| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Wausau Development Corporation | Laurel, MS 39440 | Oil & Gas Operator | Sep 2019 |
| 2 | Western Kansas E | Oil Operator | Aug 1993 | |
| 3 | Whitetail Crude, Inc | Ness City, KS 67560 | Oil & Gas Operator | Jun 2025 |
| 4 | Wick'S Petroleum | Oil Operator | Aug 1983 | |
| 5 | Williams, Paul H. | Plainville, KS 67663 | Oil Operator | Mar 1987 |
| 6 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jun 2025 |
| 7 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 8 | Woodman & Iannitti Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2003 |