<SEC-DOCUMENT>0001628280-26-039189-index.html : 20260529 <SEC-HEADER>0001628280-26-039189.hdr.sgml : 20260529 <ACCEPTANCE-DATETIME>20260529161442 ACCESSION NUMBER: 0001628280-26-039189 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 11 CONFORMED PERIOD OF REPORT: 20260528 ITEM INFORMATION: Submission of Matters to a Vote of Security Holders FILED AS OF DATE: 20260529 DATE AS OF CHANGE: 20260529 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: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-38984 FILM NUMBER: 261044586 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>8-K <SEQUENCE>1 <FILENAME>cstl-20260528.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: cstl-20260528.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>2 <FILENAME>cstl-20260528.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT <TEXT> Document 2 - file: cstl-20260528.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>3 <FILENAME>cstl-20260528_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT <TEXT> Document 3 - file: cstl-20260528_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>4 <FILENAME>cstl-20260528_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT <TEXT> Document 4 - file: cstl-20260528_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>6 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 6 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>7 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 7 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>8 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 8 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>10 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 10 - file: FilingSummary.html
Document 10 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>12 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 12 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>13 <FILENAME>0001628280-26-039189-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 13 - file: 0001628280-26-039189-xbrl.zip
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>14 <FILENAME>cstl-20260528_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 14 - file: cstl-20260528_htm.html
Document 14 - RAW XML: cstl-20260528_htm.xml
</DOCUMENT> </SEC-DOCUMENT>