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

Jul 12, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2016-07-08

Reporting Person: Marshall Steven C. (EVP & President, U.S. Tower)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-07-08	Common Stock	M	50000	$44.92	Acquired	139689	Direct
2016-07-08	Common Stock	S	50000	$112.81	Disposed	89689	Direct
2016-07-11	Common Stock	M	50000	$44.92	Acquired	139689	Direct
2016-07-11	Common Stock	S	25000	$113.68	Disposed	114689	Direct
2016-07-11	Common Stock	S	25000	$114.00	Disposed	89689	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-07-08	Option to purchase common stock	$44.92	M	50000	Disposed	2017-12-03	Common Stock (50000)	Direct
2016-07-11	Option to purchase common stock	$44.92	M	50000	Disposed	2017-12-03	Common Stock (50000)	Direct

Footnotes

F1: Amount includes 188 shares acquired under the Company's employee stock purchase plan in May 2016.

F2: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 13, 2016.

F3: Represents the weighted average price of shares sold in multiple same-day transactions ranging from $112.33 to $113.18 per share.

F4: Represents the weighted average price of shares sold in multiple same-day transactions ranging from $113.00 to $113.98 per share.

F5: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning December 3, 2008.