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
- Insiders sold $10M over the last 12 months (38 sales). No open-market buys.
- Last insider buy: Ellen Goldberg (Director), $43.2K, 3 years ago.
Last 12 months: insiders bought $0 (0 buys) and sold $10M (38 sales). Last close $21.01 on Jun 4, 2026.
Recent CSTL insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Jun 16, 2026 | Kristen M Oelschlager (COO) | Sold | $178K |
| Jun 15, 2026 | Derek J Maetzold (Officer) | Sold | $28K |
| Jun 15, 2026 | Derek J Maetzold (Officer) | Sold | $23.8K |
| Jun 15, 2026 | Derek J Maetzold (Officer) | Sold | $11.4K |
| Jun 15, 2026 | Derek J Maetzold (Officer) | Sold | $5.7K |
| Jun 15, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | — |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Sold | $130K |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Sold | $28.3K |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Sold | $24K |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Sold | $5.8K |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | — |
| Jun 1, 2026 | Derek J Maetzold (Officer) | Bought (not open market) | — |
| May 28, 2026 | Tiffany Olson (Director) | Bought (not open market) | — |
| May 28, 2026 | Daniel Bradbury (Director) | Bought (not open market) | — |
| May 28, 2026 | Kim Caple (Director) | Bought (not open market) | — |
| May 28, 2026 | Ellen Goldberg (Director) | Bought (not open market) | — |
| May 28, 2026 | G Bradley Cole (Director) | Bought (not open market) | — |
| May 28, 2026 | Miles Harrison (Director) | Bought (not open market) | — |
| May 28, 2026 | Rodney Cotton (Director) | Bought (not open market) | — |
| May 22, 2026 | Miles Harrison (Director) | Bought (not open market) | — |
| May 22, 2026 | G Bradley Cole (Director) | Bought (not open market) | — |
| May 22, 2026 | Ellen Goldberg (Director) | Bought (not open market) | — |
| May 22, 2026 | Daniel Bradbury (Director) | Bought (not open market) | — |
| May 22, 2026 | Tiffany Olson (Director) | Bought (not open market) | — |
| May 22, 2026 | Rodney Cotton (Director) | Bought (not open market) | — |
Who's trading CSTL
- Kristen M Oelschlager, COO: sold $1.7M (4 sales), last Jun 16, 2026
- Derek J Maetzold, Officer: sold $6.1M (68 sales), last Jun 15, 2026
- Kim Caple, Director: other filings, last May 28, 2026
- G Bradley Cole, Director: sold $211K (2 sales), last May 28, 2026
- Rodney Cotton, 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
- Ellen Goldberg, Director: other filings, last May 28, 2026
- Daniel Bradbury, Director: other filings, last May 28, 2026
- Tobin W Juvenal, C-suite exec: sold $1.2M (7 sales), last May 21, 2026
- Frank Stokes, CFO: sold $717K (5 sales), last Mar 5, 2026
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