| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | K. D. Lankford, Jr & L&N DRLG Co | Gas Operator | Dec 2010 | |
| 2 | K. D. Lankford, Jr., Et Al | Gas Operator | Dec 2010 | |
| 3 | Kaiser Oil (U.S.) LTD. | Oil & Gas Operator | Apr 1983 | |
| 4 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 5 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 6 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 7 | Kewanee Oil Company | Houston, TX 77001 | Oil & Gas Operator | Aug 1978 |
| 8 | Keystone Productions, LLC | Gas Operator | Dec 2024 | |
| 9 | Kilco, Inc. | Gas Operator | Sep 1996 |