| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Kavanaugh Energy Services, Inc. | Gas Operator | Jul 2025 | |
| 2 | Kelley Industries, Inc. | Waynesboro, MS 39367 | Oil & Gas Operator | Jul 2005 |
| 3 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 4 | Kelton Co. | Oil Operator | Dec 1964 | |
| 5 | Kelton Operating Co., Inc. | Oil Operator | Jul 1991 | |
| 6 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 7 | Kukui Operating Company | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |