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

11/16/21‡ American Tower Corp./MA           SC TO-C                2:134K CoreSite Realty Corp.             Donnelley … Solutions/FA 
          Appleseed Holdco LLC³
          Appleseed Merger Sub LLC³
11/15/21  American Tower Corp./MA           SC TO-C                3:6M   CoreSite Realty Corp.             Donnelley … Solutions/FA 
          Appleseed Holdco LLC³
          Appleseed Merger Sub LLC³
11/15/21  American Tower Corp./MA           8-K:1,7,8,911/14/21   13:953K                                   Donnelley … Solutions/FA 

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	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 }.
	SC TO-C	Tender-Offer Communication by an Issuer or Third Party — Schedule TO.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.