| 1 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Jan 2025 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 3 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Jan 2025 |
| 4 | Kardaleff Steven T | Lawton, OK 73507-8471 | Oil Operator | Mar 2015 |
| 5 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Dec 2024 |
| 6 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Dec 2024 |
| 7 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 8 | Kelmar Oil Company | Chickasha, OK 73018 | Oil & Gas Operator | Jan 2025 |
| 9 | Kepasa Corp | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2025 |
| 10 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 11 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 12 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 13 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 14 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2024 |
| 15 | King Energy LLC | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Jan 2025 |
| 16 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 17 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | Jan 2025 |
| 18 | Kirby Exploration Co | Houston, TX 77251 | Oil & Gas Operator | Jan 2014 |
| 19 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 20 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 21 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Mar 2025 |