CUSIP: 107924102 | NYSE | Healthcare · Biotechnology | Small Cap | 97 institutional holders
5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.
| Holder | Shares | % of Class | Change | Event Date | vs 13F |
|---|---|---|---|---|---|
| 13D/ABihua Chen with Cormorant Global Healthcare GP, LLC, Cormorant Global Healthcare Master Fund, LP, Cormorant Private Healthcare GP V, LLC, +4 more | 17,878,594 | 22.3% | New 5%+ stake | Jul 1, 2026 | No 13F filer matched |
| Style | Turnover | Location | Filed | ||||
|---|---|---|---|---|---|---|---|
| 2,509,446 | $10.3M | 0.2% | Core | Low | Oakland, CA | 2026-10-26 | |
| 2,002,701 | $8.2M | 0.1% | Growth | Very High | New York, NY | 2026-10-30 | |
| 99,750 | $409.0K | 0.0% | Growth | Medium | New York, NY | 2026-10-16 | |
| 52,406 | $214.1K | 0.0% | Index | Low | Austin, TX | 2026-11-04 | |
| 38,846 | $159.3K | 0.0% | Value | Very High | Hong Kong, South Korea | 2026-10-16 | |
| 16,000 | $62.7K | 0.0% | Growth | Medium | Shanghai, France | 2026-10-28 | |
| 10,875 | $44.6K | 0.0% | Core | Medium | New York, NY | 2026-11-04 | |
| 1,600 | $6.6K | 0.0% | Core | Low | Leesburg, VA | 2026-10-08 | |
| 187 | $767 | 0.0% | Agg Growth | Low | Tokyo, Mexico | 2026-10-22 |