| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Medicxi Ventures Management (Jersey) Ltd | 19.96M (21.59%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 2 | venBio Select Advisor LLC | 11.43M (12.36%) | -3.13M Decreased by -27.34% | Mar 31, 26 |
| 3 | Index Venture Life Associates VI Ltd | 9.96M (10.77%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 4 | Bvf Inc | 9.10M (9.84%) | -320.16K Decreased by -3.52% | Sep 30, 23 |
| 5 | Adage Capital Partners Gp LLC | 8.93M (9.65%) | -2.36M Decreased by -26.41% | Mar 31, 26 |
| 6 | Pentwater Capital Management LP | 8.17M (8.83%) | 8.17M Increased by +100.00% | Mar 31, 26 |
| 7 | FMR Inc | 6.85M (7.41%) | -2.11M Decreased by -30.79% | Mar 31, 26 |
| 8 | General Atlantic Llc | 6.12M (6.62%) | -3.56M Decreased by -58.26% | Dec 31, 25 |
| 9 | EcoR1 Capital, LLC | 6.00M (6.49%) | 2.88M Increased by +48.08% | Mar 31, 26 |
| 10 | Perceptive Advisors LLC | 5.26M (5.69%) | 2.34M Increased by +44.52% | Mar 31, 26 |
| 11 | Capital World Investors | 4.83M (5.23%) | 3.67M Increased by +76.02% | Mar 31, 26 |
| 12 | Farallon Capital Management, L.L.C. | 4.81M (5.20%) | -568.07K Decreased by -11.81% | Mar 31, 26 |
| 13 | TCG Crossover Management, LLC | 4.29M (4.63%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 14 | Morgan Stanley - Brokerage Accounts | 4.27M (4.62%) | 3.16M Increased by +74.02% | Mar 31, 26 |
| 15 | Siren, L.L.C. | 4.03M (4.35%) | 800.00K Increased by +19.86% | Dec 31, 25 |
| 16 | Vida Ventures Advisors, LLC | 3.93M (4.25%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 17 | T. Rowe Price Associates, Inc. | 3.93M (4.25%) | -876.71K Decreased by -22.32% | Dec 31, 25 |
| 18 | Paradigm Biocapital Advisors LP | 3.57M (3.86%) | 3.57M Increased by +100.00% | Mar 31, 26 |
| 19 | HHG PLC | 3.49M (3.78%) | -600.63K Decreased by -17.20% | Mar 31, 26 |
| 20 | Deep Track Capital, LP | 3.16M (3.41%) | 1.16M Increased by +36.67% | Mar 31, 26 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | American Funds SMALLCAP World A | 4.42M (4.78%) | 3.29M Increased by +74.29% | Mar 31, 26 |
| 2 | Fidelity® Select Biotechnology | 2.79M (3.01%) | 0.00 Increased by 0.00% | Nov 30, 23 |
| 3 | Fidelity Select Biotechnology | 2.15M (2.32%) | -39.80K Decreased by -1.85% | Mar 31, 26 |
| 4 | T. Rowe Price Health Sciences | 1.89M (2.05%) | -300.66K Decreased by -15.88% | Jan 31, 26 |
| 5 | Fidelity Select Health Care | 1.65M (1.78%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 6 | Fidelity Contrafund | 1.32M (1.43%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 7 | Federated Hermes Kaufmann Growth | 1.24M (1.34%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 8 | Federated Hermes Kaufmann R | 1.24M (1.34%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 9 | Franklin Biotechnology Discv A(acc)USD | 1.06M (1.15%) | 0.00 Increased by 0.00% | Feb 28, 26 |
| 10 | Polar Capital Biotech S Inc | 1.00M (1.08%) | 0.00 Increased by 0.00% | Jul 31, 25 |
| 11 | Janus Henderson US SMID Cap Growth MA | 953.94K (1.03%) | 953.86K Increased by +99.99% | Jun 30, 25 |
| 12 | Janus Henderson US SMID Cap Growth | 853.85K (0.92%) | -20.96K Decreased by -2.45% | Mar 31, 26 |
| 13 | Janus Henderson Triton D | 853.85K (0.92%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 14 | Fidelity Advisor Health Care I | 850.00K (0.92%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 15 | Strategic Advisers Fidelity US TtlStk | 800.00K (0.87%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 16 | Federated Hermes Kaufmann Small Cap A | 787.00K (0.85%) | -292.70K Decreased by -37.19% | Mar 31, 26 |
| 17 | Federated Hermes Kaufmann Small Cap Grow | 787.00K (0.85%) | -292.70K Decreased by -37.19% | Mar 31, 26 |
| 18 | Fidelity VIP Mid Cap Initial | 702.20K (0.76%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 19 | US Small-Cap Growth II Equity Comp | 679.54K (0.73%) | -72.80K Decreased by -10.71% | Jun 30, 25 |
| 20 | Eventide Healthcare & Life Sciences I | 668.14K (0.72%) | 668.14K Increased by +100.00% | Mar 31, 26 |