<SEC-DOCUMENT>0002100121-26-000288-index.html : 20260429
<SEC-HEADER>0002100121-26-000288.hdr.sgml : 20260429
<ACCEPTANCE-DATETIME>20260429125135
ACCESSION NUMBER:		0002100121-26-000288
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20260429
DATE AS OF CHANGE:		20260429

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COSTAR GROUP, INC.
		CENTRAL INDEX KEY:			0001057352
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				522091509
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-54369
		FILM NUMBER:		26913106

	BUSINESS ADDRESS:	
		STREET 1:		1201 WILSON BLVD.
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22209
		BUSINESS PHONE:		2023466500

	MAIL ADDRESS:	
		STREET 1:		1201 WILSON BLVD.
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22209

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COSTAR GROUP INC
		DATE OF NAME CHANGE:	19990805

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VANGUARD PORTFOLIO MANAGEMENT LLC
		CENTRAL INDEX KEY:			0002100121
		ORGANIZATION NAME:           	
		EIN:				392888838
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231
		LEGAL ENTITY IDENTIFIER:    	529900YN99W7NU4H6B84

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
		BUSINESS PHONE:		610-669-6148

	MAIL ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>