| 1 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Dec 2024 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
| 3 | Karenco Energy, Incorporated | Seguin, TX 78155 | Oil & Gas Operator | Oct 1997 |
| 4 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 5 | Kerns O & G, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2004 |
| 6 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 7 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
| 8 | Keystone Exploration, Inc | College Sta, TX 77845 | Oil & Gas Operator | Dec 2024 |
| 9 | King Ranch Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 10 | Kingwood Exploration LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 11 | Kody Petroleum Co., Inc. | Daisetta, TX 77533 | Oil & Gas Operator | Dec 2024 |
| 12 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 13 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |