| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Caldwell Entr In | Oil Operator | Dec 1993 | |
| 2 | Carroll Energy, LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2023 |
| 3 | Cherokee Valley | Oil Operator | May 1993 | |
| 4 | Chooch Incorpora | Gas Operator | Dec 1994 | |
| 5 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 6 | Citation Energy | Oil & Gas Operator | Jul 1993 | |
| 7 | City Of Chanute | Chanute, KS 66720 | Oil Operator | Feb 1994 |
| 8 | Cleaver Loraine | Oil Operator | Dec 1996 | |
| 9 | Compressor Syste | Oil Operator | May 1991 | |
| 10 | Connell, Mark Allen | Claflin, KS 67525 | Oil Operator | Dec 2023 |
| 11 | Copperhead Oil | Colony, KS 66015 | Oil Operator | Sep 1985 |
| 12 | Cornell Rich M - | Oil & Gas Operator | May 1993 | |
| 13 | Coronado Oil & G | Oil Operator | Dec 1996 | |
| 14 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |