| 1 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Mar 2025 |
| 2 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2025 |
| 3 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2025 |
| 4 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Feb 2025 |
| 5 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Mar 2025 |
| 6 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Feb 2025 |
| 7 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 8 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Mar 2025 |
| 9 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2025 |
| 10 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 11 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 12 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 13 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 14 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 15 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 16 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 17 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 18 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | Mar 2025 |
| 19 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2025 |
| 20 | KLBW Partners LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 21 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Mar 2025 |
| 22 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 23 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 24 | Kolar Petroleum Inc | Oklahoma City, OK 73162-1509 | Oil & Gas Operator | Jun 2007 |
| 25 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |
| 26 | KT Energy Inc | Enid, OK 73702-2365 | Oil & Gas Operator | Feb 2025 |
| 27 | Kybenco Disposals LLC | Maysville, OK 73052 | Oil Operator | Sep 2022 |