| 1 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Dec 2024 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 3 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Mar 2025 |
| 4 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Nov 2024 |
| 5 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Dec 2024 |
| 6 | Keener Energy Company | Tulsa, OK 74103-4043 | Oil & Gas Operator | Jan 2014 |
| 7 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2024 |
| 8 | Kelmac Production Company | Braman, OK 74632-0132 | Oil Operator | Apr 2003 |
| 9 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 10 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 11 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 12 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 13 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jun 2024 |
| 14 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 15 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 16 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 17 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 18 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | Dec 2024 |
| 19 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 20 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Dec 2024 |
| 21 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 22 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2024 |
| 23 | Kybenco Disposals LLC | Maysville, OK 73052 | Oil Operator | Sep 2022 |