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CASTLE BIOSCIENCES INC

For the period ended Mar 31, 2025. Filed May 5, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2025 · Filed May 5, 2025

CSTL$34.38+5.7%Stored close · as of Nov 9, 2026

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Item 6. Exhibits

Exhibit NumberDescription of document
2.1#+Agreement and Plan of Merger, dated October 18, 2021, by and among the Registrant, Space Merger Sub, Inc., Cernostics, Inc., and Shareholder Representative Services LLC, incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K, as amended, originally filed with the SEC on December 6, 2021.
2.2#+Agreement and Plan of Merger, dated April 4, 2022, by and among the Registrant, AltheaDx, Inc., Acorn Merger Sub, Inc. and Fortis Advisors LLC, incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K filed with the SEC on April 4, 2022.
3.1Amended and Restated Certificate of Incorporation of the Registrant, incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K filed with the SEC on July 29, 2019.
3.2Amended and Restated Bylaws of the Registrant, incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K filed with the SEC on July 29, 2019.
4.1Form of Common Stock Certificate of the Registrant, incorporated by reference to Exhibit 4.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-232369), as amended, originally filed with the SEC on June 26, 2019.
4.2Sixth Amended and Restated Investors’ Rights Agreement, dated July 12, 2019, by and among the Registrant and certain of its stockholders, incorporated by reference to Exhibit 4.2 of the Registrant’s Registration Statement on Form S-1 (File No. 333-232369), as amended, originally filed with the SEC on June 26, 2019.
10.1*#+Consent and First Amendment to the Loan and Security Agreement, dated April 4, 2025, by and among the Registrant, Castle Narnia Way Real Estate Holding 1, LLC and Silicon Valley Bank.
10.2*Third Amendment to Commercial Lease, executed April 14, 2025, by and between the Registrant and Tannos Land Holdings III, LLC.
31.1*Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) of the Exchange Act.
31.2*Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) of the Exchange Act.
32.1**Certification of Principal Executive Officer and Principal Financial Officer pursuant to Rules 13a-14(b) or 15d-14(b) of the Exchange Act, and 18 U.S.C. Section 1350.
101.INS*Inline XBRL Instance Document—the instance document does not appear in the Interactive Data File as its XBRL tags are embedded within the Inline XBRL document.
101.SCH*Inline XBRL Taxonomy Extension Schema.
101.CAL*Inline XBRL Taxonomy Extension Calculation Linkbase.
101.DEF*Inline XBRL Taxonomy Extension Definition Linkbase.
101.LAB*Inline XBRL Taxonomy Extension Label Linkbase.
101.PRE*Inline XBRL Taxonomy Extension Presentation Linkbase.
104*Cover Page Interactive Data File (embedded within the Inline XBRL and contained in Exhibit 101).
  • Filed herewith

** Furnished herewith

Certain schedules or exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished to the SEC upon request; provided, however, that we may request confidential treatment pursuant to Rule 24b-2 of the Exchange Act for any schedule or exhibit so furnished.

  • Pursuant to Item 601(b)(10) of Regulation S-K, certain portions of this exhibit have been omitted (indicated by “[***]”) because the Company has determined that the information is not material and is the type that the Company treats as private or confidential.
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