Kristen M. Oelschlager is COO at CASTLE BIOSCIENCES INC (CSTL). They have made 4 open-market trades across 1 company since 2021, most recently 2026-10-01.
CIK 0001856565
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CSTL | 13,356 | $427K |
Shares reported on the most recent Form 4, priced at the 2026-10-05 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSTL | SELL · 10b5-1 | 2026-10-01 | 2026-10-05 | $35.95 | $149K | -8.0% | — | — |
| CSTL | SELL · 10b5-1 | 2026-09-01 | 2026-09-03 | $33.39 | $139K | +9.8% | +14.0% | — |
| CSTL | SELL | 2026-08-24 | 2026-08-26 | $34.06 | $838K | -4.1% | +5.1% | — |
| CSTL | SELL · 10b5-1 | 2026-08-03 | 2026-08-05 | $29.77 | $256K | -0.9% | +9.1% | — |
| CSTL | SELL · 10b5-1 | 2026-07-01 | 2026-07-06 | $24.42 | $210K | +0.6% | +26.0% | +52.1% |
| CSTL | SELL · 10b5-1 | 2026-06-16 | 2026-06-18 | $20.71 | $178K | +16.5% | +12.5% | +66.2% |
| CSTL | SELL | 2025-12-17 | 2025-12-19 | $39.31 | $1.2M | -3.6% | +2.1% | -35.8% |
| CSTL | SELL · 10b5-1 | 2025-11-11 | 2025-11-13 | $35.10 | $1.3M | +20.9% | +17.7% | -2.1% |
| CSTL | SELL · 10b5-1 | 2025-10-31 | 2025-11-04 | $25.04 | $635K | +6.0% | +25.5% | +25.1% |
| CSTL | SELL · 10b5-1 | 2025-08-27 | 2025-08-29 | $22.02 | $279K | -4.9% | -6.5% | +67.0% |
| CSTL | SELL | 2025-08-27 | 2025-08-29 | $21.69 | $781K | -4.9% | -6.5% | +67.0% |
| CSTL | SELL · 10b5-1 | 2024-09-03 | 2024-09-05 | $29.21 | $170K | +5.9% | +0.1% | +8.1% |
| CSTL | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $23.06 | $599K | +3.4% | +10.1% | +28.2% |
| CSTL | SELL · 10b5-1 | 2024-07-29 | 2024-07-31 | $22.06 | $123K | +11.2% | +23.4% | +40.5% |
| CSTL | SELL · 10b5-1 | 2024-07-01 | 2024-07-03 | $21.22 | $119K | +2.0% | +16.5% | +46.8% |
| CSTL | SELL | 2021-09-27 | 2021-09-29 | $71.02 | $1.4M | -6.3% | -4.2% | -36.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.