| 1 | K & M Oil Company LLC | Hennessey, OK 73742-0597 | Oil & Gas Operator | Feb 2024 |
| 2 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 3 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055-0407 | Oil & Gas Operator | Feb 2024 |
| 4 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2024 |
| 5 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 6 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2024 |
| 7 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 8 | Kardaleff Steven T | Lawton, OK 73507-8471 | Oil Operator | Mar 2015 |
| 9 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | May 2024 |
| 10 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 11 | Kechi Energy LLC | Chickasha, OK 73023-1433 | Oil & Gas Operator | Feb 2024 |
| 12 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2024 |
| 13 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 14 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 15 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 16 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 17 | Key Oil Company | Duncan, OK 73533 | Oil & Gas Operator | Dec 2021 |
| 18 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2024 |
| 19 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2024 |
| 20 | Keystone Production Company | Duncan, OK 73533-9117 | Oil & Gas Operator | May 2005 |
| 21 | Kiester Operating Company | Oklahoma City, OK 73101-0705 | Oil & Gas Operator | Feb 2024 |
| 22 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2024 |
| 23 | Kingfisher Resources Inc | Clinton, OK 73601-1237 | Oil & Gas Operator | Feb 2024 |
| 24 | Kirk Billie E | Morris, OK 74445-0146 | Oil & Gas Operator | Dec 2023 |
| 25 | Kirk David | Midland, TX 79705-7433 | Oil & Gas Operator | Jan 2024 |
| 26 | Kirkpatrick Oil Company | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2024 |
| 27 | KLBW Partners LLC | Ratliff City, OK 73481-0088 | Oil & Gas Operator | Jan 2024 |
| 28 | Kleen Oilfield Services Co | Velma, OK 73491-0178 | Oil & Gas Operator | Nov 2023 |
| 29 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2024 |
| 30 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 31 | Knutson Production Company | Loco, OK 73442-9706 | Oil & Gas Operator | Feb 2024 |
| 32 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 33 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | May 2024 |
| 34 | Kolar Petroleum Inc | Oklahoma City, OK 73162-1509 | Oil & Gas Operator | Jun 2007 |
| 35 | Krumme Oil Company LLP | Bristow, OK 74010-0749 | Oil & Gas Operator | Jan 2024 |
| 36 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 37 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |