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CASTLE BIOSCIENCES INC (CSTL)

Director MAETZOLD DEREK J 🟡 adjusted position in 7.2K shares (1 derivative) of CASTLE BIOSCIENCES INC (CSTL) at $30.02 Transaction Date: Aug 14, 2026 | Filing ID: 057642

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  • News bot Aug. 18, 2026, 8:52 p.m.

    🔍 MAETZOLD DEREK J (Director)

    Company: CASTLE BIOSCIENCES INC (CSTL)

    Report Date: 2026-08-14

    Transaction Summary:

    • Total transactions: 13
    • Derivative instruments: 1
    • Holdings reported: 4
    • Total shares acquired: 1,100
    • Total shares sold: 8,332
    • Total shares held: 103,976

    Detailed Transactions and Holdings:

    • Acquired 1,100 shares of Common Stock at $2.39 per share (Direct)
      Date: 2026-08-14 | Code: M | equity_swap_involved: 0 | shares_owned_after: 22,579.00 | transaction_form_type: 4 | Footnotes: F1
    • Sold 1,100 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 21,479.00 | transaction_form_type: 4 | Footnotes: F1, F2
    • Sold 2,714 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 20,355.00 | transaction_form_type: 4 | Footnotes: F1, F2, F3
    • Sold 2,306 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 17,301.00 | transaction_form_type: 4 | Footnotes: F1, F2, F4
    • Sold 278 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 11,534.00 | transaction_form_type: 4 | Footnotes: F1, F2, F5
    • Sold 278 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 11,534.00 | transaction_form_type: 4 | Footnotes: F1, F2, F6
    • Sold 278 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 11,534.00 | transaction_form_type: 4 | Footnotes: F1, F2, F7
    • Sold 278 shares of Common Stock at $30.02 per share (Direct)
      Date: 2026-08-14 | Code: S | equity_swap_involved: 0 | shares_owned_after: 11,534.00 | transaction_form_type: 4 | Footnotes: F1, F2, F8
    • Holds 0 shares of Common Stock (Direct)
      Date: 2026-08-14 | Code: H | nature_of_ownership: By DJM Grantor Retained Annuity Trust No. 6 | shares_owned_after: 11,963.00 | Footnotes: F9
    • Holds 0 shares of Common Stock (Direct)
      Date: 2026-08-14 | Code: H | nature_of_ownership: By DJM Grantor Retained Annuity Trust No. 7 | shares_owned_after: 27,862.00 | Footnotes: F10
    • Holds 0 shares of Common Stock (Direct)
      Date: 2026-08-14 | Code: H | nature_of_ownership: By DJM Grantor Retained Annuity Trust No. 8 | shares_owned_after: 40,935.00 | Footnotes: F11
    • Holds 0 shares of Common Stock (Direct)
      Date: 2026-08-14 | Code: H | nature_of_ownership: DJM Grantor Retained Annuity Trust No. 9 | shares_owned_after: 23,216.00 | Footnotes: F12
    • Sold 1,100 shares of Stock option (right to buy) at $2.39 per share (Derivative)
      Date: 2026-08-14 | Code: M | Expires: 2028-05-09 | equity_swap_involved: 0 | shares_owned_after: 37,757.00 | transaction_form_type: 4 | Footnotes: F1, F13

    Footnotes:

    • F1: These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.
    • F2: This transaction was executed in multiple trades at prices ranging from $29.73 to $30.55, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
    • F3: Held by The Maetzold Descendants 2020 Trust of which the Reporting Person's spouse is the trustee and the Reporting Person's spouse and their children are beneficiaries.
    • F4: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.
    • F5: Held by The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk of which the Reporting Person is the trustee and his child is the beneficiary.
    • F6: Held by The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.
    • F7: Held by The Maetzold 2018 Remainder Trust FBO John Derek Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.
    • F8: Held by The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold of which the Reporting Person is the trustee and his child is the beneficiary.
    • F9: Held by DJM Grantor Retained Annuity Trust No. 6 of which the Reporting Person is the trustee and the beneficiaries are The Maetzold 2018 Remainder Trust FBO John Derek Maetzold, The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk, The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold and The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold.
    • F10: Held by DJM Grantor Retained Annuity Trust No. 7 of which the Reporting Person is the trustee and beneficiary.
    • F11: Held by DJM Grantor Retained Annuity Trust No. 8 of which the Reporting Person is the trustee and beneficiary.
    • F12: Held by DJM Grantor Retained Annuity Trust No. 9 of which the Reporting Person is the trustee and beneficiary.
    • F13: The shares subject to the option are fully vested.

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