Item 5. Other Information
Item 5. Other Information.
Insider Trading Arrangements
On May 28, 2026 , Tobin Juvenal , our Chief Commercial Officer , adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 85,524 shares of our common stock and up to 100% of the shares of our common stock issued upon the settlement of 63,029 shares of RSUs and PSUs, less the number of shares withheld to cover tax withholding obligations in connection with the vesting and settlement of such RSUs and PSUs. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is estimated to be from September 14, 2026 until the earlier of all transaction under the trading arrangement being completed or March 19, 2027 .
On June 2, 2026 , Derek J. Maetzold , our Chief Executive Officer , adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 202,966 shares of our common stock and up to 100% of the shares of our common stock issued upon the settlement of 180,459 shares of RSUs and PSUs, less the number of shares withheld to cover tax withholding obligations in connection with the vesting and settlement of such RSUs and PSUs. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is estimated to be from September 11, 2026 until the earlier of all transaction under the trading arrangement being completed or March 19, 2027 .
No other directors or officers, as defined in Rule 16a-1(f), adopted and/or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement, as defined in Regulation S-K Item 408, for the three months ended June 30, 2026.
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Item 6. Exhibits.
Exhibit Number Description
3.1 Amended 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 May 23, 2025.
3.2 Amended and Restated Bylaws 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 August 8, 2025.
4.1 Form 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.
10.1*^ Non-Employee Director Compensation Policy, as amended effective May 28, 2026.
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
^ Indicates management contract or compensatory plan
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
CASTLE BIOSCIENCES, INC.
Date: July 30, 2026 By: /s/ Derek J. Maetzold
Derek J. Maetzold
President and Chief Executive Officer
(Principal Executive Officer)
Date: July 30, 2026 By: /s/ Frank Stokes
Frank Stokes
Chief Financial Officer
(Principal Financial and Accounting Officer)
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Text extracted from the filing as submitted to EDGAR. Formatting, tables and exhibits are simplified for reading; the original document is authoritative for anything you rely on.