| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | EcoR1 Capital Oleg Nodelman | 22,970,388 | $600,445,942 | 29.19% | |
| 2. | Rubric Capital Management David Rosen | 7,000,000 | $182,980,000 | 1.68% | |
| 3. | Perceptive Advisors Joseph Edelman | 4,182,953 | $109,342,391 | +20% | 1.64% |
| 4. | Biotechnology Value Fund / BVF Inc Mark Lampert | 3,649,142 | $95,388,572 | -3% | 2.44% |
| 5. | Citadel Investment Group Ken Griffin | 914,136 | $23,895,516 | -21% | 0% |