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

 5/10/24  Ruggles Lisa                      4          Officer²    1:4K   CoStar Group, Inc.                CoStar Group, Inc.       
  5/9/24  Ruggles Lisa                      144                    1:6K   CoStar Group, Inc.                Morgan Stanley … Svcs/FA 
  5/9/24  Nassetta Christopher J            4          Director²   1:5K   CoStar Group, Inc.                CoStar Group, Inc.       
 4/30/24  Desmarais Michael J               4          Officer²    1:4K   CoStar Group, Inc.                CoStar Group, Inc.       
 4/30/24  Wheeler Scott T                   4          Officer²    1:15K  CoStar Group, Inc.                CoStar Group, Inc.       
 4/26/24  Wheeler Scott T                   144                    1:4K   CoStar Group, Inc.                Morgan Stanley … Svcs/FA 
 4/26/24  Desmarais Michael J               144                    1:4K   CoStar Group, Inc.                Morgan Stanley … Svcs/FA 
 4/26/24  CoStar Group, Inc.                ARS        12/31/23    1:8.5M                                   Donnelley … Solutions/FA 
 4/26/24  CoStar Group, Inc.                DEFA14A                1:787K                                   Donnelley … Solutions/FA 
 4/26/24  CoStar Group, Inc.                DEF 14A      6/6/24   11:15M                                    Donnelley … Solutions/FA 
 4/24/24‡ CoStar Group, Inc.                10-Q        3/31/24   86:7.1M                                                            
 4/24/24‡ CoStar Group, Inc.                425                    1:121K Matterport, Inc./DE               Donnelley … Solutions/FA 
 4/24/24‡ CoStar Group, Inc.                425         4/23/24    1:21M  Matterport, Inc./DE               Donnelley … Solutions/FA 
 4/23/24  CoStar Group, Inc.                8-K:2,7,9   4/23/24   12:21M                                    Donnelley … Solutions/FA 
 4/22/24  CoStar Group, Inc.                425                    1:573K Matterport, Inc./DE               Donnelley … Solutions/FA 
          Matrix Merger Sub II LLC³
          Matrix Merger Sub, Inc.³
 4/22/24  CoStar Group, Inc.                8-K:1,7,9   4/21/24   12:831K                                   Donnelley … Solutions/FA 
 3/19/24  Desmarais Michael J               4          Officer²    1:4K   CoStar Group, Inc.                CoStar Group, Inc.       
 3/19/24  Simuro Frank                      4          Officer²    1:4K   CoStar Group, Inc.                CoStar Group, Inc.       
 3/19/24  Wheeler Scott T                   4          Officer²    1:6K   CoStar Group, Inc.                CoStar Group, Inc.       
 3/19/24  Ruggles Lisa                      4          Officer²    1:4K   CoStar Group, Inc.                CoStar Group, Inc.       

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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:  /A
	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-Q	Quarterly Report — Form 10-Q.
	144	Notice of a Proposed Sale of Securities by an Insider — Form 144 { The Filer is an Insider² of the Issuer }.
	425	Prospectus or Communication – Merger.
	ARS	Annual Report to Security Holders.
	DEF 14A	Definitive Proxy Statement — Schedule 14A.
	DEFA14A	Definitive Additional Proxy Soliciting Material — Schedule 14A.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.