| 1 | Warrior Resources Inc. | Mexia, TX 76667 | Oil & Gas Operator | Oct 2025 |
| 2 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 3 | WCS Oil & Gas Corporation | Dallas, TX 75209 | Oil & Gas Operator | Aug 2021 |
| 4 | Weber Energy Corporation | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 5 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Oct 2025 |
| 6 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 7 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Oct 2025 |
| 8 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 9 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 10 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 11 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Oct 2025 |
| 12 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 13 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Oct 2025 |
| 14 | Williams, Clayton Energy, L.L.C | Midland, TX 79705 | Oil & Gas Operator | May 1993 |
| 15 | Williams, Clayton W., Jr., Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 16 | Williams-Cody, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 1994 |