<SEC-DOCUMENT>0001057352-19-000105-index.html : 20191220
<SEC-HEADER>0001057352-19-000105.hdr.sgml : 20191220
<ACCEPTANCE-DATETIME>20191220174710
ACCESSION NUMBER:		0001057352-19-000105
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20191212
FILED AS OF DATE:		20191220
DATE AS OF CHANGE:		20191220

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Sams Louise S
		CENTRAL INDEX KEY:			0001796961

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24531
		FILM NUMBER:		191302919

	MAIL ADDRESS:	
		STREET 1:		C/O COSTAR GROUP, INC.
		STREET 2:		1331 L STREET NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20005

ISSUER:		

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

	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>3
<SEQUENCE>1
<FILENAME>wf-form3_157688201315121.xml
<DESCRIPTION>FORM 3
<TEXT>
Document 1 - file: wf-form3_157688201315121.html

Document 1 - RAW XML: wf-form3_157688201315121.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>limitedpoa-sams.htm
<DESCRIPTION>SAMS - LIMITED POA
<TEXT>
Document 2 - file: limitedpoa-sams.htm

</DOCUMENT>
</SEC-DOCUMENT>