AMERICAN TOWER CORP /MA/ — Director's Dealing 2017

Nov 15, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2017-11-13

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-11-13	Common Stock	M	34000	$43.11	Acquired	304707	Direct
2017-11-13	Common Stock	S	4600	$150.45	Disposed	300107	Direct
2017-11-13	Common Stock	S	28185	$151.29	Disposed	271922	Direct
2017-11-13	Common Stock	S	1215	$151.88	Disposed	270707	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-11-13	Option to Purchase Common Stock	$43.11	M	34000	Disposed	2020-03-10	Common Stock (34000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1420	Indirect
Common Stock	59817	Indirect

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 10, 2017.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $149.74 to $150.72 per share.

F3: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $150.74 to $151.67 per share.

F4: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $151.74 to $152.21 per share.

F5: The reporting person disclaims beneficial ownership in shares held by children.

F6: This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 10, 2011.