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

Mar 13, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMERICAN TOWER CORP /MA/ (AMT)
CIK: 0001053507
Period of Report: 2018-03-10

Reporting Person: HESS WILLIAM H (EVP, Int'l. Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-03-10	Common Stock	F	13060	$143.58	Disposed	92721	Direct
2018-03-12	Common Stock	A	11856	—	Acquired	104577	Direct
2018-03-12	Common Stock	S	28291	$145.28	Disposed	76286	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3662	Indirect
Common Stock	178	Indirect

Footnotes

F1: Shares delivered to the issuer for the payment of withholding taxes in connection with the vesting of restricted stock units ("RSUs") and performance stock units previously granted under the 2007 Equity Incentive Plan, as amended (the "Plan").

F2: These RSUs were granted pursuant to the Plan and vest in 25% cumulative annual increments beginning March 12, 2019. Each RSU respresents a contingent right to receive one share of Common Stock.

F3: Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $145.23 to $145.44 per share.

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