AMERICAN TOWER CORP /MA/ — Director's Dealing 2015

Aug 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2015-08-17

Reporting Person: HESS WILLIAM H (EVP, Int'l. Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-17	Common Stock	M	7469	$62.00	Acquired	95958	Direct
2015-08-17	Common Stock	M	2531	$50.78	Acquired	98489	Direct
2015-08-17	Common Stock	S	9100	$101.00	Disposed	89389	Direct
2015-08-17	Common Stock	S	900	$101.45	Disposed	88489	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-17	Option to Purchase Common Stock	$62.00	M	7469	Disposed	2022-03-12	Common Stock (7469)	Direct
2015-08-17	Option to Purchase Common Stock	$50.78	M	2531	Disposed	2021-03-10	Common Stock (2531)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3840	Indirect

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2014.

F2: Represents the weighted average price of shares sold in multiple same-day transactions ranging from $100.41 to $101.40 per share.

F3: Represents the weighted average price of shares sold in multiple same-day transactions ranging from $101.41 to $101.51 per share.

F4: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 12, 2013.

F5: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2012.