CSTL insider filings
CASTLE BIOSCIENCES INC — 50 most recent insider filings (SEC Forms 3/4/5) from EDGAR, normalized by FilingPulse. Latest filing: 2026-10-07. Screen CSTL transaction legs live →
Insider transaction summary — last 90 days
2026-07-10 to 2026-10-08, from the filings listed below: 21 insider filings (Forms 3/4/5). Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 92 legs across 21 filings by 4 insiders — 263,401 shares, $8,347,751 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 26.
- Largest priced transaction: sale of 24,908 shares @ $29.77 ($741,511) by Stokes Frank, filed 2026-08-18.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | 9 | — | 69 legs · 150,972 sh · $4,738,860 | 22 |
| Juvenal Tobin W — Chief Commercial Officer | 7 | — | 12 legs · 46,028 sh · $1,485,933 | — |
| Oelschlager Kristen M — Chief Operating Officer | 4 | — | 10 legs · 41,493 sh · $1,381,447 | 4 |
| Stokes Frank — Chief Financial Officer | 1 | — | 1 leg · 24,908 sh · $741,511 | — |
Recent insider filings — CASTLE BIOSCIENCES INC
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-10-07 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 8,165 @ $2.39 · Sale (S): 8,580 @ $35.57 · Sale (S): 3,198 @ $35.57 · Sale (S): 2,718 @ $35.57 · Option exercise (M): 8,165 (derivative) @ $0 | EDGAR |
| 2026-10-05 | 4 | Oelschlager Kristen M — Chief Operating Officer | Option exercise (M): 4,153 @ $3.38 · Sale (S): 2,807 @ $35.75 · Sale (S): 1,346 @ $36.38 · Option exercise (M): 4,153 (derivative) @ $0 | EDGAR |
| 2026-10-01 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 5,543 @ $35.50 · Sale (S): 1,034 @ $34.20 | EDGAR |
| 2026-09-23 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 8,580 @ $2.39 · Sale (S): 8,580 @ $35.33 · Sale (S): 3,198 @ $35.33 · Sale (S): 2,718 @ $35.33 · Option exercise (M): 8,580 (derivative) @ $0 | EDGAR |
| 2026-09-16 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 3,306 @ $32.32 · Sale (S): 3,294 @ $35.14 | EDGAR |
| 2026-09-15 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 8,584 @ $2.39 · Sale (S): 8,361 @ $32 · Sale (S): 3,124 @ $32 · Sale (S): 2,656 @ $32 · Sale (S): 223 @ $32.78 · Sale (S): 83 @ $32.78 · +2 more | EDGAR |
| 2026-09-03 | 4 | Oelschlager Kristen M — Chief Operating Officer | Option exercise (M): 4,152 @ $3.38 · Sale (S): 3,952 @ $33.36 · Sale (S): 200 @ $34.02 · Option exercise (M): 4,152 (derivative) @ $0 | EDGAR |
| 2026-09-02 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 1,730 @ $32.81 | EDGAR |
| 2026-09-01 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 12,428 @ $2.39 · Sale (S): 11,472 @ $33.14 · Sale (S): 2,505 @ $33.14 · Sale (S): 2,129 @ $33.14 · Sale (S): 257 @ $33.14 · Sale (S): 257 @ $33.14 · +10 more | EDGAR |
| 2026-08-27 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 9,050 @ $35.04 | EDGAR |
| 2026-08-26 | 4 | Oelschlager Kristen M — Chief Operating Officer | Sale (S): 12,218 @ $33.69 · Sale (S): 7,161 @ $34.26 · Sale (S): 5,223 @ $34.64 | EDGAR |
| 2026-08-19 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 1,730 @ $29.59 | EDGAR |
| 2026-08-18 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 1,100 @ $2.39 · Sale (S): 1,100 @ $30.02 · Sale (S): 2,714 @ $30.02 · Sale (S): 2,306 @ $30.02 · Sale (S): 278 @ $30.02 · Sale (S): 278 @ $30.02 · +3 more | EDGAR |
| 2026-08-18 | 4 | Stokes Frank — Chief Financial Officer | Sale (S): 24,908 @ $29.77 | EDGAR |
| 2026-08-06 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 20,356 @ $2.39 · Sale (S): 8,421 @ $30.79 · Sale (S): 3,374 @ $30.79 · Sale (S): 2,866 @ $30.79 · Sale (S): 11,935 @ $31.34 · Sale (S): 4,782 @ $31.34 · +7 more | EDGAR |
| 2026-08-06 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 1,301 @ $38.39 | EDGAR |
| 2026-08-05 | 4 | Oelschlager Kristen M — Chief Operating Officer | Sale (S): 3,000 @ $29.12 · Sale (S): 4,486 @ $30 · Sale (S): 1,100 @ $30.62 | EDGAR |
| 2026-08-04 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 6,480 @ $2.39 · Sale (S): 6,480 @ $30.15 · Sale (S): 1,983 @ $30.15 · Sale (S): 1,690 @ $30.15 · Option exercise (M): 10,664 @ $2.39 · Sale (S): 10,664 @ $30.35 · +4 more | EDGAR |
| 2026-08-04 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 8,149 @ $28.84 · Sale (S): 7,270 @ $29.58 · Sale (S): 1,891 @ $30.26 · Sale (S): 1,730 @ $28.25 | EDGAR |
| 2026-07-29 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 6,214 @ $2.39 · Sale (S): 5,982 @ $24.13 · Sale (S): 1,307 @ $24.13 · Sale (S): 1,110 @ $24.13 · Sale (S): 268 @ $24.13 · Sale (S): 268 @ $24.13 · +10 more | EDGAR |
| 2026-07-16 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 550 @ $2.39 · Sale (S): 550 @ $22.92 · Sale (S): 1,357 @ $22.92 · Sale (S): 1,153 @ $22.92 · Sale (S): 278 @ $22.92 · Sale (S): 278 @ $22.92 · +3 more | EDGAR |
| 2026-07-06 | 4 | Oelschlager Kristen M — Chief Operating Officer | Sale (S): 8,186 @ $24.40 · Sale (S): 400 @ $24.78 | EDGAR |
| 2026-07-06 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 6,214 @ $2.39 · Sale (S): 6,214 @ $24.29 · Sale (S): 1,357 @ $24.29 · Sale (S): 1,153 @ $24.29 · Sale (S): 278 @ $24.29 · Sale (S): 278 @ $24.29 · +3 more | EDGAR |
| 2026-06-18 | 4 | Oelschlager Kristen M — Chief Operating Officer | Sale (S): 8,587 @ $20.71 | EDGAR |
| 2026-06-17 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 550 @ $2.39 · Sale (S): 550 @ $20.66 · Sale (S): 1,357 @ $20.66 · Sale (S): 1,153 @ $20.66 · Sale (S): 278 @ $20.66 · Sale (S): 278 @ $20.66 · +3 more | EDGAR |
| 2026-06-03 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 204 @ $2.39 · Option exercise (M): 6,010 @ $2.39 · Sale (S): 6,214 @ $20.86 · Sale (S): 1,357 @ $20.86 · Sale (S): 1,153 @ $20.86 · Sale (S): 278 @ $20.86 · +5 more | EDGAR |
| 2026-06-01 | 4 | Goldberg Ellen — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Harrison Miles — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Cotton Rodney — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Caple Kim — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Olson Tiffany — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Cole G Bradley — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | BRADBURY DANIEL — Director | Grant/award (A): 11,766 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Harrison Miles — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Goldberg Ellen — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Caple Kim — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Cotton Rodney — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Olson Tiffany — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | Cole G Bradley — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-27 | 4 | BRADBURY DANIEL — Director | Option exercise (M): 13,667 · Option exercise (M): 13,667 (derivative) @ $0 | EDGAR |
| 2026-05-26 | 4 | Juvenal Tobin W — Chief Commercial Officer | Option exercise (M): 11,210 @ $3.38 · Option exercise (M): 11,210 (derivative) @ $0 | EDGAR |
| 2026-05-22 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 130 @ $2.39 · Sale (S): 130 @ $20.00 · Sale (S): 322 @ $20.00 · Sale (S): 273 @ $20.00 · Sale (S): 66 @ $20.00 · Sale (S): 66 @ $20.00 · +12 more | EDGAR |
| 2026-05-11 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 6,214 @ $2.39 · Sale (S): 5,308 @ $22.08 · Sale (S): 1,159 @ $22.08 · Sale (S): 985 @ $22.08 · Sale (S): 237 @ $22.08 · Sale (S): 237 @ $22.08 · +10 more | EDGAR |
| 2026-04-23 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 550 @ $2.39 · Sale (S): 550 @ $25.10 · Sale (S): 1,357 @ $25.10 · Sale (S): 1,153 @ $25.10 · Sale (S): 278 @ $25.10 · Sale (S): 278 @ $25.10 · +3 more | EDGAR |
| 2026-04-08 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 6,214 @ $2.39 · Sale (S): 6,214 @ $25.03 · Sale (S): 1,357 @ $25.03 · Sale (S): 1,153 @ $25.03 · Sale (S): 278 @ $25.03 · Sale (S): 278 @ $25.03 · +3 more | EDGAR |
| 2026-03-30 | 4 | Cotton Rodney — Director | Option exercise (M): 5,329 · Option exercise (M): 5,329 (derivative) @ $0 | EDGAR |
| 2026-03-30 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Option exercise (M): 550 @ $2.39 · Sale (S): 550 @ $25.55 · Sale (S): 1,357 @ $25.55 · Sale (S): 1,153 @ $25.55 · Sale (S): 278 @ $25.55 · Sale (S): 278 @ $25.55 · +3 more | EDGAR |
| 2026-03-19 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Sale (S): 18,650 @ $25.93 · Sale (S): 650 @ $25.39 | EDGAR |
| 2026-03-17 | 4 | MAETZOLD DEREK J — Pres. & Chief Exec. Officer, Director | Sale (S): 13,204 @ $25.45 · Sale (S): 17,449 @ $25.96 · Sale (S): 126 @ $26.68 | EDGAR |
| 2026-03-16 | 4 | Juvenal Tobin W — Chief Commercial Officer | Sale (S): 20,863 @ $25.24 | EDGAR |
Recent 8-K events — CASTLE BIOSCIENCES INC
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-07-30 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-29 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-06 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-26 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-13 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-03 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-08-08 | 8-K | 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year | EDGAR |
| 2025-08-04 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-05-23 | 8-K | 3.03 — Material Modification to Rights of Security Holders 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 5.07 — Submission of Matters to a Vote of Security Holders 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-05-05 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
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