CUSIP: 86889P208 | NYSE | Healthcare · Biotechnology | Micro Cap | 108 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/ASvennilson Peter with The Column Group III GP, LP, The Column Group III-A, LP, The Column Group III, LP, +3 more | 3,824,612 | 21.5% | Unchanged | Oct 20, 2026 | Not yet in a 13F |
| 13G/A |
| Style | Turnover | Location | Filed | ||||
|---|---|---|---|---|---|---|---|
| 133,207 | $4.3M | 0.1% | Core | Low | Oakland, CA | 2026-10-26 | |
| 17,119 | $550.9K | 0.0% | Core | Low | New York, NY | 2026-11-05 | |
| 5,000 | $159.9K | 0.0% | Growth | Medium | Shanghai, France | 2026-10-28 | |
| 1,000 | $32.2K | 0.0% | Core | Medium | Columbus, OH | 2026-10-30 | |
| 632 | $20.3K | 0.0% | Core | Medium | New York, NY | 2026-11-04 | |
| 526 | $16.9K | 0.0% | Growth | Very High | Hong Kong, South Korea | 2026-10-29 | |
| 241 | $7.8K | 0.0% | GARP | Medium | Charlotte, NC | 2026-10-22 | |
| 62 | $2.0K | 0.0% | Index | Very Low | Foster City, CA | 2026-10-08 | |
| 52 | $1.7K | 0.0% | ETF | Very Low | Sylvania, OH | 2026-10-26 | |
| 14 | $451 | 0.0% | Index | Low | Minneapolis, MN | 2026-11-05 | |
| 5 | $161 | 0.0% | Agg Growth | Low | Tokyo, Mexico | 2026-10-22 |
| 1,360,683 |
| 11.6% |
| +321,666 |
| Sep 30, 2026 |
| No 13F filer matched |
| 13GCommodore Capital LP | 885,000 | 7.5% | New 5%+ stake | Sep 24, 2026 | Not yet in a 13F |
| 13G/AChen Yu with TCG Crossover GP II, LLC, TCG Crossover Fund II, L.P., TCG Crossover Fund III, L.P., +1 more | 1,148,101 | 9.9% | New 5%+ stake | Jul 22, 2026 | No 13F filer matched |
| 13G/A5AM Partners VII, LLC | 968,750 | 7.8% | New 5%+ stake | Jun 30, 2026 | No 13F filer matched |
| 13GStemPoint Capital LP | 602,798 | 5.0% | New 5%+ stake | Jun 30, 2026 | No 13F filer matched |
| 13G/ABraidwell LP | 460,753 | 3.9% | Newly reported | Jun 30, 2026 | No 13F filer matched |
| 13DThe Column Group IV GP, LP with The Column Group IV, LP, The Column Group IV-A, LP | 4,460,979 | 8.3% | New 5%+ stake | Feb 6, 2026 | No 13F filer matched |