| 1 | W & T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 2 | W. T. Boyle & Co. | Graham, TX 76450 | Oil Operator | Mar 2008 |
| 3 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 4 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 5 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 6 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 7 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Jul 2025 |
| 8 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Jun 2025 |
| 9 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 10 | Way, Ralph L., Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 11 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 12 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 13 | Wheeler Operating Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Oct 2025 |
| 14 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 15 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 16 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 17 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 18 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 19 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 20 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 21 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 22 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 23 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 24 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 25 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 26 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |