| 1 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 2 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 3 | Waskom, Reagan Operating Company | Boerne, TX 78006 | Gas Operator | Mar 2005 |
| 4 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 5 | WB Mullin Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 7 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 8 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 9 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 10 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2025 |
| 11 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 12 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 13 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 14 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 15 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 16 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 17 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 18 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 19 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 20 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Oct 2025 |
| 21 | Wichita Falls Oil Expl. Co. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 22 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 23 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 24 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 25 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 26 | Wilson, W.W. Jr. Properties | Abilene, TX 79605 | Oil & Gas Operator | Jul 1995 |
| 27 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Dec 2025 |
| 28 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 29 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 30 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 31 | WX Company LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2017 |