CSTL Insider Trading Activity and SEC Form 4 Filings
CSTL insider trading summary
Over the past 12 months, insiders at Castle Biosciences Inc (CSTL) reported 173 sales worth $16.0M by 5 insiders and no open-market purchases on SEC Form 4. Net insider selling was $16.0M.
Latest CSTL insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $272K (7,555 @ $36.01) |
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $101K (2,816 @ $36.01) |
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $12K (325 @ $36.81) |
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $86K (2,393 @ $36.01) |
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $14K (382 @ $36.81) |
| Nov 2, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $38K (1,025 @ $36.81) |
| Oct 28, 2026 | Tobin W Juvenal | Chief Commercial Officer | Sell | $196K (5,341 @ $36.62) |
| Oct 28, 2026 | Tobin W Juvenal | Chief Commercial Officer | Sell | $44K (1,237 @ $35.58) |
| Oct 26, 2026 | Tobin W Juvenal | Chief Commercial Officer | Sell | $109K (3,288 @ $33.08) |
| Oct 19, 2026 | Derek J Maetzold | Pres. & Chief Exec. Officer | Sell | $274K (8,580 @ $31.91) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.