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

Mar 13, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2014-03-12

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-03-12	Common Stock	M	5041	—	Acquired	49564	Direct
2014-03-12	Common Stock	F	2311	$80.84	Disposed	47253	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-03-12	Restricted Stock Units	$	M	5041	Disposed		Common Stock (5041)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5095	Indirect

Footnotes

F1: Each Restricted Stock Unit (RSU) respresents a contingent right to receive one share of Common Stock.

F2: This RSU was granted on March 12, 2012 pursuant to the 2007 Equity Incentive Plan, and vests in 25% cumulative annual increments beginning March 12, 2013. This Form 4 reflects the vesting of this RSU on March 12, 2014 as to 50% of the original grant amount.