| 1 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 2 | Weaver Energy Corporation | Hennessey, OK 73742-1232 | Oil & Gas Operator | Jul 2025 |
| 3 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Aug 2025 |
| 4 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jul 2025 |
| 5 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 6 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 7 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 8 | Wilcox Pipe & Supply Co | Oklahoma City, OK 73189 | Oil & Gas Operator | May 2006 |
| 9 | Williams Dale And Dorothy Family Trust | Maud, OK 74854-2011 | Oil & Gas Operator | Jun 2025 |
| 10 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 11 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |