<SEC-DOCUMENT>0001628280-26-023270-index.html : 20260402
<SEC-HEADER>0001628280-26-023270.hdr.sgml : 20260402
<ACCEPTANCE-DATETIME>20260402164958
ACCESSION NUMBER:		0001628280-26-023270
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250325
FILED AS OF DATE:		20260402
DATE AS OF CHANGE:		20260402

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McCarthy Christine M
		CENTRAL INDEX KEY:			0001332169
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24531
		FILM NUMBER:		26834809

	MAIL ADDRESS:	
		STREET 1:		ONE PROCTER & GAMBLE PLAZA
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45202

ISSUER:		

	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

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>wk-form3a_1775162992.xml
<DESCRIPTION>FORM 3/A
<TEXT>
Document 1 - file: wk-form3a_1775162992.html

Document 1 - RAW XML: wk-form3a_1775162992.xml

</DOCUMENT>
</SEC-DOCUMENT>