<SEC-DOCUMENT>0001193125-24-117793-index.html : 20240426
<SEC-HEADER>0001193125-24-117793.hdr.sgml : 20240426
<ACCEPTANCE-DATETIME>20240426153057
ACCESSION NUMBER:		0001193125-24-117793
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20240426
DATE AS OF CHANGE:		20240426

FILER:

	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
		IRS NUMBER:				522091509
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24531
		FILM NUMBER:		24883016

	BUSINESS ADDRESS:	
		STREET 1:		1331 L STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20005
		BUSINESS PHONE:		2023466500

	MAIL ADDRESS:	
		STREET 1:		1331 L STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20005

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COSTAR GROUP INC
		DATE OF NAME CHANGE:	19990805
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d806524ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d806524ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g806524g01p01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g806524g01p01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g806524g02p02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g806524g02p02.jpg

</DOCUMENT>
</SEC-DOCUMENT>