(AMT)

Role: President and CEO, Director
Signature: /s/ Mneesha O. Nahata, as attorney-in-fact
Stock symbol: AMT
Transactions as of: Feb 24, 2022
Transactions value $: $0
Form type: 4
Date filed: 2/28/2022, 06:55 PM
Previous filing: Jun 22, 2021
Next filing: Mar 14, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMT	Common Stock	Award	$0	+17.4K	+8.93%	$0.00	212K	Feb 24, 2022	Direct	F1
holding	AMT	Common Stock						16.9K	Feb 24, 2022	By trusts for children	F2
holding	AMT	Common Stock						193	Feb 24, 2022	By Spouse

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

Explanation of Responses:

Id	Content
F1	Reflects the number of performance-based restricted stock units ("PSUs") earned, as a result of the Compensation Committee's certification to the achievement of performance, under the terms of a PSU award granted on March 11, 2019. These shares will vest at the end of the three-year performance period of such PSU award, and each PSU represents a contingent right to receive one share of Common Stock.
F2	The reporting person disclaims beneficial ownership in shares held by trusts for children.

Content

Reflects the number of performance-based restricted stock units ("PSUs") earned, as a result of the Compensation Committee's certification to the achievement of performance, under the terms of a PSU award granted on March 11, 2019. These shares will vest at the end of the three-year performance period of such PSU award, and each PSU represents a contingent right to receive one share of Common Stock.

The reporting person disclaims beneficial ownership in shares held by trusts for children.