| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 3 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Apr 2026 |
| 4 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 5 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 6 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 7 | King Energy LLC | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | May 2026 |
| 8 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | May 2026 |
| 9 | Koch Oil Company | Oil & Gas Operator | May 2017 |