| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Casdin Capital, LLC | 15% | 7,207,165 | 0 | 7,207,165 | By Eli Casdin | Eli Casdin / Managing Member | 0001534261 |
| Casdin Partners Master Fund, L.P. | 15% | 7,207,165 | 0 | 7,207,165 | By Eli Casdin | Eli Casdin / Managing Member of its General Partner | |
| Casdin Partners GP, LLC | 15% | 7,207,165 | 0 | 7,207,165 | By Eli Casdin | Eli Casdin / Managing Member | |
| Eli Casdin | 15% | 7,207,165 | 0 | 7,207,165 | By Eli Casdin | Eli Casdin |