| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Suvretta Capital Management, LLC | 8.30M (11.02%) | 468.69K Increased by +5.65% | Mar 31, 26 |
| 2 | Cormorant Asset Management, LLC | 8.27M (10.98%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 3 | BlackRock Inc | 6.79M (9.02%) | 1.82M Increased by +26.86% | Dec 31, 25 |
| 4 | Federated Hermes Inc | 6.02M (7.99%) | 1.60M Increased by +26.61% | Dec 31, 25 |
| 5 | Franklin Resources Inc | 5.05M (6.71%) | 71.68K Increased by +1.42% | Mar 31, 26 |
| 6 | Vanguard Group Inc | 4.82M (6.41%) | 1.03M Increased by +21.31% | Dec 31, 25 |
| 7 | Adage Capital Partners Gp LLC | 4.70M (6.24%) | -859.78K Decreased by -18.29% | Dec 31, 25 |
| 8 | TCG Crossover Management, LLC | 3.57M (4.75%) | 0.00 Increased by 0.00% | Dec 31, 25 |
| 9 | RA Capital Management, LLC | 3.18M (4.23%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 10 | Paradigm Biocapital Advisors LP | 3.14M (4.17%) | -549.04K Decreased by -17.47% | Mar 31, 26 |
| 11 | HHG PLC | 2.94M (3.90%) | 2.94M Increased by +100.00% | Dec 31, 25 |
| 12 | COMMODORE CAPITAL LP | 2.83M (3.75%) | 2.83M Increased by +100.00% | Mar 31, 26 |
| 13 | Orbimed Advisors, LLC | 2.47M (3.28%) | 672.31K Increased by +27.24% | Dec 31, 25 |
| 14 | Citadel Advisors Llc | 2.14M (2.84%) | -208.82K Decreased by -9.78% | Sep 30, 25 |
| 15 | Millennium Management LLC | 2.05M (2.72%) | 917.80K Increased by +44.85% | Mar 31, 24 |
| 16 | Geode Capital Management, LLC | 1.90M (2.52%) | 374.84K Increased by +19.74% | Dec 31, 25 |
| 17 | State Street Corp | 1.83M (2.44%) | 361.65K Increased by +19.71% | Dec 31, 25 |
| 18 | Aberdeen Group PLC | 1.74M (2.31%) | 132.39K Increased by +7.62% | Mar 31, 26 |
| 19 | Perceptive Advisors LLC | 1.54M (2.04%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 20 | Parkman Healthcare Partners LLC | 1.35M (1.80%) | 266.77K Increased by +19.69% | Mar 31, 26 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Federated Hermes Kaufmann Growth | 2.77M (3.68%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 2 | Federated Hermes Kaufmann R | 2.77M (3.68%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 3 | Vanguard Total Stock Mkt Idx Inv | 2.60M (3.45%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 4 | Federated Hermes Kaufmann Small Cap A | 1.98M (2.63%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 5 | Federated Hermes Kaufmann Small Cap Grow | 1.98M (2.63%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 6 | Franklin Biotechnology Discv A(acc)USD | 1.92M (2.55%) | -194.25K Decreased by -10.13% | Apr 30, 26 |
| 7 | iShares Russell 2000 ETF | 1.82M (2.41%) | 15.32K Increased by +0.84% | Apr 30, 26 |
| 8 | Vanguard US Total Market Shares ETF | 1.56M (2.07%) | 0.00 Increased by 0.00% | Sep 30, 24 |
| 9 | Franklin Small Cap Growth Adv | 1.44M (1.92%) | 85.74K Increased by +5.94% | Mar 31, 26 |
| 10 | Franklin Small Cap Growth SMA | 1.44M (1.92%) | 1.44M Increased by +99.99% | Mar 31, 26 |
| 11 | Franklin US Small Cap Growth Equity | 1.44M (1.92%) | 160.91K Increased by +11.15% | Mar 31, 26 |
| 12 | Franklin Biotechnology Discovery A | 1.23M (1.63%) | -41.81K Decreased by -3.41% | Mar 31, 26 |
| 13 | abrdn Healthcare Investors | 1.12M (1.49%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 14 | T. Rowe Price New Horizons | 900.54K (1.20%) | -248.79K Decreased by -27.63% | Mar 31, 25 |
| 15 | US Small-Cap Growth II Equity Comp | 900.54K (1.20%) | -249.12K Decreased by -27.66% | Mar 31, 25 |
| 16 | Vanguard Institutional Extnd Mkt Idx Tr | 871.13K (1.16%) | 19.10K Increased by +2.19% | Mar 31, 26 |
| 17 | HSBC GIF Glb Eq Sust Hlthcare AC USD | 833.46K (1.11%) | 20.67K Increased by +2.48% | Feb 28, 26 |
| 18 | Fidelity Small Cap Index | 739.58K (0.98%) | 8.41K Increased by +1.14% | Feb 28, 26 |
| 19 | Columbia Small Cap Growth | 693.23K (0.92%) | 251.24K Increased by +36.24% | Jun 30, 24 |
| 20 | Biotech Growth Ord | 680.16K (0.90%) | -94.15K Decreased by -13.84% | Jan 31, 26 |