| 1 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 2 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Sep 2026 |
| 3 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 4 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Mar 2026 |
| 5 | Waterbridge Texas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 6 | Watson Packer Employee Fund | Monahans, TX 79756 | Oil & Gas Operator | Sep 2026 |
| 7 | West Texas Exploration Co. | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 8 | Western Disposal Systems, Inc. | Corrales, NM 87048 | Oil Operator | Sep 2026 |
| 9 | Western Global Oil, Inc | Deerfld Beach, FL 33442 | Oil Operator | Sep 2026 |
| 10 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Apr 2026 |
| 11 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 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 | Sep 2026 |
| 14 | White'S Industrial Engine'S | Houston, TX 77070 | Oil & Gas Operator | Sep 2026 |
| 15 | Whiteman Industries Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2025 |
| 16 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 17 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 18 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 19 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Sep 2026 |
| 20 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 21 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 22 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 23 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 24 | Wolf Energy | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 25 | Wolf Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2021 |
| 26 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 27 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 28 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |