| 1 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 2 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 3 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 4 | Waterbridge Arkoma Operating LLC | Houston, TX 77056 | Oil Operator | Feb 2025 |
| 5 | Weatherly Nell M Estate | Ada, OK 74821-0669 | Oil & Gas Operator | Feb 1997 |
| 6 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Mar 2025 |
| 7 | WFD Oil Corporation | Edmond, OK 73012 | Oil & Gas Operator | Mar 2025 |
| 8 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 9 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2025 |
| 10 | Whitecap Energy L.L.C. | | Oil & Gas Operator | Sep 2018 |
| 11 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 12 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 13 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 14 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 15 | Wilcox Pipe & Supply Co | Oklahoma City, OK 73189 | Oil & Gas Operator | May 2006 |
| 16 | Wild Outdoors Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 17 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Feb 2025 |
| 18 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 19 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 20 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 21 | Wohlford Properties Inc | Barling, AR 72923 | Gas Operator | Apr 2022 |
| 22 | Wolf Howard Lee | Burneyville, OK 73430-9617 | Oil & Gas Operator | Jun 2000 |
| 23 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 24 | WPX Energy Mid-Continent Co | Oklahoma City, OK 73102-5010 | Oil & Gas Operator | Apr 2016 |
| 25 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Feb 2025 |
| 26 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |