THIRD ROCK Ventures L.P. is 10% at bluebird bio, Inc. (BLUE). They have made 1 open-market trade across 1 company since 2014, most recently 2018-07-23.
CIK 0001408591
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BLUE | SELL | 2014-09-11 | 2014-09-12 | $36.54 | $4.6M | -26.5% | +1.0% | +1.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.