Rodney M. Smith - 21 Apr 2022 Form 4 Insider Report for AMERICAN TOWER CORP /MA/ (AMT)

Role: EVP, CFO & Treasurer
Signature: /s/ Marina A. Breed, as attorney-in-fact
Issuer symbol: AMT
Transactions as of: 21 Apr 2022
Net transactions value: -$4,902,616
Form type: 4
Filing time: 25 Apr 2022, 16:24:00 UTC
Previous filing: 15 Mar 2022
Next filing: 03 May 2022
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	$1,952,414	+25,389	+48%	$76.90	77,787	21 Apr 2022	Direct
transaction	AMT	Common Stock	Sale	$6,855,030	-25,389	-33%	$270.00	52,398	21 Apr 2022	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	-25,389	-100%	$0.000000^*	0	21 Apr 2022	Common Stock	25,389	$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 December 14, 2021.
F2	This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 11, 2014.