| 1 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 2 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 3 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Mar 2025 |
| 4 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 5 | WFD Oil Corporation | Edmond, OK 73012 | Oil & Gas Operator | Mar 2025 |
| 6 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 7 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2025 |
| 8 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 9 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 10 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 11 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2025 |
| 12 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 13 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Jun 2025 |
| 14 | Wohlford Properties Inc | Barling, AR 72923 | Gas Operator | Apr 2022 |
| 15 | Wolf Howard Lee | Burneyville, OK 73430-9617 | Oil & Gas Operator | Jun 2000 |
| 16 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 17 | Wood Oil Company | Tulsa, OK 74103 | Gas Operator | Oct 1997 |
| 18 | WPX Energy Mid-Continent Co | Oklahoma City, OK 73102-5010 | Oil & Gas Operator | Apr 2016 |
| 19 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Feb 2025 |
| 20 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |