David S. Kabakoff is Director at CASTLE BIOSCIENCES INC (CSTL). They have made 26 open-market trades across 3 companies since 2010, most recently 2021-06-17.
CIK 0001024008
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.
2 open-market purchases totalling $1.1M since 2010, against 24 sales. Too few scored purchases to measure a record yet.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 50% | 17% |
| Avg Move | +1.4% | +0.7% | +4.9% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSTL | SELL | 2021-06-17 | 2021-06-21 | $75.07 | $2.3M | -5.0% | -8.3% | -1.7% |
| CSTL | SELL | 2021-04-05 | 2021-04-07 | $72.52 | $11.6M | -9.5% | -16.0% | +0.3% |
| CSTL | SELL | 2021-03-31 | 2021-04-02 | $69.43 | $6.2M | -5.4% | -7.9% | -1.7% |
| CSTL | SELL | 2021-03-19 | 2021-03-23 | $66.65 | $1.3M | +11.2% | -0.7% | +13.5% |
| CSTL | SELL | 2021-03-16 | 2021-03-18 | $63.93 | $8.3M | -1.8% | +2.5% | +13.9% |
| CSTL | SELL | 2020-10-08 | 2020-10-13 | $54.20 | $2.7M | -6.0% | -6.1% | +38.7% |
| CSTL | SELL | 2020-10-06 | 2020-10-08 | $53.09 | $2.7M | -9.3% | -11.9% | +32.1% |
| CSTL | SELL | 2020-10-02 | 2020-10-06 | $52.08 | $2.6M | -7.4% | -3.1% | +27.6% |
| CSTL | SELL | 2020-09-03 | 2020-09-08 | $46.05 | $1.2M | +3.5% | +9.3% | +9.9% |
| CSTL | SELL | 2020-08-19 | 2020-08-21 | $44.78 | $3.4M | -0.3% | +13.2% | +0.6% |
| CSTL | SELL | 2020-08-10 | 2020-08-12 | $42.01 | $1.1M | +9.1% | +16.5% | +19.7% |
| CSTL | SELL | 2020-07-17 | 2020-07-21 | $43.04 | $1.1M | -5.2% | +11.4% | +21.7% |
| CSTL | SELL | 2020-07-09 | 2020-07-13 | $43.60 | $2.2M | -2.5% | +1.8% | +33.3% |
| CSTL | SELL | 2020-06-22 | 2020-06-23 | $40.76 | $9.2M | -7.9% | -7.0% | +20.7% |
| CSTL | SELL | 2020-05-12 | 2020-05-14 | $34.50 | $8.6M | +8.0% | +9.5% | +18.3% |
| CSTL | SELL | 2020-02-19 | 2020-02-21 | $32.03 | $801K | -2.9% | -19.0% | +17.2% |
| CSTL | SELL | 2020-02-13 | 2020-02-18 | $32.01 | $800K | -6.1% | -23.1% | +11.8% |
| CSTL | SELL | 2020-02-06 | 2020-02-10 | $31.03 | $776K | +8.2% | -3.2% | +8.6% |
| CSTL | SELL | 2020-01-31 | 2020-02-04 | $30.54 | $1.5M | +3.3% | +5.6% | -11.4% |
| CSTL | SELL | 2020-01-28 | 2020-01-30 | $30.02 | $751K | +1.0% | +2.9% | +1.9% |
| CSTL | BUY | 2019-07-29 | 2019-07-31 | $16.00 | $1.0M | +4.8% | +40.9% | +1.2% |
| CSTL | SELL | 2019-07-29 | 2019-07-31 | $16.00 | $144 | +4.8% | +40.9% | +1.2% |
| ITMN | SELL | 2014-05-29 | 2014-06-02 | $39.56 | $198K | N/A | N/A | N/A |
| ITMN | SELL | 2013-08-30 | 2013-09-04 | $14.82 | $148K | N/A | N/A | N/A |
| ITMN | SELL | 2011-06-02 | 2011-06-03 | $36.41 | $73K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.