SAMME L. THOMPSON - 03 Jan 2023 Form 4 Insider Report for AMERICAN TOWER CORP /MA/ (AMT)

Role: Director
Signature: /s/ Marina A. Breed, as attorney-in-fact
Issuer symbol: AMT
Transactions as of: 03 Jan 2023
Net transactions value: -$205,650
Form type: 4
Filing time: 05 Jan 2023, 15:28:45 UTC
Previous filing: 14 Mar 2022
Next filing: 08 Feb 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMT	Common Stock	Options Exercise	$115,350	+1,500	+6.8%	$76.90	23,599	03 Jan 2023	Direct
transaction	AMT	Common Stock	Sale	$321,000	-1,500	-6.4%	$214.00	22,099	03 Jan 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMT	Option to Purchase Common Stock	Options Exercise	$0	-1,500	-46%	$0.000000	1,739	03 Jan 2023	Common Stock	1,500	$76.90	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 28, 2022.
F2	This option was granted pursuant to the 2007 Equity Incentive Plan, as amended.