American Tower director granted 1,209 RSUs

Frank Kenneth R reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 03/12/2026 - 04:16 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Frank Kenneth R reported acquisition or exercise transactions in this Form 4 filing.

American Tower Corp director Kenneth R. Frank received an equity award of 1,209 restricted stock units. The award was granted under the 2007 Equity Incentive Plan and will vest on March 10, 2027. Each restricted stock unit represents a contingent right to receive one share of common stock.

Following this grant, Frank is reported as directly holding 6,188 shares of common stock. This is a compensation-related grant, not an open-market purchase or sale, and therefore reflects routine director equity compensation rather than a discretionary trading decision.

Insider Trade Summary

Grant/Award: 1,209 shares

Grant/Award 1 txn

Insider Frank Kenneth R

Role Director

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

Holdings After Transaction: Common Stock — 6,188 shares (Direct)

Holdings Before and After: Common Stock, 4,979 to 6,188 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

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What did American Tower (AMT) director Kenneth R. Frank acquire in this Form 4?

Kenneth R. Frank received an award of 1,209 restricted stock units from American Tower. These units are part of his equity compensation and will convert into the same number of common shares if the vesting conditions are met on the stated vesting date.

When do Kenneth R. Frank’s new American Tower (AMT) restricted stock units vest?

The 1,209 restricted stock units vest on March 10, 2027. At vesting, each RSU entitles Frank to receive one share of American Tower common stock, assuming he satisfies the applicable vesting conditions under the company’s 2007 Equity Incentive Plan.

How many American Tower (AMT) shares does Kenneth R. Frank hold after this Form 4 transaction?

After this award, Kenneth R. Frank is shown as directly holding 6,188 shares of common stock. This figure reflects his reported direct ownership following the grant of 1,209 restricted stock units that are scheduled to vest in March 2027.

Was cash paid for the 1,209 American Tower (AMT) shares reported in this Form 4?

No cash was paid by Kenneth R. Frank for this award; the price per share is reported as $0.0000. The shares are being granted as restricted stock units under American Tower’s 2007 Equity Incentive Plan as part of his director compensation.

Are the 1,209 units in the American Tower (AMT) Form 4 actual shares or restricted stock units?

The filing footnote clarifies they are restricted stock units (RSUs) granted under the 2007 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of American Tower common stock upon vesting on March 10, 2027.

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

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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^*

Frank Kenneth R

(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	6,188	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.