| 1 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 2 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 3 | Wagon Wheel Production Company | Crawford, OK 73638-9502 | Oil & Gas Operator | Jan 2022 |
| 4 | Walker Gas Company | Romney, WV 25757-0000 | Oil & Gas Operator | Dec 2018 |
| 5 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Apr 2024 |
| 6 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 7 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 8 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |
| 9 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2024 |
| 10 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Feb 2024 |
| 11 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2024 |
| 12 | Williford Petroleum LLC | Green CV SPGS, FL 32043 | Oil & Gas Operator | Apr 2024 |
| 13 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Feb 2024 |
| 14 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 15 | Winston Oil Co | Marietta, OH 45750-754-754 | Oil & Gas Operator | Feb 2024 |
| 16 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 17 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |