| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| U.S. Venture Partners XII, L.P. | 16% | 4,305,806 | 0 | 4,305,806 | /s/ Dale Holladay | Dale Holladay, Authorized Signatory | |
| Presidio Management Group XII, L.L.C. | 21% | 5,642,073 | 0 | 5,642,073 | /s/ Dale Holladay | Dale Holladay, Authorized Signatory | |
| Casey M Tansey | 22% | 5,842,073 | 200,000 | 5,642,073 | /s/ Dale Holladay | Dale Holladay, Attorney-in-Fact |