Form4.ai tracks every SEC insider trade in real time. See every CSTL insider filing with a free account — no card.
See every CSTL insider filing — free account, no card.
Free accountCASTLE BIOSCIENCES INC (CSTL) has 20 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 18 sales totalling $7.1M. Most recent filing: Oct. 30, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Oct 30, 2026 SEC filing | Juvenal Tobin W Chief Commercial Officer | Sold | $239,591 | — |
| Oct 28, 2026 SEC filing | Juvenal Tobin W Chief Commercial Officer | Sold | $108,767 | — |
| Oct 21, 2026 SEC filing | MAETZOLD DEREK J Pres. & Chief Exec. Officer | Sold | $462,567 | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.