Officers; Compensatory Arrangements of Certain Officers.

(d) Director Election.>>On June 13, 2017, the Board of
Directors (the Board) of American Tower Corporation (the Company)
elected Grace D. Lieblein as a director and member of its Audit
Committee, effective immediately. In accordance with the Companys
Amended and Restated By-Laws, Ms. Lieblein will serve as a
director until the next Annual Meeting of Stockholders or until
her successor is duly elected and qualified.

Ms. Lieblein most recently served as Vice President, Global
Quality of General Motors Company (GM), a multinational
corporation that designs, manufactures, markets and distributes
vehicles, from November 2014 to December 2015. Ms. Lieblein
joined GM in 1978 and has held a variety of leadership positions
at GM in engineering, supply chain management and international
operations. Ms. Liebleins leadership positions have included
serving as Vice President, Global Purchasing and Supply Chain
from 2012 to 2014, GM Brazil President from 2011 to 2012, GM
Mexico President from 2008 to 2011 and Vehicle Chief Engineer
from 2004 to 2008. Ms. Lieblein is also a director of Southwest
Airlines Co. and Honeywell International Inc.

For her service on the Board, Ms. Lieblein will receive the
Companys standard compensation for non-employee directors.

On June 14, 2017, the Company issued a press release (the Press
Release) announcing the appointment of Ms. Lieblein to the Board,
a copy of which is filed herewith as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits