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: THOMPSON SAMME L (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-11	Common Stock	A	813	—	Acquired	16393	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-11	Option to Purchase Common Stock	$76.90	A	3239	Acquired	2023-03-11	Common Stock (3239)	Direct

Footnotes

F1: The reporting person was granted 813 fully vested Restricted Stock Units (RSUs) pursuant to the 2007 Equity Incentive Plan on March 11, 2013. Each RSU represented a contingent right to receive one share of Common Stock.

F2: This option was granted pursuant to the 2007 Equity Incentive Plan.