AMERICAN TOWER CORP /MA/ — Director's Dealing 2011

Feb 14, 2011

SEC Form 5 — Annual Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2010-12-31

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-12-21	Class A Common Stock	J	6000	—	Acquired	8678	Direct
2010-12-22	Class A Common Stock	G	6000	—	Disposed	2678	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	3662	Indirect

Footnotes

F1: These shares were previously reported as indirectly owned through a grantor retained annuity trust.

F2: Gift of Class A Common Stock to various charitable organizations through a donor advised fund.