| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | RA Capital Management, LLC | 18.20M (24.71%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 2 | Adage Capital Partners Gp LLC | 12.52M (16.99%) | 2.89M Increased by +23.12% | Mar 31, 25 |
| 3 | BlackRock Inc | 9.63M (13.07%) | 268.45K Increased by +2.79% | Mar 31, 25 |
| 4 | Maverick Capital Ltd | 8.26M (11.22%) | 441.00 Increased by +0.01% | Mar 31, 25 |
| 5 | Driehaus Capital Management LLC | 6.36M (8.63%) | -353.85K Decreased by -5.56% | Mar 31, 25 |
| 6 | M28 Capital Management LP | 5.66M (7.69%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 7 | Kynam Capital Management, LP | 4.90M (6.65%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 8 | Artal Group S A | 4.57M (6.20%) | 514.85K Increased by +11.28% | Jun 30, 24 |
| 9 | T. Rowe Price Associates, Inc. | 4.13M (5.60%) | -973.58K Decreased by -23.60% | Mar 31, 25 |
| 10 | Bellevue Group AG | 4.09M (5.56%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 11 | 683 Capital Management LLC | 3.92M (5.33%) | 140.00K Increased by +3.57% | Mar 31, 25 |
| 12 | Siren, L.L.C. | 3.70M (5.02%) | -54.17K Decreased by -1.47% | Mar 31, 25 |
| 13 | Vanguard Group Inc | 3.21M (4.35%) | 23.89K Increased by +0.75% | Mar 31, 25 |
| 14 | Emerald Advisers, LLC | 3.13M (4.25%) | -28.81K Decreased by -0.92% | Mar 31, 25 |
| 15 | Geode Capital Management, LLC | 2.59M (3.52%) | 121.65K Increased by +4.69% | Mar 31, 25 |
| 16 | PRIMECAP Management Company | 2.51M (3.40%) | -12.00K Decreased by -0.48% | Mar 31, 25 |
| 17 | Loomis, Sayles & Company LP | 2.44M (3.31%) | 775.67K Increased by +31.84% | Mar 31, 25 |
| 18 | State Street Corp | 2.42M (3.28%) | -8.63K Decreased by -0.36% | Mar 31, 25 |
| 19 | Artisan Partners Limited Partnership | 2.37M (3.22%) | 463.36K Increased by +19.55% | Mar 31, 25 |
| 20 | FMR Inc | 2.14M (2.91%) | 317.11K Increased by +14.78% | Mar 31, 25 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | BB Biotech AG Ord | 4.09M (5.56%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | iShares Russell 2000 ETF | 2.79M (3.79%) | 19.39K Increased by +0.69% | Jun 30, 25 |
| 3 | PRIMECAP Odyssey Aggressive Growth | 2.44M (3.31%) | -12.00K Decreased by -0.49% | Mar 31, 25 |
| 4 | T. Rowe Price New Horizons | 2.13M (2.89%) | 323.96K Increased by +15.23% | Jun 30, 25 |
| 5 | US Small-Cap Growth II Equity Comp | 2.13M (2.89%) | 513.86K Increased by +24.15% | Jun 30, 25 |
| 6 | Loomis Sayles Small Cap Growth Instl | 1.89M (2.56%) | 327.55K Increased by +17.36% | May 31, 25 |
| 7 | Vanguard Institutional Extnd Mkt Idx Tr | 1.87M (2.53%) | 14.16K Increased by +0.76% | May 31, 25 |
| 8 | Artisan International Small-Mid Investor | 1.51M (2.06%) | -102.46K Decreased by -6.77% | Jun 30, 25 |
| 9 | Artisan Non-U.S. Small-Mid Growth Comp | 1.51M (2.06%) | -102.46K Decreased by -6.77% | Jun 30, 25 |
| 10 | Fidelity Select Biotechnology | 1.44M (1.95%) | 1.11M Increased by +76.84% | Sep 30, 24 |
| 11 | T. Rowe Price Health Sciences | 1.07M (1.46%) | 172.73K Increased by +16.09% | Jun 30, 25 |
| 12 | Polar Capital Biotech S Inc | 1.00M (1.36%) | 0.00 Increased by 0.00% | May 31, 25 |
| 13 | Fidelity Small Cap Index | 979.49K (1.33%) | 13.64K Increased by +1.39% | Apr 30, 25 |
| 14 | Emerald Growth A | 962.90K (1.31%) | 0.00 Increased by 0.00% | May 31, 25 |
| 15 | Fidelity Small Cap Growth | 942.80K (1.28%) | 0.00 Increased by 0.00% | Apr 30, 25 |
| 16 | iShares Russell 2000 Growth ETF | 871.47K (1.18%) | 2.15K Increased by +0.25% | Jun 30, 25 |
| 17 | iShares Biotechnology ETF | 759.89K (1.03%) | -2.74K Decreased by -0.36% | Jun 30, 25 |
| 18 | Principal SmallCap Growth I Instl | 703.63K (0.96%) | -303.00 Decreased by -0.04% | Jun 30, 25 |
| 19 | iShares Russell 2000 Value ETF | 674.60K (0.92%) | 0.00 Increased by 0.00% | Apr 30, 24 |
| 20 | Driehaus Small Cap Growth Institutional | 648.61K (0.88%) | -2.26K Decreased by -0.35% | May 31, 25 |