(AMT)

Role: EVP, CFO & Treasurer
Signature: /s/ Mneesha O. Nahata, as attorney-in-fact
Stock symbol: AMT
Transactions as of: Dec 31, 2021
Transactions value $: $18,601
Form type: 5
Date filed: 2/14/2022, 04:25 PM
Previous filing: Jun 3, 2021
Next filing: Jan 18, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMT	Common Stock	Purchase	$4.31K	+18	+0.04%	$239.23	48.5K	Apr 29, 2020	Direct	F1
transaction	AMT	Common Stock	Purchase	$4.49K	+17	+0.04%	$263.98	48.5K	Jul 10, 2020	Direct	F1
transaction	AMT	Common Stock	Purchase	$4.84K	+20	+0.04%	$241.95	48.6K	Oct 16, 2020	Direct	F1
transaction	AMT	Common Stock	Purchase	$4.97K	+21	+0.04%	$236.59	48.6K	Feb 2, 2021	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	The shares reported herein were acquired in a dividend reinvestment plan administered by the reporting person's broker.
F2	The reporting person's purchase of Common Stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 21 shares, with the reporting person's sale of 1,108 shares of common stock at a price of $256.64 per share on June 1, 2021. The reporting person has paid the issuer $428.50, representing the full amount of the profit realized in connection with the short-swing transaction.

Content

The shares reported herein were acquired in a dividend reinvestment plan administered by the reporting person's broker.

The reporting person's purchase of Common Stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 21 shares, with the reporting person's sale of 1,108 shares of common stock at a price of $256.64 per share on June 1, 2021. The reporting person has paid the issuer $428.50, representing the full amount of the profit realized in connection with the short-swing transaction.