AMERICAN TOWER CORP /MA/ — Director's Dealing 2016

Sep 20, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2016-09-19

Reporting Person: TAICLET JAMES D JR (Director, Chairman, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-08-22	Common Stock	G	4555	—	Disposed	226517	Direct
2016-09-19	Common Stock	M	40625	$37.70	Acquired	267142	Direct
2016-09-19	Common Stock	S	40625	$108.80	Disposed	226517	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-09-19	Option to Purchase Common Stock	$37.70	M	40625	Disposed	2018-03-17	Common Stock (40625)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1420	Indirect
Common Stock	74887	Indirect

Footnotes

F1: Gift of Common Stock to charitable organizations.

F2: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 4, 2016.

F3: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $108.38 to $109.31 per share.

F4: The reporting person disclaims beneficial ownership in shares held by minor children.

F5: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cummualtive annual increments beginning March 17, 2009.