| 1 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Oct 2025 |
| 2 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Jun 2025 |
| 3 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2025 |
| 4 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 5 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 6 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2025 |
| 7 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 8 | Katy Drilling Corporation | Tulsa, OK 74146-3717 | Oil & Gas Operator | Apr 2020 |
| 9 | Kay Production Company Inc | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 10 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jun 2025 |
| 11 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Jul 2025 |
| 12 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 13 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 14 | Kelley James C Estate | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 15 | Kelly Cook Oil LLC | Shawnee, OK 74804-3148 | Oil & Gas Operator | Jun 2025 |
| 16 | Kendol Exploration Inc | Oklahoma City, OK 73105-2513 | Oil & Gas Operator | Mar 2025 |
| 17 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 18 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 19 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 20 | Kimco Oil And Gas | Wewoka, OK 74884-0613 | Oil & Gas Operator | Jul 2016 |
| 21 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 22 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Jul 2025 |
| 23 | Koby Oil Company LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 24 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 25 | Kraker Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 1995 |
| 26 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |