| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Vanguard Group Inc | 7.23M (12.96%) | -1.33M Decreased by -18.42% | Dec 31, 25 |
| 2 | BlackRock Inc | 6.80M (12.18%) | -524.92K Decreased by -7.72% | Mar 31, 26 |
| 3 | EcoR1 Capital, LLC | 6.73M (12.05%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 4 | Logos Global Management LP | 5.58M (9.99%) | 2.27M Increased by +40.81% | Sep 30, 25 |
| 5 | Vanguard Portfolio Management, LLC | 3.89M (6.97%) | 3.89M Increased by +100.00% | Mar 31, 26 |
| 6 | D. E. Shaw & Co LP | 3.64M (6.52%) | -50.63K Decreased by -1.39% | Mar 31, 26 |
| 7 | Pfizer Inc | 3.46M (6.20%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 8 | RTW INVESTMENTS, LLC | 3.33M (5.97%) | 0.00 Increased by 0.00% | Mar 31, 25 |
| 9 | Vanguard Capital Management, LLC | 2.69M (4.82%) | 2.69M Increased by +100.00% | Mar 31, 26 |
| 10 | Bellevue Group AG | 2.39M (4.28%) | 3.00K Increased by +0.13% | Dec 31, 24 |
| 11 | TCG Crossover Management, LLC | 2.39M (4.28%) | -278.75K Decreased by -11.68% | Mar 31, 26 |
| 12 | Paradigm Biocapital Advisors LP | 2.34M (4.19%) | -98.19K Decreased by -4.20% | Sep 30, 24 |
| 13 | Point72 Asset Management, L.P. | 2.32M (4.15%) | 2.32M Increased by +100.00% | Dec 31, 25 |
| 14 | T. Rowe Price Investment Management,Inc. | 2.21M (3.96%) | 2.21M Increased by +100.00% | Dec 31, 24 |
| 15 | Armistice Capital, LLC | 1.98M (3.54%) | 178.00K Increased by +9.00% | Mar 31, 26 |
| 16 | JPMorgan Chase & Co | 1.86M (3.33%) | -2.80M Decreased by -150.86% | Dec 31, 24 |
| 17 | Two Sigma Investments LLC | 1.83M (3.28%) | 839.65K Increased by +45.83% | Mar 31, 26 |
| 18 | State Street Corp | 1.83M (3.28%) | -14.94K Decreased by -0.82% | Mar 31, 26 |
| 19 | Alyeska Investment Group, L.P. | 1.80M (3.23%) | 1.80M Increased by +100.00% | Mar 31, 25 |
| 20 | ArrowMark Colorado Holdings, LLC (ArrowMark Partners) | 1.78M (3.18%) | 532.11K Increased by +29.95% | Dec 31, 24 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | BB Biotech AG Ord | 2.38M (4.26%) | 0.00 Increased by 0.00% | Dec 31, 24 |
| 2 | Vanguard US Total Market Shares ETF | 1.93M (3.47%) | 2.43K Increased by +0.13% | Sep 30, 24 |
| 3 | Vanguard Total Stock Mkt Idx Inv | 1.92M (3.44%) | 0.00 Increased by 0.00% | Jun 30, 26 |
| 4 | Vanguard Strategic Equity Inv | 1.62M (2.90%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 5 | iShares Russell 2000 ETF | 1.56M (2.79%) | 9.27K Increased by +0.59% | Jun 30, 26 |
| 6 | Vanguard Explorer Inv | 896.37K (1.61%) | -125.05K Decreased by -13.95% | Mar 31, 26 |
| 7 | Vanguard Small Cap Index | 841.18K (1.51%) | -5.64K Decreased by -0.67% | Jul 31, 25 |
| 8 | JPMorgan Small Cap Growth A | 755.08K (1.35%) | -8.49K Decreased by -1.12% | Feb 28, 25 |
| 9 | Vanguard Institutional Extnd Mkt Idx Tr | 727.13K (1.30%) | 2.79K Increased by +0.38% | Jun 30, 26 |
| 10 | US Small-Cap Growth II Equity Comp | 715.98K (1.28%) | -1.17M Decreased by -163.57% | Jun 30, 25 |
| 11 | T. Rowe Price Small-Cap Stock | 702.69K (1.26%) | 94.70K Increased by +13.48% | Feb 28, 25 |
| 12 | State Street® SPDR® S&P® PhrmctlsETF | 642.93K (1.15%) | 34.90K Increased by +5.43% | Jun 30, 26 |
| 13 | Nuveen Quant Small Cap Equity R6 | 612.20K (1.10%) | 214.50K Increased by +35.04% | May 31, 26 |
| 14 | FIAM Small Cap Core Composite | 601.40K (1.08%) | -165.20K Decreased by -27.47% | Dec 31, 24 |
| 15 | FIAM Small Cap Core CIT Cl B | 587.40K (1.05%) | -14.00K Decreased by -2.38% | Feb 28, 25 |
| 16 | iShares Russell 2000 Growth ETF | 555.88K (1.00%) | 0.00 Increased by 0.00% | May 31, 25 |
| 17 | Fidelity Small Cap Index | 550.58K (0.99%) | 4.42K Increased by +0.80% | Apr 30, 26 |
| 18 | BlackRock Advantage Small Cap Core Instl | 529.73K (0.95%) | 0.00 Increased by 0.00% | May 31, 26 |
| 19 | T. Rowe Price New Horizons Tr-A | 525.56K (0.94%) | 757.00 Increased by +0.14% | Mar 31, 25 |
| 20 | T. Rowe Price New Horizons Tr-Z | 525.56K (0.94%) | 757.00 Increased by +0.14% | Mar 31, 25 |