Joseph C. Cook III is Director at CASTLE BIOSCIENCES INC (CSTL). They have made 26 open-market trades across 1 company since 2019, most recently 2021-03-18.
CIK 0001783205
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.
1 open-market purchase totalling $5.4M since 2019, against 25 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CSTL | 124,407 | $4.0M |
Shares reported on the most recent Form 4, priced at the 2021-03-22 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 17% | 0% |
| Avg Move | +1.3% | +5.6% | +20.0% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSTL | SELL | 2020-12-16 | 2020-12-18 | $66.35 | $18.5M | +7.8% | +25.7% | +1.1% |
| CSTL | SELL | 2020-12-11 | 2020-12-14 | $59.67 | $2.3M | +16.2% | +19.2% | +7.2% |
| CSTL | SELL | 2020-12-09 | 2020-12-11 | $58.38 | $8.6M | +19.8% | +27.0% | +13.0% |
| CSTL | SELL | 2020-12-07 | 2020-12-09 | $56.22 | $4.7M | +25.0% | +38.4% | +8.0% |
| CSTL | SELL | 2020-10-12 | 2020-10-14 | $54.75 | $5.3M | -2.0% | -3.2% | +51.8% |
| CSTL | SELL | 2020-09-09 | 2020-09-11 | $49.97 | $564K | +1.8% | +11.0% | +19.7% |
| CSTL | SELL | 2020-09-04 | 2020-09-09 | $47.66 | $11.9M | +2.6% | +8.3% | +9.3% |
| CSTL | SELL | 2020-09-02 | 2020-09-04 | $46.01 | $2.2M | +1.1% | +10.7% | +6.2% |
| CSTL | SELL | 2020-08-31 | 2020-09-02 | $45.94 | $4.4M | +4.9% | +11.3% | +7.8% |
| CSTL | SELL | 2020-08-27 | 2020-08-31 | $46.03 | $6.6M | +6.4% | +12.5% | +4.0% |
| CSTL | SELL | 2020-08-25 | 2020-08-27 | $45.89 | $2.0M | +9.4% | +9.2% | -4.7% |
| CSTL | SELL | 2020-08-21 | 2020-08-25 | $45.88 | $1.4M | +4.5% | +8.2% | +2.5% |
| CSTL | SELL | 2020-08-19 | 2020-08-21 | $45.84 | $1.6M | -0.3% | +13.2% | +0.6% |
| CSTL | SELL | 2020-07-09 | 2020-07-13 | $43.43 | $4.4M | -2.5% | +1.8% | +33.3% |
| CSTL | SELL · 10b5-1 | 2020-06-24 | 2020-06-26 | $43.11 | $4K | +24.4% | +13.2% | +41.2% |
| CSTL | SELL | 2020-06-19 | 2020-06-23 | $43.20 | $4.5M | -7.9% | -7.0% | +20.7% |
| CSTL | SELL | 2020-06-17 | 2020-06-19 | $41.73 | $6.0M | -7.7% | +0.5% | +14.6% |
| CSTL | SELL | 2020-06-15 | 2020-06-17 | $39.63 | $1.9M | -5.7% | +11.9% | +26.2% |
| CSTL | SELL | 2020-06-10 | 2020-06-12 | $39.00 | $82K | +7.3% | +13.0% | +33.4% |
| CSTL | SELL | 2020-06-02 | 2020-06-04 | $39.01 | $340K | +3.0% | +5.1% | +21.2% |
| CSTL | SELL · 10b5-1 | 2020-06-01 | 2020-06-03 | $39.06 | $14K | +7.4% | +10.0% | +27.7% |
| CSTL | SELL | 2020-05-28 | 2020-06-01 | $38.65 | $1.2M | -4.3% | +1.3% | +18.4% |
| CSTL | SELL | 2020-05-26 | 2020-05-28 | $38.28 | $2.8M | +0.3% | -5.3% | +19.7% |
| CSTL | SELL | 2020-05-21 | 2020-05-26 | $37.34 | $1.6M | +1.8% | +0.1% | +23.2% |
| CSTL | SELL | 2020-05-19 | 2020-05-21 | $37.10 | $782K | -4.2% | +10.4% | +20.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.