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

Jul 5, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2016-06-30

Reporting Person: DiSanto Edmund (EVP, Chief Admin Ofr, GC & Sec)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-06-30	Common Stock	M	20000	$28.39	Acquired	154962	Direct
2016-06-30	Common Stock	S	20000	$113.50	Disposed	134962	Direct
2016-07-01	Common Stock	G	5300	—	Disposed	129662	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-06-30	Option to Purchase Common Stock	$28.39	M	20000	Disposed	2019-03-10	Common Stock (20000)	Direct

Footnotes

F1: The sales reported on this Form 4 were pursuant to a 10b5-1 trading plan adopted by the reporting person on May 27, 2016.

F2: Gift of Common Stock to a charitable donor advised fund.

F3: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2010.