| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | 70,000,000 | $209,440,280 | 2.47% | ||
| 2. | Biotechnology Value Fund / BVF Inc Mark Lampert | 1,584,727 | $146,397,080 | +6% | 4.66% |
| 3. | Tang Capital Management Kevin C. Tang | 1,236,027 | $114,184,174 | 5.8% | |
| 4. | Citadel Investment Group Ken Griffin | 1,052,048 | $97,188,194 | +26% | 0.02% |
| 5. | Rock Springs Capital Management Kris Jenner, Gordon Bussard, Graham Mcphail | 811,294 | $74,947,340 | +7% | 4.42% |