| $350M | ||
| $217M | ||
| $172M | ||
| $109M | ||
| $107M | ||
| $104M |
Buys | $0 | 0 | 0 |
Sells | $18,828,858 | 75 | 100 |
| Cole G Bradley | director | 0 | $0 | 1 | $210,727 | $-210,727 |
| Stokes Frank | Chief Financial Officer | 0 | $0 | 5 | $1.46M | $-1.46M |
| Oelschlager Kristen M | Chief Operating Officer | 0 | $0 | 9 | $3.02M | $-3.02M |
| Juvenal Tobin W | Chief Commercial Officer | 0 | $0 | 18 | $3.16M | $-3.16M |
| MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 0 | $0 | 42 | $10.98M | $-10.98M |
Castle Biosciences, Inc. functions as a commercial-stage diagnostics firm, with its primary objective being the provision of both diagnostic and prognostic testing services, specifically targeting various dermatological cancers. Their flagship product, DecisionDx-Melanoma, represents an advanced multi-gene expression profile (GEP) assay engineered to assess the probability of metastasis in patients afflicted with invasive cutaneous melanoma. In addition to their leading solution, the company has created several other specialized, proprietary …
Over the last 12 months, insiders at Castle Biosciences, Inc. have bought $0 and sold $18.83M worth of Castle Biosciences, Inc. stock.
On average, over the past 5 years, insiders at Castle Biosciences, Inc. have bought $49,058 and sold $9.99M worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 4,800 shares for transaction amount of $69,004 was made by Goldberg Ellen (director) on 2023‑06‑05.
| 2026-10-28 | Sale | Juvenal Tobin W | Chief Commercial Officer | 6,578 0.0214% | $36.42 | $239,591 | -1.44% | |
| 2026-10-26 | Sale | Juvenal Tobin W | Chief Commercial Officer | 3,288 0.0107% | $33.08 | $108,767 | +7.84% | |
| 2026-10-19 | Sale | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 14,496 0.0471% | $31.91 | $462,567 | +7.29% | |
| 2026-10-12 | Sale | Juvenal Tobin W | Chief Commercial Officer | 3,288 0.0111% | $33.64 | $110,608 | +2.41% | |
| 2026-10-05 | Sale | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 14,496 0.0463% | $35.57 | $515,565 | -8.98% | |
| 2026-10-01 | Sale | Oelschlager Kristen M | Chief Operating Officer | 4,153 0.0139% | $35.95 | $149,318 | -4.38% | |
| 2026-09-30 | Sale | Juvenal Tobin W | Chief Commercial Officer | 1,034 0.0033% | $34.20 | $35,363 | -5.00% | |
| 2026-09-29 | Sale | Juvenal Tobin W | Chief Commercial Officer | 5,543 0.0185% | $35.50 | $196,765 | -3.10% | |
| 2026-09-21 | Sale | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 14,496 0.0474% | $35.33 | $512,202 | -1.37% | |
| 2026-09-15 | Sale | Juvenal Tobin W | Chief Commercial Officer | 3,294 0.0107% | $35.14 | $115,758 | -1.75% | |
| 2026-09-14 | Sale | Juvenal Tobin W | Chief Commercial Officer | 3,306 0.0105% | $32.32 | $106,863 | +4.31% | |
| 2026-09-11 | Sale | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 14,518 0.0473% | $32.02 | $464,870 | +7.89% | |
| 2026-09-01 | Sale | Oelschlager Kristen M | Chief Operating Officer | 4,152 0.0136% | $33.39 | $138,643 | +2.86% | |
| 2026-08-31 | Sale | Juvenal Tobin W | Chief Commercial Officer | 1,730 0.0057% | $32.81 | $56,761 | +4.06% | |
| 2026-08-28 | Sale | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | 17,726 0.0578% | $33.20 | $588,448 | +1.75% | |
| 2026-08-25 | Sale | Oelschlager Kristen M | Chief Operating Officer | 12,384 0.0399% | $34.42 | $426,277 | -2.63% | |
| 2026-08-25 | Sale | Juvenal Tobin W | Chief Commercial Officer | 9,050 0.0297% | $35.04 | $317,112 | -2.63% | |
| 2026-08-24 | Sale | Oelschlager Kristen M | Chief Operating Officer | 12,218 0.0405% | $33.69 | $411,588 | +2.09% | |
| 2026-08-17 | Sale | Juvenal Tobin W | Chief Commercial Officer | 1,730 0.0056% | $29.59 | $51,191 | +12.85% | |
| 2026-08-14 | Sale | Stokes Frank | Chief Financial Officer | 24,908 0.0824% | $29.77 | $741,511 | +13.96% |
| MGC Venture Partners 2013 GP, LLC | 10 percent owner | 1464020 4.7923% | $51.45M | 1 | 3 | +21.26% |
| Sofinnova HealthQuest Partners, L.P. | 1433577 4.6926% | $50.38M | 1 | 8 | +21.26% | |
| KABAKOFF DAVID S | director | 503577 1.6484% | $17.7M | 1 | 29 | +21.26% |
| Cook Joseph C. III | director | 112178 0.3672% | $3.94M | 1 | 46 | +21.26% |
| Aspinall Mara G. | director | 30848 0.101% | $1.08M | 1 | 4 | +21.26% |
| Goldberg Ellen | director | 9065 0.0297% | $318,544.10 | 1 | 0 | +67.37% |
| Olson Tiffany | director | 2968 0.0097% | $104,295.52 | 2 | 0 | +8.72% |
| Increased Positions | 113 | +58.25% | 5M | +19.24% |
| Decreased Positions | 88 | -45.36% | 4M | -16.07% |
| New Positions | 47 | New | 3M | New |
| Sold Out Positions | 19 | Sold Out | 377,639 | Sold Out |
| Total Postitions | 219 | +12.89% | 28M | +3.16% |
| Blackrock, Inc. | $122,939.00 | 11% | 3.19M | +35,217 | +1.12% | 2025-09-30 |
| Vanguard Group Inc | $83,721.00 | 7.49% | 2.17M | +2,290 | +0.11% | 2025-09-30 |
| Principal Financial Group Inc | $69,154.00 | 6.19% | 1.79M | -4,619 | -0.26% | 2025-09-30 |
| Portolan Capital Management, Llc | $58,392.00 | 5.23% | 1.52M | +25,539 | +1.72% | 2025-09-30 |
| Dimensional Fund Advisors Lp | $56,811.00 | 5.08% | 1.47M | +96,084 | +6.97% | 2025-09-30 |
| Nuveen, Llc | $36,886.00 | 3.3% | 957,081 | -116,026 | -10.81% | 2025-09-30 |
| Braidwell Lp | $31,708.00 | 2.84% | 822,735 | 0 | 0% | 2025-09-30 |
| State Street Corp | $27,906.00 | 2.5% | 724,080 | +16,393 | +2.32% | 2025-09-30 |
| Aigh Capital Management Llc | $27,259.00 | 2.44% | 707,287 | +707,287 | New | 2025-09-30 |
| Geode Capital Management, Llc | $26,924.00 | 2.41% | 698,610 | +8,684 | +1.26% | 2025-09-30 |