| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Foresite Capital Fund VI, L.P. | 9.3% | 12.5M | 12.5M | 0 | /s/ James Tananbaum | James Tananbaum, Managing Member of the General Partner | |
| Foresite Capital Management VI, LLC | 9.3% | 12.5M | 12.5M | 0 | /s/ James Tananbaum | James Tananbaum, Managing Member | |
| James Tananbaum | 9.3% | 12.5M | 12.5M | 0 | /s/ James Tananbaum | James Tananbaum |