Company · CIK 0001447362 · SIC 8071 — Services-Medical Laboratories · Nasdaq
CASTLE BIOSCIENCES INC · CSTL
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026 SForm 4 → | Sep 23, 4:27 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 14,496 | $35.33 | $512,202 | 9,550 | −60.3% | 10b5-1 |
| Sep 21, 2026 MForm 4 → | Sep 23, 4:27 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 8,580 | $2.39 | $20,506 | 30,059 | — | 10b5-1 |
| Sep 14, 2026 SForm 4 → | Sep 16, 4:20 pm EDT | Tobin W JuvenalChief Commercial Officer | 6,600 | $33.73 | $222,621 | 58,584 | −10.1% | 10b5-1 |
| Sep 11, 2026 SForm 4 → | Sep 15, 4:08 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 14,518 | $32.02 | $464,870 | 12,268 | −54.2% | 10b5-1 |
| Sep 11, 2026 MForm 4 → | Sep 15, 4:08 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 8,584 | $2.39 | $20,516 | 30,063 | — | 10b5-1 |
| Sep 1, 2026 SForm 4 → | Sep 3, 4:07 pm EDT | Kristen M OelschlagerChief Operating Officer | 4,152 | $33.39 | $138,643 | 13,356 | −23.7% | 10b5-1 |
| Sep 1, 2026 MForm 4 → | Sep 3, 4:07 pm EDT | Kristen M OelschlagerChief Operating Officer | 4,152 | $3.38 | $14,034 | 17,508 | — | 10b5-1 |
| Aug 31, 2026 SForm 4 → | Sep 2, 4:07 pm EDT | Tobin W JuvenalChief Commercial Officer | 1,730 | $32.81 | $56,761 | 65,184 | −2.59% | 10b5-1 |
| Aug 28, 2026 SForm 4 → | Sep 1, 4:12 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 18,560 | $33.20 | $616,134 | 11,256 | −62.2% | 10b5-1 |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:12 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 12,428 | $2.39 | $29,703 | 33,907 | — | 10b5-1 |
| Aug 25, 2026 SForm 4 → | Aug 27, 4:38 pm EDT | Tobin W JuvenalChief Commercial Officer | 9,050 | $35.04 | $317,112 | 66,914 | −11.9% | 10b5-1 |
| Aug 24, 2026 SForm 4 → | Aug 26, 4:16 pm EDT | Kristen M OelschlagerChief Operating Officer | 24,602 | $34.06 | $837,865 | 72,649 | −25.3% | |
| Aug 17, 2026 SForm 4 → | Aug 19, 4:11 pm EDT | Tobin W JuvenalChief Commercial Officer | 1,730 | $29.59 | $51,191 | 75,964 | −2.23% | 10b5-1 |
| Aug 14, 2026 SForm 4 → | Aug 18, 4:10 pm EDT | Frank StokesChief Financial Officer | 24,908 | $29.77 | $741,511 | 35,177 | −41.5% | |
| Aug 14, 2026 SForm 4 → | Aug 18, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 7,232 | $30.02 | $217,105 | 11,534 | −38.5% | 10b5-1 |
| Aug 14, 2026 MForm 4 → | Aug 18, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 1,100 | $2.39 | $2,629 | 22,579 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:14 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 39,016 | $31.07 | $1,212,230 | 19,607 | −66.6% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:14 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 22,902 | $2.39 | $54,736 | 24,025 | — | 10b5-1 |
| Aug 3, 2026 SForm 4 → | Aug 5, 4:18 pm EDT | Kristen M OelschlagerChief Operating Officer | 8,586 | $29.77 | $255,622 | 13,288 | −39.3% | 10b5-1 |
| Jul 31, 2026 SForm 4 → | Aug 4, 4:36 pm EDT | Tobin W JuvenalChief Commercial Officer | 19,040 | $29.21 | $556,175 | 78,995 | −19.4% | 10b5-1 |
| Jul 31, 2026 SForm 4 → | Aug 4, 4:35 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 28,646 | $30.28 | $867,451 | 27,009 | −51.5% | 10b5-1 |
| Jul 31, 2026 MForm 4 → | Aug 4, 4:35 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 17,144 | $2.39 | $40,974 | 32,143 | — | 10b5-1 |
| Jul 27, 2026 SForm 4 → | Jul 29, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 9,836 | $24.16 | $237,682 | 11,812 | −45.4% | 10b5-1 |
| Jul 27, 2026 MForm 4 → | Jul 29, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | $2.39 | $14,851 | 27,693 | — | 10b5-1 |
| Jul 14, 2026 SForm 4 → | Jul 16, 4:16 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 4,172 | $22.92 | $95,622 | 12,090 | −25.7% | 10b5-1 |
| Jul 14, 2026 MForm 4 → | Jul 16, 4:16 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 550 | $2.39 | $1,315 | 22,029 | — | 10b5-1 |
| Jul 1, 2026 SForm 4 → | Jul 6, 4:25 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 9,836 | $24.29 | $238,916 | 12,368 | −44.3% | 10b5-1 |
| Jul 1, 2026 MForm 4 → | Jul 6, 4:25 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | $2.39 | $14,851 | 27,693 | — | 10b5-1 |
| Jul 1, 2026 SForm 4 → | Jul 6, 4:24 pm EDT | Kristen M OelschlagerChief Operating Officer | 8,586 | $24.42 | $209,650 | 21,874 | −28.2% | 10b5-1 |
| Jun 16, 2026 SForm 4 → | Jun 18, 4:19 pm EDT | Kristen M OelschlagerChief Operating Officer | 8,587 | $20.71 | $177,837 | 30,460 | −22.0% | 10b5-1 |
| Jun 15, 2026 SForm 4 → | Jun 17, 5:39 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 4,172 | $20.66 | $86,194 | 12,646 | −24.8% | 10b5-1 |
| Jun 15, 2026 MForm 4 → | Jun 17, 5:39 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 550 | $2.39 | $1,315 | 22,029 | — | 10b5-1 |
| Jun 1, 2026 SForm 4 → | Jun 3, 4:15 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 9,836 | $20.86 | $205,149 | 1,668 | −85.5% | 10b5-1 |
| Jun 1, 2026 MForm 4 → | Jun 3, 4:15 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | $2.39 | $14,851 | 27,693 | — | 10b5-1 |
| Nov 24, 2025 SForm 4 → | Aug 6, 2026, 4:14 pm EDT | Tobin W JuvenalChief Commercial Officer | 1,301 | $38.39 | $49,945 | 77,694 | −1.65% | 10b5-1 late |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026 MForm 4 → | Sep 23, 4:27 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 8,580 | — | — | 8,165 | — | 10b5-1 |
| Sep 11, 2026 MForm 4 → | Sep 15, 4:08 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 8,584 | — | — | 16,745 | — | 10b5-1 |
| Sep 1, 2026 MForm 4 → | Sep 3, 4:07 pm EDT | Kristen M OelschlagerChief Operating Officer | 4,152 | — | — | 12,458 | — | 10b5-1 |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:12 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 12,428 | — | — | 25,329 | — | 10b5-1 |
| Aug 14, 2026 MForm 4 → | Aug 18, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 1,100 | — | — | 37,757 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:14 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 22,902 | — | — | 38,857 | — | 10b5-1 |
| Jul 31, 2026 MForm 4 → | Aug 4, 4:35 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 17,144 | — | — | 61,759 | — | 10b5-1 |
| Jul 27, 2026 MForm 4 → | Jul 29, 4:09 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | — | — | 78,903 | — | 10b5-1 |
| Jul 14, 2026 MForm 4 → | Jul 16, 4:16 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 550 | — | — | 85,117 | — | 10b5-1 |
| Jul 1, 2026 MForm 4 → | Jul 6, 4:25 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | — | — | 85,667 | — | 10b5-1 |
| Jun 15, 2026 MForm 4 → | Jun 17, 5:39 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 550 | — | — | 91,881 | — | 10b5-1 |
| Jun 1, 2026 MForm 4 → | Jun 3, 4:15 pm EDT | Derek J MaetzoldPres. & Chief Exec. Officer, Director | 6,214 | — | — | 92,431 | — | 10b5-1 |