| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| RANDAL J. KIRK | 39.4% | 146M | 146M | 0 | /s/ Randal J. Kirk | Randal J. Kirk | 0001091823 |
| R.J. KIRK DECLARATION OF TRUST | 26.6% | 98.8M | 98.8M | 0 | /s/ Randal J. Kirk | Randal J. Kirk Trustee | |
| SUNSET 2020 LLC | 4.4% | 16.4M | 16.4M | 0 | /s/ Randal J. Kirk | Randal J. Kirk Manager | |
| THIRD SECURITY, LLC | 7.4% | 27.5M | 27.5M | 0 | /s/ Randal J. Kirk | Randal J. Kirk Managing Member |