Derek J. Maetzold
Pres. & Chief Exec. Officer at Castle Biosciences Inc.
Sits on 1 board. Last updated September 27, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Castle Biosciences Inc., 3 years.
Castle Biosciences Inc.
Director · Pres. & Chief Exec. Officer
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 21, 2026 | Castle Biosciences Inc. | Option exercise | +8,580 | $2.39 | $20,506 |
| Sep 21, 2026 | Castle Biosciences Inc. | Open-market sale | −8,580 | $35.33 | $303,166 |
| Sep 21, 2026 | Castle Biosciences Inc. | Open-market sale | −3,198 | $35.33 | $112,998 |
| Sep 21, 2026 | Castle Biosciences Inc. | Open-market sale | −2,718 | $35.33 | $96,038 |
| Sep 11, 2026 | Castle Biosciences Inc. | Option exercise | +8,584 | $2.39 | $20,516 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −8,361 | $32.00 | $267,552 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −3,124 | $32.00 | $99,968 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −2,656 | $32.00 | $84,992 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −223 | $32.78 | $7,310 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −83 | $32.78 | $2,721 |
| Sep 11, 2026 | Castle Biosciences Inc. | Open-market sale | −71 | $32.78 | $2,327 |
| Aug 28, 2026 | Castle Biosciences Inc. | Option exercise | +12,428 | $2.39 | $29,703 |
| Aug 28, 2026 | Castle Biosciences Inc. | Open-market sale | −11,472 | $33.14 | $380,182 |
| Aug 28, 2026 | Castle Biosciences Inc. | Open-market sale | −2,505 | $33.14 | $83,016 |
| Aug 28, 2026 | Castle Biosciences Inc. | Open-market sale | −2,129 | $33.14 | $70,555 |
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