<SEC-DOCUMENT>0001628280-26-024168-index.html : 20260408
<SEC-HEADER>0001628280-26-024168.hdr.sgml : 20260408
<ACCEPTANCE-DATETIME>20260408101454
ACCESSION NUMBER:		0001628280-26-024168
CONFORMED SUBMISSION TYPE:	ARS
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251231
FILED AS OF DATE:		20260408
DATE AS OF CHANGE:		20260408
EFFECTIVENESS DATE:		20260408

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CASTLE BIOSCIENCES INC
		CENTRAL INDEX KEY:			0001447362
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				770701774
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		ARS
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38984
		FILM NUMBER:		26846862

	BUSINESS ADDRESS:	
		STREET 1:		1500 W. PARKWOOD AVE.
		STREET 2:		SUITE 400
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
		BUSINESS PHONE:		866-788-9007

	MAIL ADDRESS:	
		STREET 1:		1500 W. PARKWOOD AVE.
		STREET 2:		SUITE 400
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
</SEC-HEADER>
<DOCUMENT>
<TYPE>ARS
<SEQUENCE>1
<FILENAME>castlebiosciencesinc_2025a.pdf
<DESCRIPTION>ARS
<TEXT>
Document 1 - file: castlebiosciencesinc_2025a.pdf

</DOCUMENT>
</SEC-DOCUMENT>