| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT, LLC | 7.9% | 2.42M | 0 | 2.42M | Kevin Tang | Manager | |
| KEVIN TANG | 7.9% | 2.42M | 0 | 2.42M | Kevin Tang | Self | |
| TANG CAPITAL PARTNERS, LP | 5.2% | 1.58M | 0 | 1.58M | Kevin Tang | Manager, Tang Capital Management, LLC, General Partner | |
| TANG CAPITAL PARTNERS INTERNATIONAL, LP | 2.7% | 840K | 0 | 840K | Kevin Tang | Manager, Tang Capital Management, LLC, General Partner | |
| TANG CAPITAL PARTNERS III, INC | 0% | 0 | 0 | 0 | Kevin Tang | Chief Executive Officer | |
| TANG CAPITAL PARTNERS IV, INC | 0% | 0 | 0 | 0 | Kevin Tang | Chief Executive Officer |