| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2023 |
| 2 | C & S Oil | Oil Operator | Dec 2019 | |
| 3 | C & S Well Servi | Oil & Gas Operator | Nov 1995 | |
| 4 | Carlin Oil & Gas | Oil Operator | Jan 1994 | |
| 5 | Carroll Energy, LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2023 |
| 6 | CDC Oil, LLC | Chanute, KS 66720 | Oil Operator | Nov 2023 |
| 7 | Cherokee Valley | Oil Operator | May 1993 | |
| 8 | Citation Energy | Oil & Gas Operator | Jul 1993 | |
| 9 | Cleaver Loraine | Oil Operator | Dec 1996 | |
| 10 | Cleaver, Loraine G. (Deceased) Estate | Iola, KS 66749 | Oil Operator | Nov 2009 |
| 11 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Dec 2023 |
| 12 | Colt Energy Inco | Oil & Gas Operator | Dec 1996 | |
| 13 | Colt Oil Company | Andrews, TX 79714 | Oil & Gas Operator | Feb 1996 |