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

Aug 13, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2014-08-11

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-08-11	Common Stock	M	40000	$37.52	Acquired	76497	Direct
2014-08-11	Common Stock	S	39300	$98.95	Disposed	37197	Direct
2014-08-11	Common Stock	S	700	$99.52	Disposed	36497	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-08-11	Option to Purchase Common Stock	$37.52	M	40000	Disposed	2017-03-15	Common Stock (40000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1630	Indirect
Common Stock	100041	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 May 13, 2014.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $98.50 to $99.49 per share.

F3: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $99.50 to $99.53 per share.

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

F5: This option was granted pursuant to the 1997 Stock Option Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 15, 2008.