| 1 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 2 | Wagner & Brown LP | Midland, TX 79702-1714 | Oil & Gas Operator | Aug 2022 |
| 3 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 4 | Wagon Wheel Production Company | Crawford, OK 73638-9502 | Oil & Gas Operator | Mar 2025 |
| 5 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Jun 2025 |
| 6 | Walsh Jr F Howard Opr Co Inc | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Feb 2016 |
| 7 | Walters Oil Well Service Inc | Walters, OK 73572-0467 | Oil & Gas Operator | Nov 2000 |
| 8 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 9 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2025 |
| 10 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 11 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 12 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 13 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 14 | White Star Petroleum II LLC | Oklahoma City, OK 73113-1360 | Oil & Gas Operator | Jun 2025 |
| 15 | White Star Petroleum LLC | Oklahoma City, OK 73116-7906 | Oil & Gas Operator | Jun 2025 |
| 16 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 17 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 18 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 19 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 20 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 21 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2025 |
| 22 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 23 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 24 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 25 | WN Operating Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Jun 2025 |
| 26 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 27 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 28 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Jul 2025 |
| 29 | Wroten Wiley Jr | Dallas, TX 75252 | Oil & Gas Operator | Jun 1994 |