| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | May 2025 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2025 |
| 3 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 4 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 5 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 6 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | May 2025 |
| 7 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 8 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |