AMT American Tower Corporation

American Tower Corporation (NYSE: AMT) announced today that the press announcement of its first quarter 2015 results is scheduled to be released to the news services at 7:00 a.m. ET on Thursday, April 30, 2015. In addition, the Company has scheduled a conference call at 8:30 a.m. ET on Thursday, April 30, 2015 to discuss its results.

Conference call details are as follows:

Call Date:                 April 30, 2015 Call Time: 8:30 a.m. ET   Call Dial in:

(877) 586-5042 US/Canada

(706) 645-9644 International Access Code: 19903164   Online Info:

http://www.americantower.com/corporateus/investor-relations/webcasts/index.htm

Live simulcast (listen only) available during the call. Replay available shortly after the conclusion of the call.   An audio replay of the conference call will be available as follows:   Replay Dates: April 30, 2015 11:30 a.m. ET – May 7, 2015 11:59 p.m. ET Replay Dial in: (855) 859-2056 US/Canada (404) 537-3406 International Access Code: 19903164

About American Tower

American Tower, one of the largest global REITs, is a leading independent owner, operator and developer of multitenant communications real estate with a portfolio of over 87,000 communications sites. For more information about American Tower, please visit www.americantower.com.

American Tower CorporationLeah Stearns, 617-375-7500Senior Vice President, Treasurer and Investor Relations