| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | RA Capital Management, LLC | 18.20M (25.96%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | Adage Capital Partners Gp LLC | 9.62M (13.72%) | -81.25K Decreased by -0.84% | Dec 31, 24 |
| 3 | BlackRock Inc | 9.36M (13.35%) | 2.06M Increased by +22.03% | Dec 31, 24 |
| 4 | Maverick Capital Ltd | 8.26M (11.78%) | -1.79M Decreased by -21.62% | Dec 31, 24 |
| 5 | Driehaus Capital Management LLC | 6.71M (9.57%) | 853.59K Increased by +12.72% | Dec 31, 24 |
| 6 | M28 Capital Management LP | 5.66M (8.08%) | -500.00K Decreased by -8.83% | Dec 31, 24 |
| 7 | T. Rowe Price Associates, Inc. | 5.10M (7.27%) | 1.97M Increased by +38.68% | Dec 31, 24 |
| 8 | Kynam Capital Management, LP | 4.90M (6.99%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 9 | Artal Group S A | 4.57M (6.51%) | 514.85K Increased by +11.28% | Jun 30, 24 |
| 10 | Bellevue Group AG | 4.09M (5.84%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 11 | 683 Capital Management LLC | 3.79M (5.40%) | -415.00K Decreased by -10.96% | Dec 31, 24 |
| 12 | Siren, L.L.C. | 3.75M (5.35%) | -1.97M Decreased by -52.54% | Dec 31, 24 |
| 13 | Vanguard Group Inc | 3.18M (4.54%) | 294.96K Increased by +9.27% | Dec 31, 24 |
| 14 | Emerald Advisers, LLC | 3.16M (4.51%) | 280.86K Increased by +8.88% | Dec 31, 24 |
| 15 | PRIMECAP Management Company | 2.52M (3.59%) | -61.18K Decreased by -2.43% | Dec 31, 24 |
| 16 | Geode Capital Management, LLC | 2.47M (3.52%) | 201.09K Increased by +8.14% | Dec 31, 24 |
| 17 | State Street Corp | 2.43M (3.46%) | 105.35K Increased by +4.34% | Dec 31, 24 |
| 18 | Point72 Asset Management, L.P. | 1.97M (2.82%) | 1.97M Increased by +100.00% | Mar 31, 24 |
| 19 | Emerald Mutual Fund Advisers Trust | 1.93M (2.75%) | -192.43K Decreased by -9.97% | Dec 31, 24 |
| 20 | Artisan Partners Limited Partnership | 1.91M (2.72%) | -53.68K Decreased by -2.82% | Dec 31, 24 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | BB Biotech AG Ord | 4.09M (5.84%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | iShares Russell 2000 ETF | 2.53M (3.61%) | -21.89K Decreased by -0.87% | Mar 31, 25 |
| 3 | PRIMECAP Odyssey Aggressive Growth | 2.45M (3.50%) | -72.38K Decreased by -2.95% | Dec 31, 24 |
| 4 | Vanguard Institutional Extnd Mkt Idx Tr | 1.80M (2.57%) | 2.70K Increased by +0.15% | Feb 28, 25 |
| 5 | US Small-Cap Growth II Equity Comp | 1.64M (2.33%) | 834.58K Increased by +51.02% | Dec 31, 24 |
| 6 | T. Rowe Price New Horizons | 1.64M (2.33%) | 0.00 Increased by 0.00% | Feb 28, 25 |
| 7 | Fidelity Select Biotechnology | 1.44M (2.05%) | 1.11M Increased by +76.84% | Sep 30, 24 |
| 8 | Loomis Sayles Small Cap Growth Instl | 1.42M (2.02%) | 247.21K Increased by +17.45% | Feb 28, 25 |
| 9 | Artisan International Small-Mid Investor | 1.27M (1.81%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 10 | Artisan Non-U.S. Small-Mid Growth Comp | 1.27M (1.81%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 11 | T. Rowe Price Health Sciences | 1.21M (1.72%) | -120.90K Decreased by -10.01% | Feb 28, 25 |
| 12 | Polar Capital Biotech S Inc | 1.00M (1.43%) | 0.00 Increased by 0.00% | Feb 28, 25 |
| 13 | Emerald Growth A | 962.90K (1.37%) | 0.00 Increased by 0.00% | Feb 28, 25 |
| 14 | Fidelity Small Cap Growth | 942.80K (1.34%) | 0.00 Increased by 0.00% | Jan 31, 25 |
| 15 | Fidelity Small Cap Index | 909.50K (1.30%) | -17.03K Decreased by -1.87% | Jan 31, 25 |
| 16 | iShares Biotechnology ETF | 780.21K (1.11%) | -8.69K Decreased by -1.11% | Mar 31, 25 |
| 17 | iShares Russell 2000 Growth ETF | 725.74K (1.03%) | -3.45K Decreased by -0.48% | Mar 31, 25 |
| 18 | Principal SmallCap Growth I Instl | 704.28K (1.00%) | -496.00 Decreased by -0.07% | Feb 28, 25 |
| 19 | iShares Russell 2000 Value ETF | 674.60K (0.96%) | 0.00 Increased by 0.00% | Apr 30, 24 |
| 20 | Heptagon Driehaus US Micro Cap Eq C$ Acc | 672.28K (0.96%) | -87.76K Decreased by -13.05% | Feb 28, 25 |