| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Yorktown Energy Partners X, L.P. | 4.5% | 2,502,930 | 0 | 2,502,930 | /s/ Bryan H Lawrence | Bryan H Lawrence / Managing Member of the general partner of the general partner | 0001577919 |
| Yorktown X Company LP | 4.5% | 2,502,930 | 0 | 2,502,930 | /s/ Bryan H Lawrence | Bryan H Lawrence / Managing Member of the general partner | |
| Yorktown X Associates LLC | 4.5% | 2,502,930 | 0 | 2,502,930 | /s/ Bryan H Lawrence | Bryan H Lawrence / Managing Member of the general partner | 0001687161 |