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

Apr 19, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2016-04-15

Reporting Person: Bartlett Thomas A (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-04-15	Common Stock	M	38770	$62.00	Acquired	135199	Direct
2016-04-15	Common Stock	M	16072	$50.78	Acquired	151271	Direct
2016-04-15	Common Stock	S	54842	$105.23	Disposed	96429	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-04-15	Option to Purchase Common Stock	$62.00	M	38770	Disposed	2023-03-12	Common Stock (38770)	Direct
2016-04-15	Option to Purchase Common Stock	$50.78	M	16072	Disposed	2022-03-10	Common Stock (16072)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	193	Indirect

Footnotes

F1: The sales reported on this Form 4 were pursuant to a 10b5-1 trading plan adopted by the reporting person on March 10, 2016.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $104.89 to $105.56 per share.

F3: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cummulative annual increments beginning March 12, 2013.

F4: This option was granted pursuant to the 2007 Equity Incentive Plan and is exercisable in 25% cummulative annual increments beginning March 10, 2012.