American Tower (NYSE: AMT) CFO gets RSUs and uses shares for tax withholding

Rhea-AI Filing Summary

American Tower executive vice president, CFO and treasurer Rodney M. Smith reported routine equity compensation and related tax withholding transactions in Common Stock. On March 10, 2026, he received a grant of 10,531 restricted stock units (RSUs) that were awarded under the 2007 Equity Incentive Plan and will vest in three equal annual installments, starting one year from the grant date. Each RSU represents a contingent right to one share of Common Stock.

To cover withholding taxes on the vesting of previously granted RSUs and performance-based restricted stock units, 12,433 shares were delivered back to the company at $186.12 per share on March 10, 2026, and a further 1,295 shares at $182.85 per share on March 11, 2026. These F-code dispositions are not open-market sales but share transfers to the issuer for tax obligations. After these transactions, Smith directly holds 92,542 shares of American Tower Common Stock.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Smith Rodney M

Role EVP, CFO & Treasurer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,295	$182.85	$237K
Grant/Award	Common Stock	10,531	$0.00	--
Tax Withholding	Common Stock	12,433	$186.12	$2.31M

Holdings After Transaction: Common Stock — 92,542 shares (Direct)

Footnotes (1)

1. These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended (the "Plan"), and vest 1/3rd annually over three years, commencing one year from the date of grant. Each RSU represents a contingent right to receive one share of Common Stock. Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs and performance-based restricted stock units previously granted under the Plan. Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs previously granted under the Plan.

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^*

Smith Rodney 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, CFO & Treasurer

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		10,531(1)	A	$0	106,270	D
Common Stock	03/10/2026		F(2)		12,433	D	$186.12	93,837	D
Common Stock	03/11/2026		F(3)		1,295	D	$182.85	92,542	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 (the "Plan"), and vest 1/3rd annually over three years, commencing one year from the date of grant. Each RSU represents a contingent right to receive one share of Common Stock.

2. Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs and performance-based restricted stock units previously granted under the Plan.

3. Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of RSUs previously granted under the Plan.

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 insider transactions did AMT CFO Rodney M. Smith report on this Form 4?

Rodney M. Smith reported a grant of 10,531 restricted stock units and two tax-withholding share deliveries totaling 13,728 shares. All transactions involved American Tower Common Stock and reflect equity compensation and related tax payments, not open-market purchases or sales.

How many American Tower shares were granted to AMT CFO Rodney Smith?

Rodney Smith received 10,531 restricted stock units of American Tower Common Stock. The RSUs were granted under the company’s 2007 Equity Incentive Plan and represent a contingent right to receive an equal number of shares as they vest over time.

How many AMT shares were used to cover Rodney Smith’s tax withholding?

A total of 13,728 shares were delivered to American Tower to satisfy tax withholding. This included 12,433 shares at $186.12 per share on March 10, 2026, and 1,295 shares at $182.85 per share on March 11, 2026, related to vesting equity awards.

How do Rodney Smith’s new RSUs in AMT vest over time?

The 10,531 restricted stock units vest in three equal annual installments. Vesting begins one year from the March 10, 2026 grant date, with one-third of the RSUs vesting each year, assuming applicable plan conditions are satisfied.

How many AMT shares does Rodney Smith hold after these transactions?

Following the tax-withholding share deliveries on March 11, 2026, Rodney Smith directly holds 92,542 shares of American Tower Common Stock. This figure reflects his post-transaction position as reported in the Form 4’s non-derivative holdings data.

Were Rodney Smith’s AMT tax-withholding transactions open-market sales?

No. The Form 4 classifies both dispositions with transaction code F, meaning shares were delivered to American Tower to pay withholding taxes on vesting RSUs and performance-based restricted stock units, rather than being sold in open-market transactions.