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

  3/4/19  American Tower Corp./MA           8-K:5       2/27/19    1:38K                                                             
  3/1/19  Sharma Amit                       4          Officer²    1:4K   American Tower Corp./MA           American Tower Corp./MA  
  3/1/19  Hess William H                    4          Officer²    1:5K   American Tower Corp./MA           American Tower Corp./MA  
  3/1/19  DiSanto Edmund                    4          Officer²    1:4K   American Tower Corp./MA           American Tower Corp./MA  
  3/1/19  Bartlett Thomas A                 4          Officer²    1:5K   American Tower Corp./MA           American Tower Corp./MA  
  3/1/19  Taiclet James D Jr.               4          Dir.,Off.²  1:6K   American Tower Corp./MA           American Tower Corp./MA  
 2/27/19  American Tower Corp./MA           10-K       12/31/18  155:24M                                                             
 2/27/19  American Tower Corp./MA           8-K:2,9     2/27/19    2:1.4M                                                            

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¹	Filing/Form Types:  -K
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-K	Annual Report — Form 10-K.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.