<SEC-DOCUMENT>0001447362-21-000154-index.html : 20210624
<SEC-HEADER>0001447362-21-000154.hdr.sgml : 20210624
<ACCEPTANCE-DATETIME>20210624160626
ACCESSION NUMBER:		0001447362-21-000154
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210622
FILED AS OF DATE:		20210624
DATE AS OF CHANGE:		20210624

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MAETZOLD DEREK J
		CENTRAL INDEX KEY:			0001239501

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38984
		FILM NUMBER:		211042917

	MAIL ADDRESS:	
		STREET 1:		820 S. FRIENDSWOOD DRIVE
		STREET 2:		SUITE 201
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CASTLE BIOSCIENCES INC
		CENTRAL INDEX KEY:			0001447362
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				770701774
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		505 S FRIENDSWOOD DRIVE
		STREET 2:		SUITE 401
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
		BUSINESS PHONE:		866-788-9007

	MAIL ADDRESS:	
		STREET 1:		505 S FRIENDSWOOD DRIVE
		STREET 2:		SUITE 401
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_162456516664044.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_162456516664044.html

Document 1 - RAW XML: wf-form4_162456516664044.xml

</DOCUMENT>
</SEC-DOCUMENT>