| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Ridgeback Capital Investments L.P. | 3.8% | 1.44M | 0 | 1.44M | /s/ Nicole Venezia | Nicole Venezia/General Counsel | |
| Ridgeback Capital Investments LLC | 3.8% | 1.44M | 0 | 1.44M | /s/ Nicole Venezia | Nicole Venezia/General Counsel | |
| Ridgeback Capital Management LLC | 3.8% | 1.44M | 0 | 1.44M | /s/ Nicole Venezia | Nicole Venezia/General Counsel |