| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| RANDAL J. KIRK | 39% | 146,295,359 | 146,295,359 | 0 | /s/ Randal J. Kirk | Randal J. Kirk | 0001091823 |
| R.J. KIRK DECLARATION OF TRUST | 27% | 98,831,434 | 98,831,434 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Trustee | |
| SUNSET 2020 LLC | 4.4% | 16,406,828 | 16,406,828 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Manager | |
| THIRD SECURITY, LLC | 7.4% | 27,454,284 | 27,454,284 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Managing Member |