| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | K R M Petroleum | Oil & Gas Operator | Jan 1990 | |
| 2 | Kaiser-Francis O | Oil & Gas Operator | Oct 1995 | |
| 3 | Kaiser-Francis Oil | Oil Operator | Nov 1995 | |
| 4 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 5 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Jun 2025 |