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

Mar 13, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2013-03-11

Reporting Person: Marshall Steven C. (EVP & President, U.S. Tower)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-11	Option to Purchase Common Stock	$76.90	A	72539	Acquired	2023-03-11	Common Stock (72539)	Direct
2013-03-11	Restricted Stock Units	$	A	18206	Acquired		Common Stock (18206)	Direct

Footnotes

F1: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cumulative annual increments beginning March 11, 2014.

F2: Each Restricted Stock Unit (RSU) respresents a contingent right to receive one share of Common Stock.

F3: This RSU was granted pursuant to the 2007 Equity Incentive Plan, and vests in 25% cumulative annual increments beginning March 11, 2014.