| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | RA Capital Management, LLC | 18.20M (26.92%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | Adage Capital Partners Gp LLC | 12.52M (18.51%) | 2.89M Increased by +23.12% | Mar 31, 25 |
| 3 | BlackRock Inc | 9.63M (14.24%) | 268.45K Increased by +2.79% | Mar 31, 25 |
| 4 | Maverick Capital Ltd | 8.26M (12.22%) | 441.00 Increased by +0.01% | Mar 31, 25 |
| 5 | Driehaus Capital Management LLC | 6.36M (9.40%) | -353.85K Decreased by -5.56% | Mar 31, 25 |
| 6 | M28 Capital Management LP | 5.66M (8.38%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 7 | Kynam Capital Management, LP | 4.90M (7.25%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 8 | Artal Group S A | 4.57M (6.75%) | 514.85K Increased by +11.28% | Jun 30, 24 |
| 9 | T. Rowe Price Associates, Inc. | 4.13M (6.10%) | -973.58K Decreased by -23.60% | Mar 31, 25 |
| 10 | Bellevue Group AG | 4.09M (6.06%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 11 | 683 Capital Management LLC | 3.92M (5.80%) | 140.00K Increased by +3.57% | Mar 31, 25 |
| 12 | Siren, L.L.C. | 3.70M (5.47%) | -54.17K Decreased by -1.47% | Mar 31, 25 |
| 13 | Vanguard Group Inc | 3.21M (4.74%) | 23.89K Increased by +0.75% | Mar 31, 25 |
| 14 | Emerald Advisers, LLC | 3.13M (4.63%) | -28.81K Decreased by -0.92% | Mar 31, 25 |
| 15 | Geode Capital Management, LLC | 2.59M (3.83%) | 121.65K Increased by +4.69% | Mar 31, 25 |
| 16 | PRIMECAP Management Company | 2.51M (3.71%) | -12.00K Decreased by -0.48% | Mar 31, 25 |
| 17 | Loomis, Sayles & Company LP | 2.44M (3.60%) | 775.67K Increased by +31.84% | Mar 31, 25 |
| 18 | State Street Corp | 2.42M (3.58%) | -8.63K Decreased by -0.36% | Mar 31, 25 |
| 19 | Artisan Partners Limited Partnership | 2.37M (3.51%) | 463.36K Increased by +19.55% | Mar 31, 25 |
| 20 | FMR Inc | 2.14M (3.17%) | 317.11K Increased by +14.78% | Mar 31, 25 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | BB Biotech AG Ord | 4.09M (6.06%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | PRIMECAP Odyssey Aggressive Growth | 2.44M (3.61%) | -12.00K Decreased by -0.49% | Mar 31, 25 |
| 3 | iShares Russell 2000 ETF | 2.40M (3.55%) | 405.00 Increased by +0.02% | Apr 30, 25 |
| 4 | Vanguard Institutional Extnd Mkt Idx Tr | 1.85M (2.74%) | 2.75K Increased by +0.15% | Apr 30, 25 |
| 5 | Artisan International Small-Mid Investor | 1.62M (2.39%) | 346.41K Increased by +21.42% | Mar 31, 25 |
| 6 | Artisan Non-U.S. Small-Mid Growth Comp | 1.62M (2.39%) | 346.41K Increased by +21.42% | Mar 31, 25 |
| 7 | T. Rowe Price New Horizons | 1.61M (2.39%) | -21.82K Decreased by -1.35% | Mar 31, 25 |
| 8 | US Small-Cap Growth II Equity Comp | 1.61M (2.39%) | -22.30K Decreased by -1.38% | Mar 31, 25 |
| 9 | Fidelity Select Biotechnology | 1.44M (2.13%) | 1.11M Increased by +76.84% | Sep 30, 24 |
| 10 | Loomis Sayles Small Cap Growth Instl | 1.42M (2.10%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 11 | Polar Capital Biotech S Inc | 1.00M (1.48%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 12 | Emerald Growth A | 962.90K (1.42%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 13 | Fidelity Small Cap Growth | 942.80K (1.39%) | 0.00 Increased by 0.00% | Feb 28, 25 |
| 14 | T. Rowe Price Health Sciences | 926.13K (1.37%) | -281.87K Decreased by -30.44% | Mar 31, 25 |
| 15 | Fidelity Small Cap Index | 915.20K (1.35%) | 5.69K Increased by +0.62% | Feb 28, 25 |
| 16 | iShares Biotechnology ETF | 769.25K (1.14%) | 1.76K Increased by +0.23% | Apr 30, 25 |
| 17 | iShares Russell 2000 Growth ETF | 728.33K (1.08%) | 0.00 Increased by 0.00% | Apr 30, 25 |
| 18 | Principal SmallCap Growth I Instl | 704.86K (1.04%) | 1.69K Increased by +0.24% | Apr 30, 25 |
| 19 | iShares Russell 2000 Value ETF | 674.60K (1.00%) | 0.00 Increased by 0.00% | Apr 30, 24 |
| 20 | Fidelity Extended Market Index | 650.81K (0.96%) | 13.35K Increased by +2.05% | Mar 31, 25 |