| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Kaiser-Francis O | Oil & Gas Operator | Oct 1995 | |
| 2 | Kaiser-Francis Oil | Oil Operator | Nov 1995 | |
| 3 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 4 | Kansas Oil Prope | Oil & Gas Operator | Sep 1991 | |
| 5 | Kimbark Oil & Ga | Oil & Gas Operator | Aug 1992 | |
| 6 | Kirkman W L Inco | Oil & Gas Operator | Dec 1994 | |
| 7 | Knighton Oil Com | Oil & Gas Operator | Nov 1996 | |
| 8 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 9 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |