AMERICAN TOWER CORP /MA/ — Director's Dealing 2012

Mar 14, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2012-03-12

Reporting Person: Lara Gustavo (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-12	Common Stock	A	1009	—	Acquired	9422	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-03-12	Option to Purchase Common Stock	$62.00	A	3590	Acquired	2022-03-12	Common Stock (3590)	Direct

Footnotes

F1: The reporting person was granted 1,009 fully vested Restricted Stock Units (RSUs) pursuant to the 2007 Equity Incentive Plan on March 12, 2012. 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.