| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | VenBio Select Advisor Kurt Von Emster | 11,430,455 | $454,017,673 | -22% | 4.47% |
| 2. | Adage Capital Management Phill Gross And Robert Atchinson | 8,925,010 | $354,501,397 | -21% | 0.55% |
| 3. | Pentwater Capital Management Matthew Halbower | 8,170,000 | $324,512,400 | 1.68% | |
| 4. | EcoR1 Capital Oleg Nodelman | 6,000,000 | $238,320,000 | +93% | 10.11% |
| 5. | Perceptive Advisors Joseph Edelman | 5,258,903 | $208,883,627 | +81% | 4.08% |