David N. Cook is CSO & VP at Seres Therapeutics, Inc. (MCRB). They have made 6 open-market trades across 2 companies since 2016, most recently 2022-02-28.
CIK 0001233684
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 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| FMTX | SELL | 2022-02-23 | 2022-02-25 | $9.78 | $35K | -8.2% | -8.0% | -46.4% |
| MCRB | SELL | 2018-01-26 | 2018-01-30 | $11.02 | $19K | -20.1% | -9.7% | -27.4% |
| MCRB | SELL | 2016-06-02 | 2016-06-06 | $31.00 | $248K | -7.3% | -5.7% | -66.4% |
| MCRB | SELL | 2016-06-01 | 2016-06-02 | $29.43 | $471K | -4.6% | -9.0% | -67.3% |
| MCRB | SELL | 2016-04-07 | 2016-04-11 | $31.00 | $248K | +3.6% | -16.2% | +0.9% |
| MCRB | SELL | 2016-04-01 | 2016-04-05 | $26.16 | $1.6M | +6.7% | -10.6% | +3.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.