CUSIP: 344174107 | NYSE | Healthcare · Biotechnology | Micro Cap | 225 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 |
|---|---|---|---|---|---|
| 13G/ABVF Inc with BVF GP Holdings LLC, Biotechnology Value Fund L P, BVF I GP LLC, +4 more | 8,507,000 | 14.3% | New 5%+ stake | Oct 1, 2026 | No 13F filer matched |
| 13D/ANoubar Afeyan with Flagship Pioneering, LLC, Flagship Ventures Fund V, L.P., Flagship Ventures Fund V General Partner LLC, +6 more | 20,774,885 | 27.2% | New 5%+ stake | Jan 9, 2026 | No 13F filer matched |
| Style | Turnover | Location | Filed | ||||
|---|---|---|---|---|---|---|---|
| 313,765 | $1.1M | 0.0% | Growth | Medium | Strassen, Netherlands | 2026-11-03 | |
| 151,354 | $540.3K | 0.0% | Core | Medium | Toronto Ontario, Australia | 2026-11-02 | |
| 20,710 | $73.9K | 0.0% | Index | Very Low | Overland Park, KS | 2026-11-02 | |
| 15,770 | $56.3K | 0.0% | Core | Very High | Chicago, IL | 2026-11-04 | |
| 11,700 | $41.8K | 0.0% | Core | Medium | Columbus, OH | 2026-10-30 | |
| 10,835 | $38.1K | 0.0% | Growth | Medium | Shanghai, France | 2026-10-28 | |
| 3,388 | $12.1K | 0.0% | Core | Medium | New York, NY | 2026-11-04 | |
| 3,035 | $10.8K | 0.0% | Growth | Low | Seoul, Malaysia | 2026-11-03 | |
| 1,349 | $4.8K | 0.0% | Agg Growth | Medium | Guangzhou, France | 2026-10-26 | |
| 1,196 | $4.3K | 0.0% | GARP | Medium | Charlotte, NC | 2026-10-22 | |
| 1,000 | $2.9K | 0.0% | Core | Low | Toronto, Australia | 2026-10-16 | |
| 336 | $1.2K | 0.0% | Index | Very Low | Foster City, CA | 2026-10-08 | |
| 247 | $882 | 0.0% | ETF | Very Low | Gap, PA | 2026-11-04 | |
| 123 | $440 | 0.0% | ETF | Very Low | Boston, MA | 2026-10-26 | |
| 102 | $365 | 0.0% | ETF | Very Low | Sylvania, OH | 2026-10-26 | |
| 100 | $357 | 0.0% | Core | Low | Chicago, IL | 2026-10-27 | |
| 100 | $357 | 0.0% | Agg Growth | Low | Tokyo, Mexico | 2026-10-22 | |
| 96 | $343 | 0.0% | Core | Medium | Birmingham, AL | 2026-11-04 | |
| 78 | $278 | 0.0% | Index | Very Low | St. Louis, MO | 2026-10-20 | |
| 48 | $171 | 0.0% | Growth | Very High | Hong Kong, South Korea | 2026-10-29 | |
| 34 | $121 | 0.0% | Value | Medium | Rancho Santa Fe, CA | 2026-10-14 | |
| 29 | $104 | 0.0% | Index | Low | San Francisco, CA | 2026-10-08 | |
| 5 | $18 | 0.0% | ETF | Medium | Encinitas, CA | 2026-10-21 | |
| 1 | $4 | 0.0% | ETF | Medium | Akron, OH | 2026-10-13 |