CASTLE BIOSCIENCES INC — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 830 | $40.35 | $33,491 | 33,530 | Dec 22, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 509 | $40.04 | $20,380 | 34,360 | Dec 17, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 14,888 | $39.31 | $585,247 | 12,323 | Dec 17, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 12,821 | $38.55 | $494,250 | 34,869 | Dec 15, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Sale | 13,200 | $37.48 | $494,736 | 86,825 | Dec 11, 2025 |
| Stokes Frank | Chief Financial Officer | Sale | 4,496 | $37.45 | $168,375 | 50,326 | Dec 11, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Option Exercise | 15,961 | — | — | 28,284 | Dec 10, 2025 |
| Stokes Frank | Chief Financial Officer | Option Exercise | 14,616 | — | — | 57,944 | Dec 10, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Tax Withholding | 13,181 | $38.25 | $504,173 | 57,861 | Dec 9, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Tax Withholding | 2,490 | $38.02 | $94,670 | 100,025 | Dec 9, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $40.03 | $53,600 | 37,547 | Dec 4, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 2,678 | $39.23 | $105,058 | 38,886 | Dec 2, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 4,258 | $40.09 | $170,703 | 41,564 | Nov 26, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 5,115 | $40.05 | $204,856 | 45,822 | Nov 25, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Sale | 4,693 | $35.58 | $166,977 | 84,595 | Nov 20, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 2,678 | $34.02 | $91,106 | 50,937 | Nov 18, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Sale | 200 | $35.40 | $7,080 | 84,527 | Nov 12, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Sale | 500 | $35.39 | $17,695 | 84,027 | Nov 12, 2025 |
| Stokes Frank | Chief Financial Officer | Sale | 5,388 | $35.08 | $189,011 | 43,328 | Nov 11, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 18,932 | $35.10 | $664,513 | 12,323 | Nov 11, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 6,458 | $30.41 | $196,388 | 56,530 | Nov 5, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 12,678 | $25.04 | $317,457 | 27,569 | Oct 31, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $22.44 | $30,047 | 62,988 | Oct 20, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $22.58 | $30,235 | 64,327 | Oct 2, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $21.97 | $29,418 | 65,666 | Sep 17, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $23.93 | $32,042 | 67,005 | Sep 2, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 12,677 | $22.02 | $279,148 | 141,116 | Aug 27, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 18,007 | $21.69 | $390,572 | 153,793 | Aug 27, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Sale | 18,007 | $21.69 | $390,572 | 100,937 | Aug 27, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,339 | $20.04 | $26,834 | 68,344 | Aug 15, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 43,019 | $19.50 | $838,871 | 69,683 | Aug 13, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Tax Withholding | 23,972 | $19.36 | $464,098 | 112,702 | Aug 8, 2025 |
| Stokes Frank | Chief Financial Officer | Tax Withholding | 4,356 | $19.36 | $84,332 | 48,716 | Aug 8, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Tax Withholding | 2,804 | $19.36 | $54,285 | 171,800 | Aug 8, 2025 |
| Juvenal Tobin W | Chief Commercial Officer | Option Exercise | 10,640 | — | — | 88,821 | Aug 8, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 8,068 | $20.30 | $163,780 | 52,923 | Jun 27, 2025 |
| Cole G Bradley | — | Option Exercise | 8,673 | — | — | 21,964 | May 21, 2025 |
| BRADBURY DANIEL | — | Option Exercise | 8,673 | — | — | 8,673 | May 21, 2025 |
| Cotton Rodney | — | Option Exercise | 8,673 | — | — | 14,002 | May 21, 2025 |
| Caple Kim | — | Option Exercise | 8,673 | — | — | 22,454 | May 21, 2025 |
| Goldberg Ellen | — | Option Exercise | 8,673 | — | — | 27,254 | May 21, 2025 |
| Olson Tiffany | — | Option Exercise | 8,673 | — | — | 25,906 | May 21, 2025 |
| Harrison Miles | — | Option Exercise | 8,673 | — | — | 21,964 | May 21, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 165 | $21.52 | $3,551 | 4,275 | Apr 21, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 137 | $20.22 | $2,770 | 4,440 | Apr 9, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 1,731 | $20.30 | $35,139 | 55,372 | Mar 26, 2025 |
| Cotton Rodney | — | Option Exercise | 5,329 | — | — | 5,329 | Mar 26, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sale | 20,516 | $20.05 | $411,346 | 82,588 | Mar 7, 2025 |
| Oelschlager Kristen M | Chief Operating Officer | Option Exercise | 13,811 | — | — | 167,604 | Mar 4, 2025 |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Tax Withholding | 7,576 | $22.23 | $168,414 | 104,351 | Mar 4, 2025 |