| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Wells Energy Com | Oil & Gas Operator | Mar 1994 | |
| 2 | Wenert Trich Oil | Oil & Gas Operator | Jul 1990 | |
| 3 | Western Oil Comp | Oil Operator | Aug 1989 | |
| 4 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 5 | White & Ellis DR | Oil & Gas Operator | Aug 1995 | |
| 6 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2023 |
| 7 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 8 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 9 | Woolsey Operating Company, LLC | Wichita, KS 67226 | Oil & Gas Operator | Dec 2023 |
| 10 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |