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

Dec 4, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2012-11-30

Reporting Person: DYKES RONALD M (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-11-30	Common Stock	M	12500	$42.95	Acquired	29850	Direct
2012-11-30	Common Stock	S	12500	$75.00	Disposed	17350	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-11-30	Option to Purchase Common Stock	$42.95	M	12500	Disposed	2017-06-01	Common Stock (12500)	Direct