| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | Biotechnology Value Fund / BVF Inc Mark Lampert | 1,355,257 | $24,611,467 | +1% | 0.83% |
| 2. | Nantahala Capital Management Wilmot B. Harkey And Daniel Mack | 1,235,000 | $22,427,600 | 0.74% | |
| 3. | OrbiMed Advisors Samuel Isaly | 1,187,300 | $21,561,368 | -13% | 0.44% |
| 4. | Caligan Partners David Johnson | 881,533 | $16,008,639 | +6% | 1.32% |
| 5. | RA Capital Management Peter Kolchinsky | 662,968 | $12,039,499 | 0.12% |