| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| RANDAL J. KIRK | 40% | 116,844,357 | 116,844,357 | 0 | /s/ Randal J. Kirk | Randal J. Kirk | 0001091823 |
| R.J. KIRK DECLARATION OF TRUST | 22% | 64,547,214 | 64,547,214 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Trustee | |
| SUNSET 2020 LLC | 5.6% | 16,406,828 | 16,406,828 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Manager | |
| THIRD SECURITY, LLC | 11% | 32,454,536 | 32,454,536 | 0 | /s/ Randal J. Kirk | Randal J. Kirk Manager |