| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Viking Global Investors LP | 7.15M (92.71%) | 0.00 Increased by 0.00% | Mar 31, 24 |
| 2 | Perceptive Advisors LLC | 4.26M (55.18%) | 0.00 Increased by 0.00% | Mar 31, 24 |
| 3 | BlackRock Inc | 2.75M (35.68%) | 36.03K Increased by +1.31% | Mar 31, 24 |
| 4 | RA Capital Management, LLC | 2.63M (34.10%) | -2.09M Decreased by -79.64% | Mar 31, 24 |
| 5 | State Street Corp | 2.42M (31.34%) | 781.86K Increased by +32.34% | Mar 31, 24 |
| 6 | State Street Corporation | 2.42M (31.34%) | 781.86K Increased by +32.34% | Mar 31, 24 |
| 7 | Woodline Partners LP | 2.32M (30.06%) | 793.66K Increased by +34.23% | Dec 31, 23 |
| 8 | Vanguard Group Inc | 1.86M (24.13%) | -12.85K Decreased by -0.69% | Mar 31, 24 |
| 9 | TCG Crossover Management, LLC | 1.75M (22.69%) | 0.00 Increased by 0.00% | Mar 31, 24 |
| 10 | Vestal Point Capital LP | 1.53M (19.84%) | 1.53M Increased by +100.00% | Dec 31, 23 |
| 11 | FMR Inc | 1.47M (19.06%) | -47.69K Decreased by -3.24% | Dec 31, 23 |
| 12 | Fidelity Management and Research Company | 1.47M (19.06%) | 1.47M Increased by +100.00% | Dec 31, 23 |
| 13 | Sofinnova Ventures | 1.30M (16.89%) | 529.69K Increased by +40.66% | Mar 31, 24 |
| 14 | Loomis, Sayles & Company LP | 1.08M (14.03%) | -34.26K Decreased by -3.17% | Dec 31, 23 |
| 15 | Eckert Corp | 1.05M (13.67%) | 1.05M Increased by +100.00% | Mar 31, 24 |
| 16 | ArrowMark Colorado Holdings, LLC (ArrowMark Partners) | 891.22K (11.55%) | -65.66K Decreased by -7.37% | Mar 31, 24 |
| 17 | Walleye Trading Advisors, LLC | 800.00K (10.37%) | 800.00K Increased by +100.00% | Mar 31, 24 |
| 18 | Bank of America Corp | 741.59K (9.61%) | 48.61K Increased by +6.55% | Mar 31, 24 |
| 19 | Capital Research Global Investors | 712.36K (9.24%) | -509.36K Decreased by -71.50% | Dec 31, 23 |
| 20 | Geode Capital Management, LLC | 704.83K (9.14%) | 17.46K Increased by +2.48% | Mar 31, 24 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | SPDR® S&P Biotech ETF | 1.57M (20.33%) | -46.15K Decreased by -2.94% | Apr 30, 24 |
| 2 | Vanguard Total Stock Mkt Idx Inv | 1.22M (15.77%) | 94.03K Increased by +7.73% | Apr 30, 24 |
| 3 | iShares Russell 2000 ETF | 801.01K (10.39%) | -6.39K Decreased by -0.80% | Apr 30, 24 |
| 4 | Fidelity Growth Compy Commingled Pl O | 660.08K (8.56%) | 6.23K Increased by +0.94% | Dec 31, 23 |
| 5 | American Funds SMALLCAP World A | 641.78K (8.32%) | -438.79K Decreased by -68.37% | Dec 31, 23 |
| 6 | Eventide Healthcare & Life Sciences I | 434.03K (5.63%) | 434.03K Increased by +100.00% | Sep 30, 23 |
| 7 | Vanguard Institutional Extnd Mkt Idx Tr | 394.10K (5.11%) | -76.00 Decreased by -0.02% | Apr 30, 24 |
| 8 | Fidelity® Growth Company | 392.28K (5.09%) | 14.40K Increased by +3.67% | Nov 30, 23 |
| 9 | Fidelity Growth Company Fund | 391.25K (5.07%) | -1.03K Decreased by -0.26% | Dec 31, 23 |
| 10 | Fidelity Small Cap Index | 350.40K (4.54%) | 3.42K Increased by +0.98% | Feb 29, 24 |
| 11 | Fidelity® Small Cap Index | 329.18K (4.27%) | 8.93K Increased by +2.71% | Oct 31, 23 |
| 12 | iShares Biotechnology ETF | 263.28K (3.41%) | -720.00 Decreased by -0.27% | Apr 30, 24 |
| 13 | State St Russell Sm/Mid Cp® Indx NL Cl C | 209.94K (2.72%) | 0.00 Increased by 0.00% | Apr 30, 24 |
| 14 | The Merger Fund A | 198.51K (2.57%) | 198.51K Increased by +100.00% | Mar 31, 24 |
| 15 | Loomis Sayles Small Cap Growth Instl | 197.14K (2.56%) | -139.90K Decreased by -70.96% | Feb 29, 24 |
| 16 | iShares Russell 2000 Growth ETF | 190.81K (2.47%) | -456.00 Decreased by -0.24% | Apr 30, 24 |
| 17 | Loomis Sayles Small Cap Growth CIT D | 166.26K (2.16%) | -3.59K Decreased by -2.16% | Dec 31, 23 |
| 18 | Fidelity® Growth Company K6 | 160.84K (2.09%) | -17.46K Decreased by -10.86% | Nov 30, 23 |
| 19 | Schroder Global Healthcare A Acc | 159.03K (2.06%) | -34.36K Decreased by -21.60% | Sep 30, 23 |
| 20 | Direxion Daily S&P Biotech Bull 3X ETF | 157.79K (2.05%) | 1.11K Increased by +0.71% | Apr 30, 24 |