American Tower COO exercises options, sells shares

American Tower EVP & Chief Operating Officer Noel Eugene M exercised options covering 41,209 shares of common stock on March 2, 2026, converting an option granted under the 2007 Equity Incentive Plan into common shares at an exercise price of $94.71 per share.

Rhea-AI Filing Summary

American Tower EVP & Chief Operating Officer Noel Eugene M exercised options covering 41,209 shares of common stock on March 2, 2026, converting an option granted under the 2007 Equity Incentive Plan into common shares at an exercise price of $94.71 per share.

On the same date, he sold a total of 41,209 common shares in multiple open-market transactions at weighted average prices between $188.82 and $192.19 per share under a Rule 10b5-1 trading plan adopted on February 26, 2025. Following these trades, he directly owns 29,592 common shares, which include small amounts acquired through the employee stock purchase plan.

Insider Trade Summary

Exercise and Sale: 41,209 shares ($3.97M approx. pre-tax spread)

Exercise and Sale 6 txns

Insider Noel Eugene M

Role EVP & Chief Operating Officer

Sold 41,209 shs ($7.87M)

Approx. gross sale proceeds $7.87M

Approx. exercise cost $3.90M

Approx. pre-tax spread $3.97M

Type	Security	Shares	Price	Value
Exercise	Option to Purchase Common Stock	41,209	$0.00	$0.00
Exercise	Common Stock	41,209	$94.71	$3.90M
Sale	Common Stock	5,242	$189.36	$993K
Sale	Common Stock	7,378	$190.29	$1.40M
Sale	Common Stock	21,604	$191.40	$4.14M
Sale	Common Stock	6,985	$192.03	$1.34M

Holdings After Transaction: Option to Purchase Common Stock — 0 contracts (Direct); Common Stock — 29,592 shares (Direct)

Footnotes (7)

1. F1. Includes 73 and 46 shares acquired under the issuer's employee stock purchase plan in May 2025 and November 2025, respectively.
2. F2. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2025.
3. F3. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $188.82 to $189.78 per share.
4. F4. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $189.92 to $190.88 per share.
5. F5. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $190.92 to $191.91 per share.
6. F6. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $191.92 to $192.19 per share.
7. F7. This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 10, 2017.

FAQ

What did AMERICAN TOWER CORP (AMT) executive Noel Eugene M report on this Form 4?

He reported exercising options for 41,209 American Tower common shares and selling 41,209 shares in open-market trades. The transactions occurred on March 2, 2026 and were executed under a pre-established Rule 10b5-1 trading plan adopted in February 2025.

How many AMERICAN TOWER CORP (AMT) shares does Noel Eugene M own after the transactions?

After the reported trades, he directly owns 29,592 American Tower common shares. This figure includes 73 shares and 46 shares previously acquired through the company’s employee stock purchase plan in May 2025 and November 2025, as described in the Form 4 footnotes.

Were the AMERICAN TOWER CORP (AMT) share sales by Noel Eugene M pre-planned?

Yes. The Form 4 states the sales were made under a Rule 10b5-1 trading plan adopted on February 26, 2025. Such plans allow executives to schedule trades in advance, providing a structured framework for selling shares over time.

At what prices were Noel Eugene M’s AMERICAN TOWER CORP (AMT) shares sold?

The reported sales used weighted average prices across multiple trades, ranging from $188.82 to $192.19 per share. Footnotes explain these averages reflect numerous same-day transactions within narrower price bands for each sale line disclosed in the filing.

What stock option activity did the AMERICAN TOWER CORP (AMT) Form 4 disclose?

The filing shows he exercised an option to purchase 41,209 American Tower common shares at an exercise price of $94.71 per share. The option was granted under the 2007 Equity Incentive Plan and became exercisable in 25% annual increments beginning March 10, 2017.

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Accepted by SEC EDGAR 03/04/2026 - 04:20 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).

X

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^*

Noel Eugene M

(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)
	EVP & Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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	03/02/2026		M		41,209	A	$94.71	70,801(1)	D
Common Stock	03/02/2026		S(2)		5,242	D	$189.36(3)	65,559	D
Common Stock	03/02/2026		S(2)		7,378	D	$190.29(4)	58,181	D
Common Stock	03/02/2026		S(2)		21,604	D	$191.4(5)	36,577	D
Common Stock	03/02/2026		S(2)		6,985	D	$192.03(6)	29,592	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
Option to Purchase Common Stock	$94.71	03/02/2026		M			41,209	(7)	03/10/2026	Common Stock	41,209	$0	0	D

Explanation of Responses:

1. Includes 73 and 46 shares acquired under the issuer's employee stock purchase plan in May 2025 and November 2025, respectively.

2. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2025.

3. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $188.82 to $189.78 per share.

4. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $189.92 to $190.88 per share.

5. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $190.92 to $191.91 per share.

6. Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $191.92 to $192.19 per share.

7. This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 10, 2017.

Remarks:

	/s/ Marina A. Breed, as attorney-in-fact	03/04/2026
	** 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.