| 1 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Feb 2026 |
| 2 | Warren Petroleum/Danc Operating | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1998 |
| 3 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 4 | Watson Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2003 |
| 5 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 6 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 7 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |
| 8 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2025 |
| 9 | White Stride LLC | Piedmont, OK 73078 | Oil & Gas Operator | Feb 2026 |
| 10 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 11 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 12 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 13 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 14 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 15 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 16 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Feb 2026 |
| 17 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 18 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 19 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2026 |
| 20 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 21 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Feb 2026 |
| 22 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Feb 2026 |
| 23 | Wolf Creek Exploration Company | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2000 |
| 24 | WPH Operating Company | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2017 |
| 25 | Wright Trucking, Inc. | Weatherford, OK 73096 | Oil & Gas Operator | Feb 2019 |
| 26 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 27 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |