AMERICAN TOWER CORP /MA/ — Director's Dealing 2018

Nov 21, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2018-11-19

Reporting Person: Bartlett Thomas A (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-11-19	Common Stock	M	19430	$76.90	Acquired	133660	Direct
2018-11-19	Common Stock	M	53908	$81.18	Acquired	187568	Direct
2018-11-19	Common Stock	M	20000	$94.57	Acquired	207568	Direct
2018-11-19	Common Stock	S	93338	$165.00	Disposed	114230	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-11-19	Option to Purchase Common Stock	$76.90	M	19430	Disposed	2023-03-11	Common Stock (19430)	Direct
2018-11-19	Option to Purchase Common Stock	$81.18	M	53908	Disposed	2024-03-10	Common Stock (53908)	Direct
2018-11-19	Option to Purchase Common Stock	$94.57	M	20000	Disposed	2025-03-10	Common Stock (20000)	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 September 5, 2018.

F2: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $165.00 to $165.09 per share.

F3: This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cummualtive annual increments beginning March 11, 2014.

F4: This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cummualtive annual increments beginning March 10, 2015.

F5: This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cummualtive annual increments beginning March 10, 2016.