AMERICAN TOWER CORP /MA/ — Director's Dealing 2013

Sep 11, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2013-09-09

Reporting Person: TAICLET JAMES D JR (Director, Chairman, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-09-09	Common Stock	M	100000	$31.50	Acquired	200041	Direct
2013-09-09	Common Stock	S	75800	$72.94	Disposed	124241	Direct
2013-09-09	Common Stock	S	24200	$73.81	Disposed	100041	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-09-09	Option to Purchase Common Stock	$31.50	M	100000	Disposed	2016-03-01	Common Stock (100000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1630	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 March 8, 2013.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $72.31 to $73.29 per share.

F3: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $73.31 to $74.04 per share.

F4: The reporting person disclaims beneficial ownership in shares owned by minor children.

F5: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 1, 2007.