| 1 | K & E Oil & Gas Co. | Bayfield, CO 81122 | Oil & Gas Operator | Oct 2008 |
| 2 | K & K Oil Co. | Corsicana, TX 75109 | Oil & Gas Operator | May 2024 |
| 3 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2024 |
| 4 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | May 2024 |
| 5 | KDM Production Co | Ozona, TX 76943 | Oil & Gas Operator | May 2024 |
| 6 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | May 2024 |
| 7 | Kern Co. | Houston, TX 77095 | Oil & Gas Operator | Jan 2021 |
| 8 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 9 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 10 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 11 | Kidd Johnson Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2013 |
| 12 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | May 2024 |
| 13 | Kimbrough Engineering Co, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2014 |
| 14 | Kimbrough, D. E. | Iraan, TX 79744 | Oil & Gas Operator | May 2024 |
| 15 | Kimsey, Roy E., Jr. | Midland, TX 79701 | Oil & Gas Operator | May 2018 |
| 16 | Kindee Oil & Gas Texas, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2016 |
| 17 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 18 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 19 | Kinder Morgan Sacroc LP | Snyder, TX 79549 | Oil & Gas Operator | Dec 2003 |
| 20 | Kindred Petroleum Company | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 21 | Kinney Incorporated | Andrews, TX 79714 | Oil & Gas Operator | May 2024 |
| 22 | Klassen Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | May 2024 |
| 23 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 24 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 25 | Ksabe Energy Partners, LLC | Oklahoma City, OK 73106 | Oil Operator | May 2024 |
| 26 | Kstone Energy, LLC | Oklahoma City, OK 73106 | Oil Operator | May 2024 |