11 insiders reported 329 Form 4 transactions for CASTLE BIOSCIENCES INC (CSTL) over the past 18 months (most recent 2026-08-19). Recent activity: Juvenal Tobin W (Chief Commercial Officer) Sell 1,730 shares, MAETZOLD DEREK J (Pres. & Chief Exec. Officer) Buy 1,100 shares, Stokes Frank (Chief Financial Officer) Sell 24,908 shares, MAETZOLD DEREK J (Pres. & Chief Exec. Officer) Sell 2,714 shares, MAETZOLD DEREK J (Pres. & Chief Exec. Officer) Sell 2,306 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-19 | Juvenal Tobin W | Chief Commercial Officer | Sell | 1,730 | $51,191 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Buy | 1,100 | $2,629 |
| 2026-08-18 | Stokes Frank | Chief Financial Officer | Sell | 24,908 | $741,511 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2,714 | $81,474 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2,306 | $69,226 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 1,100 | $33,022 |
| 2026-08-06 | Juvenal Tobin W | Chief Commercial Officer | Sell | 1,301 | $49,945 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Buy | 20,356 | $48,651 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 3,374 | $103,879 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2,866 | $88,238 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 11,935 | $373,995 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 4,782 | $149,849 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 4,063 | $127,318 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Buy | 2,546 | $6,085 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 2,546 | $78,114 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 556 | $17,059 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 473 | $14,512 |
| 2026-08-06 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | 8,421 | $259,266 |
| 2026-08-05 | Oelschlager Kristen M | Chief Operating Officer | Sell | 1,100 | $33,682 |
| 2026-08-05 | Oelschlager Kristen M | Chief Operating Officer | Sell | 3,000 | $87,360 |
| 2026-08-05 | Oelschlager Kristen M | Chief Operating Officer | Sell | 4,486 | $134,580 |
Source: SEC Form 4 filings · as of 2026-08-19