Tobin W. Juvenal is CCO at CASTLE BIOSCIENCES INC (CSTL). They have made 3 open-market trades across 1 company since 2021, most recently 2026-10-12.
CIK 0001856542
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 3 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CSTL | 48,719 | $1.6M |
Shares reported on the most recent Form 4, priced at the 2026-10-14 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 | 2026-10-12 | 2026-10-14 | $33.64 | $111K | — | — | — |
| CSTL | SELL · 10b5-1 | 2026-09-29 | 2026-10-01 | $35.29 | $232K | -8.0% | — | — |
| CSTL | SELL · 10b5-1 | 2026-09-14 | 2026-09-16 | $33.73 | $223K | +2.2% | -9.1% | — |
| CSTL | SELL · 10b5-1 | 2026-08-31 | 2026-09-02 | $32.81 | $57K | +9.4% | +9.6% | — |
| CSTL | SELL · 10b5-1 | 2026-08-25 | 2026-08-27 | $35.04 | $317K | -4.9% | +5.6% | — |
| CSTL | SELL · 10b5-1 | 2026-08-17 | 2026-08-19 | $29.59 | $51K | +0.4% | +7.4% | — |
| CSTL | SELL · 10b5-1 | 2026-07-31 | 2026-08-04 | $29.21 | $556K | -3.5% | +6.4% | — |
| CSTL | SELL | 2026-03-12 | 2026-03-16 | $25.24 | $527K | -5.2% | -5.5% | -20.8% |
| CSTL | SELL | 2025-12-11 | 2025-12-15 | $37.48 | $989K | +2.4% | +6.0% | -32.8% |
| CSTL | SELL · 10b5-1 | 2025-11-20 | 2025-11-24 | $35.58 | $334K | +0.1% | +3.8% | -25.0% |
| CSTL | SELL · 10b5-1 | 2025-11-11 | 2025-11-14 | $35.39 | $25K | +18.8% | +15.7% | -5.1% |
| CSTL | SELL · 10b5-1 | 2025-01-06 | 2025-01-08 | $30.00 | $67K | -14.2% | -11.0% | -40.0% |
| CSTL | SELL · 10b5-1 | 2024-11-05 | 2024-11-07 | $35.56 | $249K | -14.3% | -8.3% | -16.6% |
| CSTL | SELL · 10b5-1 | 2024-11-01 | 2024-11-05 | $35.39 | $110K | -14.6% | -2.2% | -12.6% |
| CSTL | SELL | 2021-06-17 | 2021-06-21 | $75.40 | $754K | -5.0% | -8.3% | -1.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.