Through the 90-day period concluding January 10, 2026, Castle Biosciences's top three insider stakeholders include Director David S Kabakoff (503.58K shares), Chief Operating Officer Kristen M Oelschlager (113.26K shares), Chief Commercial Officer Tobin W Juvenal (89.06K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| David S Kabakoff | 503,577 | 21 Jun, 2021 | |
| Kristen M Oelschlager | Chief Operating Officer | 113,260 | 19 Dec, 2025 |
| Tobin W Juvenal | Chief Commercial Officer | 89,055 | 15 Dec, 2025 |
| Frank Stokes | Chief Financial Officer | 50,326 | 15 Dec, 2025 |
| Mara G. Aspinall | 44,139 | 04 Jun, 2024 | |
| Derek J Maetzold | Pres. & Chief Exec. Officer | 33,128 | 07 Jan, 2026 |
| Ellen Goldberg | 27,254 | 23 May, 2025 | |
| Tiffany Olson | 25,906 | 23 May, 2025 | |
| Kim Caple | 22,454 | 23 May, 2025 | |
| G Bradley Cole | 21,964 | 23 May, 2025 | |
| Miles Harrison | 21,964 | 23 May, 2025 | |
| Bernhard E. Spiess | Chief Business Officer | 14,696 | 14 Dec, 2021 |
| Rodney Cotton | 14,002 | 23 May, 2025 | |
| Daniel Bradbury | 8,673 | 23 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 06 Jan, 2026 | Derek J Maetzold | Common Stock | D | 1,339 | $40.10 | 29,513 | D | S |
| 05 Jan, 2026 | Derek J Maetzold | Common Stock | D | 2,678 | $38.09 | 30,852 | D | S |
| 22 Dec, 2025 | Derek J Maetzold | Common Stock | D | 830 | $40.35 | 33,530 | D | S |
| 17 Dec, 2025 | Derek J Maetzold | Common Stock | D | 509 | $40.04 | 34,360 | D | S |
| 17 Dec, 2025 | Kristen M Oelschlager | Common Stock | D | 14,888 | $39.31 | 12,323 | D | S |
| 16 Dec, 2025 | Derek J Maetzold | Common Stock | D | 12,821 | $38.55 | 34,869 | D | S |
| 15 Dec, 2025 | Derek J Maetzold | Common Stock | D | 1,012 | $39.30 | 47,690 | D | S |
| 15 Dec, 2025 | Derek J Maetzold | Common Stock | D | 18,513 | $38.75 | 48,702 | D | S |
| 11 Dec, 2025 | Frank Stokes | Common Stock | D | 4,496 | $37.45 | 50,326 | D | S |
| 11 Dec, 2025 | Tobin W Juvenal | Common Stock | D | 13,200 | $37.48 | 86,825 | D | S |
| 10 Dec, 2025 | Derek J Maetzold | Common Stock | D | 6,070 | $38.02 | 67,215 | D | F |
| 10 Dec, 2025 | Derek J Maetzold | Common Stock | A | 15,424 | - | 73,285 | D | M |
| 10 Dec, 2025 | Frank Stokes | Common Stock | A | 6,170 | - | 57,580 | D | M |
| 10 Dec, 2025 | Frank Stokes | Common Stock | D | 2,758 | $38.02 | 54,822 | D | F |
| 10 Dec, 2025 | Frank Stokes | - | - | 54,822 | D | |||
| 10 Dec, 2025 | Frank Stokes | - | - | 57,580 | D | |||
| 10 Dec, 2025 | Tobin W Juvenal | Common Stock | D | 2,490 | $38.02 | 100,025 | D | F |
| 10 Dec, 2025 | Tobin W Juvenal | Common Stock | A | 6,170 | - | 102,515 | D | M |
| 10 Dec, 2025 | Kristen M Oelschlager | Common Stock | D | 2,552 | $38.02 | 27,211 | D | F |
| 10 Dec, 2025 | Kristen M Oelschlager | Common Stock | A | 6,170 | - | 29,763 | D | M |