| 1 | W & W Services, Inc. | Palestine, TX 75802 | Oil & Gas Operator | Mar 2008 |
| 2 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 3 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 4 | Wallis Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 5 | Ward Oil Co. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 6 | WCS Oil & Gas Corporation | Dallas, TX 75209 | Oil & Gas Operator | Aug 2021 |
| 7 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 8 | Weathers Exploration, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 9 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 10 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 11 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 12 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 13 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 14 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 15 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 16 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Oct 2025 |
| 17 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 18 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 19 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 20 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 21 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 22 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 23 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 24 | Worldwide Exploration, Inc | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2002 |
| 25 | WTR Operating LLC | Troup, TX 75789 | Oil & Gas Operator | Oct 2025 |