| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Casdin Capital, LLC | 8.7% | 7,200,000 | 0 | 7,200,000 | /s/ Eli Casdin | Eli Casdin/Managing Member | |
| Casdin Partners Master Fund, L.P. | 8.7% | 7,200,000 | 0 | 7,200,000 | /s/ Eli Casdin | Eli Casdin/Managing Member of its general partner | |
| Casdin Partners GP, LLC | 8.7% | 7,200,000 | 0 | 7,200,000 | /s/ Eli Casdin | Eli Casdin/Managing Member | |
| Eli Casdin | 8.7% | 7,200,000 | 0 | 7,200,000 | /s/ Eli Casdin | Eli Casdin |