| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Yorktown Energy Partners XI, L.P. | 22.18% | 9.3M | 9.3M | 0 | /s/ Robert A. Signorino | Robert A. Signorino/Managing Member of the General Partner of the General Partner | |
| YORKTOWN XI COMPANY LP | 22.18% | 9.3M | 9.3M | 0 | /s/ Robert A. Signorino | Robert A. Signorino/ Managing Member of the General Partner | |
| YORKTOWN XI ASSOCIATES LLC | 22.18% | 9.3M | 9.3M | 0 | /s/ Robert A. Signorino | Robert A. Signorino/ Managing Member |