| 1 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Oct 2025 |
| 2 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 3 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 4 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 5 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 6 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 7 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 8 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 9 | White Stride LLC | Piedmont, OK 73078 | Oil & Gas Operator | Oct 2025 |
| 10 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 11 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 12 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 13 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 14 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 15 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |
| 16 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Oct 2025 |
| 17 | Wright Aurora Enterprises, LLC | Canyon Lake, TX 78133 | Oil & Gas Operator | May 2020 |
| 18 | Wright Trucking, Inc. | Weatherford, OK 73096 | Oil & Gas Operator | Feb 2019 |