| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| WuXi PharmaTech Healthcare Fund I L.P. | 8.5% | 4.98M | 0 | 4.98M | /s/ Edward Hu | Edward Hu, Director | |
| WuXi AppTec Co., Ltd. | 8.5% | 4.98M | 0 | 4.98M | /s/ Edward Hu | Edward Hu, Director |