American Tower (AMT) director Craig Macnab granted 1,209 RSUs

Rhea-AI Filing Summary

MACNAB CRAIG reported acquisition or exercise transactions in this Form 4 filing.

American Tower director Craig Macnab received a stock-based compensation grant. He was awarded 1,209 restricted stock units (RSUs) of Common Stock at no purchase price, increasing his direct holdings to 15,315 shares after the transaction.

The RSUs were granted under the company’s 2007 Equity Incentive Plan, as amended, and will vest on March 10, 2027. Each RSU gives a contingent right to receive one share of American Tower Common Stock upon vesting, aligning the director’s compensation with long-term shareholder value.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MACNAB CRAIG

Role Director

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

Holdings After Transaction: Common Stock — 15,315 shares (Direct)

Footnotes (1)

1. [object Object]

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^*

MACNAB CRAIG

(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	15,315	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.

FAQ

What did American Tower (AMT) director Craig Macnab report on this Form 4?

Craig Macnab reported receiving 1,209 restricted stock units as an equity award. These RSUs increase his direct holdings to 15,315 shares of American Tower Common Stock, reflecting routine stock-based compensation for his role as a director under the company’s equity incentive plan.

How many American Tower (AMT) shares did Craig Macnab hold after this RSU grant?

After the RSU grant, Craig Macnab beneficially owned 15,315 shares of American Tower Common Stock. This figure includes the impact of the 1,209 restricted stock units awarded in the reported transaction, as shown in the post-transaction ownership line of the Form 4.

What are the key terms of Craig Macnab’s RSU grant from American Tower (AMT)?

Macnab received 1,209 restricted stock units granted at no purchase price. The RSUs were issued under the 2007 Equity Incentive Plan, as amended, and each unit represents a contingent right to receive one share of American Tower Common Stock upon vesting.

When do Craig Macnab’s American Tower (AMT) restricted stock units vest?

The 1,209 restricted stock units granted to Craig Macnab vest on March 10, 2027. Vesting means that on that date, subject to the award’s terms, each RSU will convert into one share of American Tower Common Stock deliverable to the director.

Did Craig Macnab buy or sell American Tower (AMT) shares in the market?

This Form 4 does not disclose any open-market purchases or sales. It shows a non-cash grant of 1,209 restricted stock units as compensation, coded as a grant or award acquisition, with no reported market trading activity in American Tower shares.

Under which plan were Craig Macnab’s American Tower (AMT) RSUs granted?

The RSUs were granted pursuant to American Tower’s 2007 Equity Incentive Plan, as amended. This plan governs stock-based compensation awards such as restricted stock units for directors and other eligible participants, aligning their interests with long-term company performance.