| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | RTW INVESTMENTS, LLC | 17.69M (27.10%) | 0.00 Increased by 0.00% | Sep 30, 23 |
| 2 | Wellington Management Company LLP | 8.02M (12.29%) | 2.88M Increased by +35.90% | Sep 30, 23 |
| 3 | Maverick Capital Ltd | 5.63M (8.63%) | 1.25M Increased by +22.20% | Sep 30, 23 |
| 4 | BlackRock Inc | 5.11M (7.84%) | -22.18K Decreased by -0.43% | Sep 30, 23 |
| 5 | Vanguard Group Inc | 4.60M (7.05%) | 4.08K Increased by +0.09% | Sep 30, 23 |
| 6 | Westfield Capital Management Company, LP | 4.19M (6.43%) | 538.21K Increased by +12.83% | Sep 30, 23 |
| 7 | State Street Corporation | 3.14M (4.81%) | -39.02K Decreased by -1.24% | Sep 30, 23 |
| 8 | Citadel Advisors Llc | 2.68M (4.10%) | 90.39K Increased by +3.37% | Sep 30, 23 |
| 9 | T. Rowe Price Associates, Inc. | 2.64M (4.04%) | 519.14K Increased by +19.68% | Sep 30, 23 |
| 10 | Logos Global Management LP | 1.98M (3.03%) | 1.73M Increased by +87.34% | Sep 30, 23 |
| 11 | Avidity Partners Management LP | 1.59M (2.43%) | 261.43K Increased by +16.47% | Sep 30, 23 |
| 12 | Perceptive Advisors LLC | 1.52M (2.33%) | 349.10K Increased by +23.01% | Sep 30, 23 |
| 13 | Boxer Capital LLC | 1.47M (2.25%) | 0.00 Increased by 0.00% | Sep 30, 23 |
| 14 | Dimensional Fund Advisors, Inc. | 1.34M (2.05%) | -2.49K Decreased by -0.19% | Sep 30, 23 |
| 15 | venBio Select Advisor LLC | 1.25M (1.92%) | 1.25M Increased by +100.00% | Sep 30, 23 |
| 16 | Geode Capital Management, LLC | 1.24M (1.90%) | 56.06K Increased by +4.52% | Sep 30, 23 |
| 17 | BAMCO Inc | 1.11M (1.70%) | 225.23K Increased by +20.33% | Sep 30, 23 |
| 18 | COWEN AND COMPANY, LLC | 1.10M (1.69%) | 0.00 Increased by 0.00% | Sep 30, 23 |
| 19 | Millennium Management LLC | 1.01M (1.54%) | 826.59K Increased by +82.18% | Sep 30, 23 |
| 20 | Novo A/S | 1.00M (1.53%) | 81.00K Increased by +8.09% | Sep 30, 23 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Vanguard Health Care Inv | 4.09M (6.27%) | 1.52M Increased by +37.17% | Sep 30, 23 |
| 2 | Vanguard Total Stock Mkt Idx Inv | 1.89M (2.89%) | 3.81K Increased by +0.20% | Nov 30, 23 |
| 3 | SPDR® S&P Biotech ETF | 1.85M (2.83%) | -10.71K Decreased by -0.58% | Dec 31, 23 |
| 4 | iShares Russell 2000 ETF | 1.68M (2.58%) | 10.71K Increased by +0.64% | Dec 29, 23 |
| 5 | Harbor Small Cap Growth Instl | 925.22K (1.42%) | 109.38K Increased by +11.82% | Oct 31, 23 |
| 6 | Eventide Healthcare & Life Sciences I | 898.00K (1.38%) | 0.00 Increased by 0.00% | Sep 30, 23 |
| 7 | T. Rowe Price Health Sciences | 892.25K (1.37%) | 252.74K Increased by +28.33% | Sep 30, 23 |
| 8 | Vanguard Institutional Extnd Mkt Idx Tr | 872.16K (1.34%) | 27.09K Increased by +3.11% | Nov 30, 23 |
| 9 | T. Rowe Price New Horizons | 856.75K (1.31%) | 154.25K Increased by +18.00% | Sep 30, 23 |
| 10 | Putnam Global Health Care A | 797.60K (1.22%) | 62.00K Increased by +7.77% | Dec 31, 23 |
| 11 | Vanguard Small Cap Index | 778.44K (1.19%) | 2.41K Increased by +0.31% | Nov 30, 23 |
| 12 | Westfield Capital Mgt Co Sm-Cap Gr Eq | 770.87K (1.18%) | -44.96K Decreased by -5.83% | Dec 31, 23 |
| 13 | Baron High Growth Strategy | 748.27K (1.15%) | -51.00K Decreased by -6.82% | Dec 31, 23 |
| 14 | Baron Opportunity Retail | 748.27K (1.15%) | -51.00K Decreased by -6.82% | Dec 31, 23 |
| 15 | US Small-Cap Growth II Equity Comp | 702.49K (1.08%) | 702.49K Increased by +100.00% | Jun 30, 23 |
| 16 | JPM Thematics Genetic Thrps C2 Acc USD | 645.18K (0.99%) | -28.66K Decreased by -4.44% | Dec 31, 23 |
| 17 | HBM Healthcare Investments AG Ord | 625.00K (0.96%) | -25.79K Decreased by -4.13% | Sep 30, 23 |
| 18 | iShares Biotechnology ETF | 610.02K (0.93%) | -556.00 Decreased by -0.09% | Dec 29, 23 |
| 19 | Fidelity® Small Cap Index | 539.73K (0.83%) | 14.09K Increased by +2.61% | Oct 31, 23 |
| 20 | Westfield Small / Mid Cap Gr Eq CIT C | 502.20K (0.77%) | 30.85K Increased by +6.14% | Nov 30, 23 |