AMERICAN TOWER CORP /MA/ — Director's Dealing 2016

May 24, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2016-05-23

Reporting Person: SHARBUTT DAVID E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-23	Common Stock	M	10000	$37.52	Acquired	15124	Direct
2016-05-23	Common Stock	S	10000	$104.35	Disposed	5124	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-23	Option to Purchase Common Stock	$37.52	M	10000	Disposed	2017-03-15	Common Stock (10000)	Direct

Footnotes

F1: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $104.35 to $104.41 per share.