| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | RA Capital Management, LLC | 18.20M (27.84%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 2 | Adage Capital Partners Gp LLC | 12.52M (19.15%) | 2.89M Increased by +23.12% | Mar 31, 25 |
| 3 | BlackRock Inc | 9.63M (14.73%) | 268.45K Increased by +2.79% | Mar 31, 25 |
| 4 | Maverick Capital Ltd | 8.26M (12.64%) | 441.00 Increased by +0.01% | Mar 31, 25 |
| 5 | Driehaus Capital Management LLC | 6.36M (9.73%) | -353.85K Decreased by -5.56% | Mar 31, 25 |
| 6 | M28 Capital Management LP | 5.66M (8.66%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 7 | T. Rowe Price Associates, Inc. | 5.19M (7.94%) | 1.07M Increased by +20.52% | Jun 30, 25 |
| 8 | Artal Group S A | 4.57M (6.98%) | 514.85K Increased by +11.28% | Jun 30, 24 |
| 9 | Kynam Capital Management, LP | 4.56M (6.98%) | -339.44K Decreased by -7.44% | Jun 30, 25 |
| 10 | Bellevue Group AG | 4.09M (6.26%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 11 | 683 Capital Management LLC | 3.92M (6.00%) | 140.00K Increased by +3.57% | Mar 31, 25 |
| 12 | Siren, L.L.C. | 3.70M (5.65%) | -54.17K Decreased by -1.47% | Mar 31, 25 |
| 13 | Vanguard Group Inc | 3.48M (5.32%) | 270.67K Increased by +7.78% | Jun 30, 25 |
| 14 | Loomis, Sayles & Company LP | 3.30M (5.04%) | 859.16K Increased by +26.07% | Jun 30, 25 |
| 15 | Emerald Advisers, LLC | 3.26M (4.98%) | 123.56K Increased by +3.79% | Jun 30, 25 |
| 16 | Geode Capital Management, LLC | 2.59M (3.97%) | 121.65K Increased by +4.69% | Mar 31, 25 |
| 17 | PRIMECAP Management Company | 2.47M (3.77%) | -41.67K Decreased by -1.69% | Jun 30, 25 |
| 18 | State Street Corp | 2.42M (3.70%) | -8.63K Decreased by -0.36% | Mar 31, 25 |
| 19 | Artisan Partners Limited Partnership | 2.26M (3.46%) | -105.32K Decreased by -4.65% | Jun 30, 25 |
| 20 | FMR Inc | 2.14M (3.28%) | 317.11K Increased by +14.78% | Mar 31, 25 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | BB Biotech AG Ord | 4.09M (6.26%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | iShares Russell 2000 ETF | 2.64M (4.04%) | -50.19K Decreased by -1.90% | Jul 31, 25 |
| 3 | PRIMECAP Odyssey Aggressive Growth | 2.39M (3.66%) | -46.94K Decreased by -1.96% | Jun 30, 25 |
| 4 | T. Rowe Price New Horizons | 2.13M (3.25%) | 323.96K Increased by +15.23% | Jun 30, 25 |
| 5 | US Small-Cap Growth II Equity Comp | 2.13M (3.25%) | 513.86K Increased by +24.15% | Jun 30, 25 |
| 6 | Loomis Sayles Small Cap Growth Instl | 1.85M (2.84%) | -32.63K Decreased by -1.76% | Jun 30, 25 |
| 7 | Artisan International Small-Mid Investor | 1.51M (2.32%) | -102.46K Decreased by -6.77% | Jun 30, 25 |
| 8 | Artisan Non-U.S. Small-Mid Growth Comp | 1.51M (2.32%) | -102.46K Decreased by -6.77% | Jun 30, 25 |
| 9 | Fidelity Select Biotechnology | 1.44M (2.20%) | 1.11M Increased by +76.84% | Sep 30, 24 |
| 10 | Vanguard Institutional Extnd Mkt Idx Tr | 1.28M (1.96%) | -575.53K Decreased by -44.84% | Jul 31, 25 |
| 11 | T. Rowe Price Health Sciences | 1.07M (1.64%) | 172.73K Increased by +16.09% | Jun 30, 25 |
| 12 | Polar Capital Biotech S Inc | 1.00M (1.53%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 13 | Fidelity Small Cap Index | 979.61K (1.50%) | 121.00 Increased by +0.01% | May 31, 25 |
| 14 | Emerald Growth A | 962.90K (1.47%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 15 | Fidelity Small Cap Growth | 942.80K (1.44%) | 0.00 Increased by 0.00% | Apr 30, 25 |
| 16 | iShares Russell 2000 Growth ETF | 879.02K (1.34%) | 0.00 Increased by 0.00% | Jul 31, 25 |
| 17 | iShares Biotechnology ETF | 759.01K (1.16%) | 6.49K Increased by +0.85% | Jul 31, 25 |
| 18 | Principal SmallCap Growth I Instl | 703.63K (1.08%) | -303.00 Decreased by -0.04% | Jun 30, 25 |
| 19 | iShares Russell 2000 Value ETF | 674.60K (1.03%) | 0.00 Increased by 0.00% | Apr 30, 24 |
| 20 | Driehaus Small Cap Growth Institutional | 648.61K (0.99%) | -2.26K Decreased by -0.35% | May 31, 25 |