Through the 90-day period concluding December 17, 2025, Castle Biosciences's top three insider stakeholders include Chief Operating Officer Kristen M Oelschlager (128.15K shares), Chief Commercial Officer Tobin W Juvenal (89.06K shares), Pres. & Chief Exec. Officer Derek J Maetzold (70.83K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| David S Kabakoff | 503,577 | 21 Jun, 2021 | |
| Kristen M Oelschlager | Chief Operating Officer | 128,148 | 11 Dec, 2025 |
| Joseph C. Iii Cook | 124,407 | 22 Mar, 2021 | |
| Tobin W Juvenal | Chief Commercial Officer | 89,055 | 15 Dec, 2025 |
| Derek J Maetzold | Pres. & Chief Exec. Officer | 70,830 | 11 Dec, 2025 |
| Frank Stokes | Chief Financial Officer | 50,326 | 15 Dec, 2025 |
| Mara G. Aspinall | 44,139 | 04 Jun, 2024 | |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 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 |
| 09 Dec, 2025 | Frank Stokes | Common Stock | A | 14,616 | - | 57,944 | D | M |
| 09 Dec, 2025 | Tobin W Juvenal | Common Stock | A | 15,961 | - | 102,786 | D | M |
| 09 Dec, 2025 | Kristen M Oelschlager | Common Stock | A | 15,961 | - | 28,284 | D | M |
| 09 Dec, 2025 | Derek J Maetzold | Common Stock | A | 33,495 | - | 71,042 | D | M |
| 09 Dec, 2025 | Tobin W Juvenal | Common Stock | D | 6,441 | $38.25 | 96,345 | D | F |
| 09 Dec, 2025 | Frank Stokes | Common Stock | D | 6,534 | $38.25 | 51,410 | D | F |
| 09 Dec, 2025 | Derek J Maetzold | Common Stock | D | 13,181 | $38.25 | 57,861 | D | F |
| 09 Dec, 2025 | Kristen M Oelschlager | Common Stock | D | 4,691 | $38.25 | 23,593 | D | F |
| 10 Dec, 2025 | Tobin W Juvenal | Common Stock | A | 6,170 | - | 102,515 | D | M |
| 10 Dec, 2025 | Frank Stokes | Common Stock | A | 6,170 | - | 57,580 | D | M |
| 10 Dec, 2025 | Kristen M Oelschlager | Common Stock | A | 6,170 | - | 29,763 | D | M |
| 10 Dec, 2025 | Derek J Maetzold | Common Stock | A | 15,424 | - | 73,285 | D | M |
| 10 Dec, 2025 | Frank Stokes | Common Stock | D | 2,758 | $38.02 | 54,822 | D | F |
| 10 Dec, 2025 | Derek J Maetzold | Common Stock | D | 6,070 | $38.02 | 67,215 | D | F |
| 10 Dec, 2025 | Tobin W Juvenal | Common Stock | D | 2,490 | $38.02 | 100,025 | D | F |
| 10 Dec, 2025 | Kristen M Oelschlager | Common Stock | D | 2,552 | $38.02 | 27,211 | D | F |
| 04 Dec, 2025 | Derek J Maetzold | Common Stock | D | 1,339 | $40.03 | 37,547 | D | S |
| 02 Dec, 2025 | Derek J Maetzold | Common Stock | D | 2,678 | $39.23 | 38,886 | D | S |