CSTL · ISSUER CIK 1447362
CASTLE BIOSCIENCES INC
Between Aug 1, 2026 and Oct 29, 2026, 4 CASTLE BIOSCIENCES INC insiders reported $0.00 of open-market purchases and $8.7M of sales on SEC Form 4.
↗4 insiders filed
Original Form 4 filings from Aug 1, 2026 to Oct 29, 2026. 20 of 22 sales were reported under a 10b5-1 plan.
$0.00Insider buying
$8.7MInsider selling
−$8.7MNet open-market
Oct 28, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 28, 202616:08 | Oct 26, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $33.08 | −3,288 | 45,431 | -7% | −$109K | ||
| Oct 21, 202616:18 | Oct 19, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $31.91 | −14,496 | 12,484 | -54% | −$463K | ||
| Oct 14, 202616:06 | Oct 12, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $33.64 | −3,288 | 48,719 | -6% | −$111K | ||
| Oct 7, 202616:10 | Oct 5, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $35.57 | −14,496 | 21,064 | -41% | −$516K | ||
| Oct 7, 202616:10 | Oct 5, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +8,165 | 29,644 | +38% | $20K | ||
| Oct 5, 202616:07 | Oct 1, 2026 | CSTL | Chief Operating Officer | S · Sell10b5-1 | $35.95 | −4,153 | 13,356 | -24% | −$149K | ||
| Oct 5, 202616:07 | Oct 1, 2026 | CSTL | Chief Operating Officer | M · Exercise10b5-1 | $3.38 | +4,153 | 17,509 | +31% | $14K | ||
| Oct 1, 202616:21 | Sep 30, 2026from Sep 29, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $35.29 | −6,577 | 52,007 | -11% | −$232K | ||
| Sep 23, 202616:27 | Sep 21, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $35.33 | −14,496 | 21,479 | -40% | −$512K | ||
| Sep 23, 202616:27 | Sep 21, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +8,580 | 30,059 | +40% | $21K | ||
| Sep 16, 202616:20 | Sep 15, 2026from Sep 14, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $33.73 | −6,600 | 58,584 | -10% | −$223K | ||
| Sep 15, 202616:08 | Sep 11, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $32.02 | −14,518 | 21,479 | -40% | −$465K | ||
| Sep 15, 202616:08 | Sep 11, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +8,584 | 30,063 | +40% | $21K | ||
| Sep 3, 202616:07 | Sep 1, 2026 | CSTL | Chief Operating Officer | S · Sell10b5-1 | $33.39 | −4,152 | 13,356 | -24% | −$139K | ||
| Sep 3, 202616:07 | Sep 1, 2026 | CSTL | Chief Operating Officer | M · Exercise10b5-1 | $3.38 | +4,152 | 17,508 | +31% | $14K | ||
| Sep 2, 202616:07 | Aug 31, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $32.81 | −1,730 | 65,184 | -3% | −$57K | ||
| Sep 1, 202616:12 | Aug 28, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $33.20 | −18,560 | 21,479 | -46% | −$616K | ||
| Sep 1, 202616:12 | Aug 28, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +12,428 | 33,907 | +58% | $30K | ||
| Aug 27, 202616:38 | Aug 25, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $35.04 | −9,050 | 66,914 | -12% | −$317K | ||
| Aug 26, 202616:16 | Aug 25, 2026from Aug 24, 2026 | CSTL | Chief Operating Officer | S · Sell | $34.06 | −24,602 | 72,649 | -25% | −$838K | ||
| Aug 19, 202616:11 | Aug 17, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $29.59 | −1,730 | 75,964 | -2% | −$51K | ||
| Aug 18, 202616:10 | Aug 14, 2026 | CSTL | Chief Financial Officer | S · Sell | $29.77 | −24,908 | 35,177 | -41% | −$742K | ||
| Aug 18, 202616:09 | Aug 14, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $30.02 | −7,232 | 21,479 | -25% | −$217K | ||
| Aug 18, 202616:09 | Aug 14, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +1,100 | 22,579 | +5% | $3K | ||
| Aug 6, 202616:14 | Nov 24, 2025 | CSTL | Chief Commercial Officer | S · Sell10b5-1Late 255d | $38.39 | −1,301 | 77,694 | -2% | −$50K | ||
| Aug 6, 202616:14 | Aug 5, 2026from Aug 4, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $31.07 | −39,016 | 21,479 | -64% | −$1.2M | ||
| Aug 6, 202616:14 | Aug 5, 2026from Aug 4, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +22,902 | 24,025 | +2039% | $55K | ||
| Aug 5, 202616:18 | Aug 3, 2026 | CSTL | Chief Operating Officer | S · Sell10b5-1 | $29.77 | −8,586 | 13,288 | -39% | −$256K | ||
| Aug 4, 202616:36 | Aug 3, 2026from Jul 31, 2026 | CSTL | Chief Commercial Officer | S · Sell10b5-1 | $29.21 | −19,040 | 78,995 | -19% | −$556K | ||
| Aug 4, 202616:35 | Aug 3, 2026from Jul 31, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | S · Sell10b5-1 | $30.28 | −28,646 | 21,479 | -57% | −$867K | ||
| Aug 4, 202616:35 | Aug 3, 2026from Jul 31, 2026 | CSTL | Pres. & Chief Exec. Officer, Director | M · Exercise10b5-1 | $2.39 | +17,144 | 32,143 | +114% | $41K |