Castle Biosciences (CSTL) CEO moves shares, vested PSUs converted to stock
Rhea-AI Filing Summary
Derek Maetzold, President & CEO and a director of Castle Biosciences (CSTL), reported the conversion of 66,991 performance-based stock units into common shares and a sale of 23,972 shares at $19.36 on 08/08/2025. After the reported sale his direct beneficial ownership is shown as 112,702 shares. The filing documents trust movements on July 11, 2025 (transfers into his direct holdings) and July 14, 2025 (transfer of 44,323 shares from his direct holdings to a grantor retained annuity trust). The PSUs converted represent the remaining 50% of a December 23, 2022 grant that vested in full on the one-year anniversary of August 9, 2024.
Positive
- 66,991 PSUs converted into common shares, increasing the reporting person\'s actual shareholdings
- Detailed trust disclosures identify trustee roles and beneficiaries, providing clarity on indirect ownership
Negative
- 23,972 shares sold at $19.36, reducing direct holdings to 112,702 shares
- 44,323 shares transferred from direct holdings to DJM Grantor Retained Annuity Trust No.7, decreasing direct ownership
Insights
TL;DR: Insider vested PSUs and sold a portion of shares; transactions appear routine and do not, by themselves, signal a material change to ownership control.
The conversion of 66,991 PSUs into common stock increases the executive's share count while a concurrent disposition of 23,972 shares at $19.36 reduced direct holdings to 112,702 shares. The filing also records intra-family and grantor trust transfers totaling tens of thousands of shares, consistent with estate planning and compensation vesting mechanics. No single item in the report explicitly indicates a change in governance or control.
TL;DR: Transactions reflect routine vesting and estate/trust reorganization; disclosures identify trustee roles and beneficiaries for transparency.
The filing specifies that several trusts hold portions of the reporting person's position and names the reporting person or spouse as trustee in multiple cases, improving clarity on indirect ownership. Notably, 44,323 shares were moved from direct holdings to DJM Grantor Retained Annuity Trust No.7 and other trust transfers occurred on July 11 and July 14, 2025. These are internal ownership allocations rather than market-altering events.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Performance-Based Stock Unit | 66,991 | $0.00 | -- |
| Exercise | Common Stock | 66,991 | $0.00 | -- |
| Tax Withholding | Common Stock | 23,972 | $19.36 | $464K |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
Footnotes (1)
- Reflects the transfers on July 11, 2025, of 36,907 shares of common stock from DJM Grantor Annuity Trust No. 5 and 7,416 shares of common stock from DJM Grantor Annuity Trust No. 6 to the Reporting Person's direct holdings, and the transfer on July 14, 2025, of 44,323 shares of common stock from the Reporting Person's direct holdings to DJM Grantor Annuity Trust No. 7. 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. Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries. 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. 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. 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. 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. Held by DJM Grantor Retained Annuity Trust No. 5 of which the Reporting Person is the trustee and beneficiary. 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. Held by DJM Grantor Retained Annuity Trust No. 7 of which the Reporting Person is the trustee and beneficiary. Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024.
