American Tower Corporation (NYSE: AMT) today announced year-end tax reporting information for its 2018 distributions. Stockholders are urged to consult with their personal tax advisors as to their specific tax treatment.

American Tower Corporation Common Stock
CUSIP 03027X100
Ticker Symbol: AMT

Record Date			Payment Date			Cash Distribution (per share)			Ordinary Taxable Dividends (per share)			Qualified Taxable Dividends (1) (per share)			Capital Gain Distribution (per share)			Section 199A Dividends (per share)
04/11/2018			04/27/2018			$0.750000			$0.750000			$0.002253			$0.000000			$0.747747
06/19/2018			07/13/2018			$0.770000			$0.770000			$0.002313			$0.000000			$0.767687
09/28/2018			10/17/2018			$0.790000			$0.790000			$0.002373			$0.000000			$0.787627
12/27/2018			01/14/2019			$0.840000			$0.840000			$0.002524			$0.000000			$0.837476

(1) Included in Ordinary Taxable Dividends

American Tower Corporation Depositary Shares, each representing a 1/10^th ownership interest in a share of 5.50% Mandatory Convertible Preferred Stock, Series B
CUSIP 03027X407
Ticker Symbol: AMTPRB

Record Date			Payment Date			Cash Distribution (per share)			Ordinary Taxable Dividends (per share)			Qualified Taxable Dividends (1) (per share)			Capital Gain Distribution (per share)			Section 199A Dividends (per share)
01/18/2018			01/18/2018			$0.756440*			$0.756440			$0.002273			$0.000000			$0.754167
02/01/2018			02/15/2018			$1.375000			$1.375000			$0.003780			$0.000000			$1.371220

*This represents a deemed distribution as a result of a conversion rate adjustment triggered on January 18, 2018
(1) Included in Ordinary Taxable Dividends

Note: For the tax year ended December 31, 2018, there were no unrecaptured section 1250 gains or non-dividend distributions.

This information represents final income allocations.

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 170,000 communications sites. For more information about American Tower, please visit www.americantower.com.

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Igor Khislavsky
Senior Director, Investor Relations
Telephone: (617) 375-7500

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