| 1 | K & M Oil Company LLC | Hennessey, OK 73742-0597 | Oil & Gas Operator | Feb 2024 |
| 2 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2024 |
| 3 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 4 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 5 | Kate F H | Oklahoma City, OK 73122 | Oil & Gas Operator | Jun 2000 |
| 6 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 7 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Feb 2024 |
| 8 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 9 | Kelloil Inc | Fort Worth, TX 76116-5600 | Oil & Gas Operator | Mar 2015 |
| 10 | Kelly Jr Walter A Opr Co | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 11 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 12 | Key Energy Corporation | Enid, OK 73702-5349 | Oil & Gas Operator | Oct 2017 |
| 13 | Keystone Gas Corporation | Drumright, OK 7403O | Oil & Gas Operator | Apr 2015 |
| 14 | Kibtec Oil & Gas Inc | Guthrie, OK 73044-1215 | Oil & Gas Operator | Nov 2023 |
| 15 | Kiester Operating Company | Oklahoma City, OK 73101-0705 | Oil & Gas Operator | Feb 2024 |
| 16 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 17 | Kirkpatrick Oil Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 18 | KJR Services LLC | | Oil & Gas Operator | Dec 2023 |
| 19 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2024 |
| 20 | Kloberdanz, Paul E. | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 21 | Koby Oil Company LLC | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Jan 2024 |
| 22 | Koda Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 23 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 24 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |