| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| U.S. Venture Partners XII, L.P. | 8.2% | 1,686,403 | 0 | 1,686,403 | /s/ Dale Holladay | Dale Holladay, Attorney-in-Fact | |
| Presidio Management Group XII, L.L.C. | 13.1% | 2,693,121 | 0 | 2,693,121 | /s/ Dale Holladay | Dale Holladay, Attorney-in-Fact | |
| Casey M. Tansey | 13.3% | 2,740,787 | 47,666 | 2,693,121 | /s/ Dale Holladay | Dale Holladay, Attorney-in-Fact |