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

Jan 16, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2014-01-15

Reporting Person: DiSanto Edmund (EVP, Chief Admin Officer & GC)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-01-15	Common Stock	M	25000	$42.95	Acquired	80711	Direct
2014-01-15	Common Stock	S	25000	$83.23	Disposed	55711	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-01-15	Option to Purchase Common Stock	$42.95	M	25000	Disposed	2017-06-01	Common Stock (25000)	Direct

Footnotes

F1: Includes 40 shares acquired under the Company's employee stock purchase plan in November 2013.

F2: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 15, 2013.

F3: This option was granted pursuant to the 2007 Equity Incentive Plan, and is exercisable in 25% cumulative annual increments beginning June 1, 2008.