As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 2/25/21  American Tower Corp./MA           10-K       12/31/20  166:30M                                                             
 2/12/21  Bartlett Thomas A                 5          Officer²    1:6K   American Tower Corp./MA           American Tower Corp./MA  

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¹	Filing/Form Types:
	5	Annual Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 5 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.