| 1 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Mar 2025 |
| 2 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 3 | Watco Energy | Jacksboro, TX 76458 | Oil & Gas Operator | Mar 2025 |
| 4 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 5 | Wellington Securities, Inc. | Plano, TX 75093 | Gas Operator | Jul 2014 |
| 6 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Mar 2025 |
| 7 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 8 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 9 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 10 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 11 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Mar 2025 |
| 12 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 13 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Mar 2025 |
| 14 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 15 | White Heart, Inc. | Georgetown, TX 78628 | Gas Operator | Jun 1996 |
| 16 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 17 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Dec 2024 |
| 18 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 19 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 20 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 21 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 22 | Winchester Oil & Gas LLC | Katy, TX 77449 | Oil Operator | Mar 2025 |
| 23 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Mar 2025 |
| 24 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Mar 2025 |
| 25 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Mar 2025 |
| 26 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 27 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 28 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |
| 29 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Mar 2025 |