| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Ridgeback Capital Investments L.P. | 5.1% | 1.94M | 0 | 1.94M | /s/ Nicole Venezia | Nicole Venezia/General Counsel | |
| Ridgeback Capital Investments LLC | 5.1% | 1.94M | 0 | 1.94M | /s/ Nicole Venezia | Nicole Venezia/General Counsel | |
| Ridgeback Capital Management LLC | 5.1% | 1.94M | 0 | 1.94M | /s/ Nicole Venezia | Nicole Venezia/General Counsel |