| 1 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 2 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Jun 2025 |
| 3 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 4 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 5 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Oct 2025 |
| 6 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Aug 2025 |
| 7 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 8 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 9 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 10 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2025 |
| 11 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Oct 2025 |
| 12 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 13 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 14 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 15 | Wohlford Properties Inc | Barling, AR 72923 | Gas Operator | Apr 2022 |
| 16 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 17 | Woodward Disposal Company Inc | Woodward, OK 73801-3234 | Oil & Gas Operator | Sep 2013 |
| 18 | WPX Energy Mid-Continent Co | Oklahoma City, OK 73102-5010 | Oil & Gas Operator | Apr 2016 |
| 19 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jun 2025 |