Key facts
- This page summarizes Derek J. Maetzold's Form 4 filing for CASTLE BIOSCIENCES INC (CSTL).
- 2 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 14 Jan 2026, 16:30.
Derek J. Maetzold - 12 Jan 2026 Form 4 Insider Report for CASTLE BIOSCIENCES INC (CSTL)
- Reporting relationship
- Pres. & Chief Exec. Officer, Director
- Issuer ticker
- CSTL
- Reported as of
- 12 Jan 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 14 Jan 2026, 16:30:11 UTC
- Prior SEC filing
- 07 Jan 2026
- Next SEC filing
- 22 Jan 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Frank Stokes, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Derek J. Maetzold filed Form 4 for CASTLE BIOSCIENCES INC (CSTL) on 14 Jan 2026.
Change
- Previous filing in this sequence was filed on 07 Jan 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001239501
Primary reporting owner
MAETZOLD DEREK J
- Relationship
- Pres. & Chief Exec. Officer, Director
- Address
- C/O CASTLE BIOSCIENCES, INC., 505 S. FRIENDSWOOD DRIVE, SUITE 401, FRIENDSWOOD
- Signature
- /s/ Frank Stokes, Attorney-in-Fact
- Signature date
- 14 Jan 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
CSTL
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +62,219
- Change %
- +211%
- Price
- $0.000000
- Shares after
- 91,732
- Date
- 12 Jan 2026
- Ownership
- Direct
- Footnotes
- F1
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 52,923
- Date
- 12 Jan 2026
- Ownership
- By The Maetzold Descendants 2020 Trust
- Footnotes
- F2
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 44,986
- Date
- 12 Jan 2026
- Ownership
- By Derek Maetzold 2020 Irrevocable Trust
- Footnotes
- F3
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,618
- Date
- 12 Jan 2026
- Ownership
- By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk
- Footnotes
- F4
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,615
- Date
- 12 Jan 2026
- Ownership
- By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold
- Footnotes
- F5
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,615
- Date
- 12 Jan 2026
- Ownership
- By The Maetzold 2018 Remainder Trust FBO John Derek Maetzold
- Footnotes
- F6
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,615
- Date
- 12 Jan 2026
- Ownership
- By The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold
- Footnotes
- F7
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 85,959
- Date
- 12 Jan 2026
- Ownership
- By DJM Grantor Retained Annuity Trust No. 5
- Footnotes
- F8
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 18,718
- Date
- 12 Jan 2026
- Ownership
- By DJM Grantor Retained Annuity Trust No. 6
- Footnotes
- F9
CSTL
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 44,323
- Date
- 12 Jan 2026
- Ownership
- By DJM Grantor Retained Annuity Trust No. 7
- Footnotes
- F10
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
CSTL
transaction
Derivative
Performance-Based Stock Unit
Award
- Transaction value
- $0
- Shares
- +62,219
- Change %
- Price
- $0.000000
- Shares after
- 62,219
- Date
- 12 Jan 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 62,219
- Exercise price
- Footnotes
- F11
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 11 footnotes
Footnote F1
Represents 50% of the Performance-Based Stock Units ("PSUs") granted on March 4, 2024 ("2024 PSUs") that vested based on the satisfaction of certain performance criteria as certified by the board of directors of the Issuer on January 12, 2026.
Footnote F2
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.
Footnote F3
Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.
Footnote F4
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.
Footnote F5
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.
Footnote F6
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.
Footnote F7
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.
Footnote F8
Held by DJM Grantor Retained Annuity Trust No. 5 of which the Reporting Person is the trustee and beneficiary.
Footnote 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.
Footnote F10
Held by DJM Grantor Retained Annuity Trust No. 7 of which the Reporting Person is the trustee and beneficiary.
Footnote F11
Each PSU represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the 2024 PSUs which will vest subject to the achievement of certain milestones.