Castle Biosciences Inc (CSTL) insider trading
Every open-market stock purchase and sale by Castle Biosciences Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Derek J Maetzold (Officer) and 3 others sold $8.8M in the last 90 days.
- Last insider buy: Ellen Goldberg (Director), $43.2K, 3 years ago.
Last 12 months: insiders bought $0 (0 buys) and sold $19.2M (61 sales). Last close $33.19 on Oct 22, 2026.
Recent CSTL insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 19, 2026 | Derek J Maetzold (Officer) | Sold | $274K |
| Oct 19, 2026 | Derek J Maetzold (Officer) | Sold | $102K |
| Oct 19, 2026 | Derek J Maetzold (Officer) | Sold | $86.7K |
| Oct 12, 2026 | Tobin W Juvenal (C-suite exec) | Sold | $111K |
| Oct 5, 2026 | Derek J Maetzold (Officer) | Sold | $305K |
| Oct 5, 2026 | Derek J Maetzold (Officer) | Sold | $114K |
| Oct 5, 2026 | Derek J Maetzold (Officer) | Sold | $96.7K |
| Oct 5, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | $19.5K |
| Oct 5, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | — |
| Oct 1, 2026 | Kristen M Oelschlager (COO) | Sold | $100K |
| Oct 1, 2026 | Kristen M Oelschlager (COO) | Sold | $49K |
| Oct 1, 2026 | Kristen M Oelschlager (COO) | Bought (not open market) | $14K |
| Oct 1, 2026 | Kristen M Oelschlager (COO) | Bought (not open market) | — |
| Sep 30, 2026 | Tobin W Juvenal (C-suite exec) | Sold | $35.4K |
| Sep 29, 2026 | Tobin W Juvenal (C-suite exec) | Sold | $197K |
| Sep 21, 2026 | Derek J Maetzold (Officer) | Sold | $303K |
| Sep 21, 2026 | Derek J Maetzold (Officer) | Sold | $113K |
| Sep 21, 2026 | Derek J Maetzold (Officer) | Sold | $96K |
| Sep 21, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | $20.5K |
| Sep 21, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | — |
| Sep 15, 2026 | Tobin W Juvenal (C-suite exec) | Sold | $116K |
| Sep 14, 2026 | Tobin W Juvenal (C-suite exec) | Sold | $107K |
| Sep 11, 2026 | Derek J Maetzold (Officer) | Sold | $268K |
| Sep 11, 2026 | Derek J Maetzold (Officer) | Sold | $100K |
| Sep 11, 2026 | Derek J Maetzold (Officer) | Sold | $85K |
Who's trading CSTL
- Derek J Maetzold, Officer: sold $11.4M (124 sales), last Oct 19, 2026
- Tobin W Juvenal, C-suite exec: sold $2.8M (20 sales), last Oct 12, 2026
- Kristen M Oelschlager, COO: sold $3.3M (16 sales), last Oct 1, 2026
- Frank Stokes, CFO: sold $1.5M (6 sales), last Aug 14, 2026
- Rodney Cotton, Director: other filings, last May 28, 2026
- Ellen Goldberg, Director: other filings, last May 28, 2026
- Tiffany Olson, Director: other filings, last May 28, 2026
- Miles Harrison, Director: other filings, last May 28, 2026
- Daniel Bradbury, Director: other filings, last May 28, 2026
- Kim Caple, Director: other filings, last May 28, 2026
- G Bradley Cole, Director: sold $211K (2 sales), last May 28, 2026
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