AMERICAN TOWER CORP /MA/ — Director's Dealing 2014

Jan 23, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2014-01-21

Reporting Person: Bartlett Thomas A (EVP & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-01-21	Common Stock	M	50001	$43.11	Acquired	71620	Direct
2014-01-21	Common Stock	S	50001	$83.70	Disposed	21619	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-01-21	Option to Purchase Common Stock	$43.11	M	50001	Disposed	2020-03-10	Common Stock (50001)	Direct

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 12, 2013.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $83.55 to $83.87 per share.

F3: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2011.