| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | venBio Select Advisor LLC | 5.96M (10.54%) | -190.41K Decreased by -3.19% | Mar 31, 26 |
| 2 | Aberdeen Group PLC | 5.31M (9.39%) | 1.63M Increased by +30.68% | Mar 31, 26 |
| 3 | EcoR1 Capital, LLC | 3.99M (7.06%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 4 | Vestal Point Capital LP | 3.70M (6.55%) | -1.09M Decreased by -29.53% | Jun 30, 25 |
| 5 | State Street Corporation | 3.48M (6.15%) | 28.59K Increased by +0.82% | Dec 31, 23 |
| 6 | JPMorgan Chase & Co | 2.84M (5.02%) | -97.16K Decreased by -3.42% | Mar 31, 26 |
| 7 | Two Sigma Investments LLC | 2.68M (4.73%) | 1.22M Increased by +45.76% | Mar 31, 26 |
| 8 | RTW INVESTMENTS, LLC | 2.59M (4.58%) | -1.13M Decreased by -43.50% | Mar 31, 26 |
| 9 | State Street Corp | 2.26M (4.00%) | -970.53K Decreased by -42.93% | Mar 31, 26 |
| 10 | Boxer Capital LLC | 2.23M (3.94%) | 2.23M Increased by +100.00% | Sep 30, 24 |
| 11 | Orbimed Advisors, LLC | 2.14M (3.78%) | 1.40M Increased by +65.48% | Mar 31, 26 |
| 12 | Jefferies Financial Group Inc | 2.10M (3.71%) | 2.10M Increased by +100.00% | Jun 30, 25 |
| 13 | Franklin Resources Inc | 1.99M (3.52%) | 383.07K Increased by +19.26% | Sep 30, 25 |
| 14 | Point72 Asset Management, L.P. | 1.77M (3.13%) | 794.46K Increased by +44.85% | Dec 31, 24 |
| 15 | FMR Inc | 1.74M (3.08%) | -4.50M Decreased by -257.89% | Mar 31, 26 |
| 16 | BlackRock Inc | 1.73M (3.07%) | -241.53K Decreased by -13.93% | Mar 31, 26 |
| 17 | Sofinnova Ventures | 1.56M (2.76%) | 1.01M Increased by +64.98% | Jun 30, 25 |
| 18 | abrdn PLC | 1.51M (2.67%) | -419.73K Decreased by -27.81% | Dec 31, 24 |
| 19 | Goldman Sachs Group Inc | 1.39M (2.46%) | 928.87K Increased by +66.79% | Dec 31, 23 |
| 20 | MPM Oncology Impact Management LP | 1.37M (2.42%) | -12.40K Decreased by -0.91% | Mar 31, 26 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | abrdn Healthcare Investors | 2.07M (3.67%) | -19.98K Decreased by -0.96% | May 31, 26 |
| 2 | State Street® SPDR® S&P® Biotech ETF | 1.88M (3.32%) | -11.55K Decreased by -0.62% | May 31, 26 |
| 3 | RTW Biotech Opportunities Ord | 1.39M (2.46%) | 1.39M Increased by +100.00% | Jun 30, 25 |
| 4 | abrdn World Healthcare | 1.27M (2.25%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 5 | abrdn Healthcare Opportunities | 966.85K (1.71%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 6 | abrdn Life Sciences Investors | 962.13K (1.70%) | -10.79K Decreased by -1.12% | May 31, 26 |
| 7 | SPDR® S&P Biotech ETF | 838.29K (1.48%) | 1.87K Increased by +0.22% | Aug 31, 25 |
| 8 | Delaware Healthcare I | 706.17K (1.25%) | 0.00 Increased by 0.00% | Sep 30, 24 |
| 9 | Macquarie Healthcare I | 706.17K (1.25%) | 0.00 Increased by 0.00% | Jul 31, 25 |
| 10 | Fidelity Select Pharmaceuticals Port | 705.58K (1.25%) | -254.80K Decreased by -36.11% | Feb 28, 26 |
| 11 | Vanguard Institutional Extnd Mkt Idx Tr | 702.55K (1.24%) | 7.83K Increased by +1.11% | Apr 30, 26 |
| 12 | Biotech Growth Ord | 618.55K (1.09%) | 0.00 Increased by 0.00% | Oct 31, 23 |
| 13 | Franklin Biotechnology Discovery A | 568.80K (1.01%) | 0.00 Increased by 0.00% | Jul 31, 25 |
| 14 | Strategic Advisers Fidelity US TtlStk | 563.80K (1.00%) | 0.00 Increased by 0.00% | Dec 31, 25 |
| 15 | JPM US Mid Cap Growth-Composite | 563.65K (1.00%) | -5.19K Decreased by -0.92% | Mar 31, 26 |
| 16 | JPMorgan Mid Cap Growth I | 560.64K (0.99%) | -3.01K Decreased by -0.54% | Apr 30, 26 |
| 17 | JPMorgan Growth Advantage A | 555.22K (0.98%) | -8.98K Decreased by -1.62% | Apr 30, 26 |
| 18 | MEDICAL BioHealth EUR Acc | 554.36K (0.98%) | 119.24K Increased by +21.51% | Jun 30, 25 |
| 19 | Fidelity Select Health Care | 540.00K (0.96%) | -130.00K Decreased by -24.07% | Feb 28, 26 |
| 20 | Fidelity Advisor Biotechnology I | 531.70K (0.94%) | -459.90K Decreased by -86.50% | Feb 28, 26 |