| 1 | Walbet | Monahans, TX 79756 | Oil & Gas Operator | Dec 1993 |
| 2 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 3 | Wallace Operating Company LLC | Metairie, LA 70003 | Gas Operator | Oct 2025 |
| 4 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 5 | Walton Properties LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 6 | Warren Production Services | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2025 |
| 7 | Waterbridge Texas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 8 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 9 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Oct 2025 |
| 10 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 11 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 12 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 13 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Oct 2025 |
| 14 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 15 | White Sail Resources LLC | Austin, TX 78731 | Oil Operator | Oct 2025 |
| 16 | White, Cecil | Monahans, TX 79756 | Oil & Gas Operator | Mar 2017 |
| 17 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 18 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 19 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 20 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Oct 2025 |
| 21 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 22 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Oct 2025 |
| 23 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 24 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 25 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 26 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 27 | Wyco Oil & Gas LLC | Odessa, TX 79766 | Oil & Gas Operator | Jan 2024 |