| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Devon WB Holdco L.L.C. | 29% | 17,757,225 | 0 | 17,757,225 | /s/ Jeffrey L. Ritenour | Jeffrey L. Ritenour, Executive Vice President | |
| WPX Energy Permian, LLC | 29% | 17,757,225 | 0 | 17,757,225 | /s/ Jeffrey L. Ritenour | Jeffrey L. Ritenour, Executive Vice President | |
| WPX Energy, Inc. | 29% | 17,757,225 | 0 | 17,757,225 | /s/ Jeffrey L. Ritenour | Jeffrey L. Ritenour, Executive Vice President and Chief Financial Officer | |
| Devon Energy Corporation | 29% | 17,757,225 | 0 | 17,757,225 | /s/ Jeffrey L. Ritenour | Jeffrey L. Ritenour, Executive Vice President and Chief Financial Officer |