tower common stock. This figure reflects his position after the newly awarded RSUs are included in the filing’s totals.

Under which plan were Bruce L. Tanner’s American Tower (AMT) RSUs granted?

The restricted stock units were granted under American Tower’s 2007 Equity Incentive Plan, as amended. This plan authorizes equity-based compensation awards such as RSUs to directors and other eligible participants, aligning their interests with long-term shareholder value.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/12/2026 - 04:19 PM Learn about SEC filing dates

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^*

Tanner Bruce L

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

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		1,209(1)	A	$0	6,940	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, and vest on March 10, 2027. Each RSU represents a contingent right to receive one share of Common Stock.

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.