| 1 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 2 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 3 | Wagner & Brown LP | Midland, TX 79702-1714 | Oil & Gas Operator | Aug 2022 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 5 | Wagon Wheel Production Company | Crawford, OK 73638-9502 | Oil & Gas Operator | Jan 2022 |
| 6 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Dec 2023 |
| 7 | Walsh Jr F Howard Opr Co Inc | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Feb 2016 |
| 8 | Walters Oil Well Service Inc | Walters, OK 73572-0467 | Oil & Gas Operator | Nov 2000 |
| 9 | Ward Gas Marketing Inc | Enid, OK 73702 | Oil & Gas Operator | Sep 2011 |
| 10 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 11 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2024 |
| 12 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 13 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 14 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |
| 15 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 16 | Wheeler Midstream LLC | Houston, TX 77002 | Oil & Gas Operator | May 2018 |
| 17 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 18 | White River Energy LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2010 |
| 19 | White Star Petroleum II LLC | | Oil & Gas Operator | Jan 2024 |
| 20 | White Star Petroleum LLC | | Oil & Gas Operator | Jan 2024 |
| 21 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 22 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 23 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 24 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 25 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2024 |
| 26 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2024 |
| 27 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 28 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 29 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 30 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 31 | WN Operating Inc | Okmulgee, OK 74447-0551 | Oil & Gas Operator | Jan 2024 |
| 32 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 33 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 34 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |
| 35 | WR Oil & Gas LLC | | Oil & Gas Operator | Feb 2024 |