| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | EcoR1 Capital Oleg Nodelman | 22,970,388 | $575,178,516 | 24.41% | |
| 2. | Rubric Capital Management David Rosen | 7,000,000 | $175,280,000 | +22% | 1.86% |
| 3. | Biotechnology Value Fund / BVF Inc Mark Lampert | 3,734,142 | $93,502,916 | -6% | 2.98% |
| 4. | Perceptive Advisors Joseph Edelman | 3,510,078 | $87,892,353 | +8% | 1.72% |
| 5. | Citadel Investment Group Ken Griffin | 1,150,018 | $28,796,451 | +351% | 0% |