Over the 90-day window ending February 07, 2026, Castle Biosciences's three dominant insider ownership positions are held by Director David S Kabakoff (503.58K shares), Chief Operating Officer Kristen M Oelschlager (122.47K shares), Chief Commercial Officer Tobin W Juvenal (98.26K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| David S Kabakoff | 503,577 | 21 Jun, 2021 | |
| Kristen M Oelschlager | Chief Operating Officer | 122,467 | 14 Jan, 2026 |
| Tobin W Juvenal | Chief Commercial Officer | 98,262 | 14 Jan, 2026 |
| Derek J Maetzold | Pres. & Chief Exec. Officer | 87,313 | 05 Feb, 2026 |
| Frank Stokes | Chief Financial Officer | 58,450 | 14 Jan, 2026 |
| 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 | |
| Miles Harrison | 21,964 | 23 May, 2025 | |
| G Bradley Cole | 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 |
|---|---|---|---|---|---|---|---|---|
| 04 Feb, 2026 | Derek J Maetzold | Common Stock | D | 171 | $38.61 | 83,698 | D | S |
| 04 Feb, 2026 | Derek J Maetzold | Common Stock | D | 646 | $37.82 | 83,869 | D | S |
| 03 Feb, 2026 | Derek J Maetzold | Common Stock | D | 3,200 | $39.91 | 84,515 | D | S |
| 20 Jan, 2026 | Derek J Maetzold | Common Stock | D | 4,017 | $40.01 | 87,715 | D | S |
| 12 Jan, 2026 | Derek J Maetzold | Common Stock | A | 62,219 | $0.00 | 91,732 | D | A |
| 12 Jan, 2026 | Frank Stokes | Common Stock | A | 8,124 | $0.00 | 58,450 | D | A |
| 12 Jan, 2026 | Tobin W Juvenal | Common Stock | A | 9,207 | $0.00 | 96,032 | D | A |
| 12 Jan, 2026 | Kristen M Oelschlager | Common Stock | A | 9,207 | $0.00 | 21,530 | D | A |
| 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 |