| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | C & E Prod Incor | Oil Operator | Nov 1996 | |
| 2 | Cherokee Valley | Oil Operator | May 1993 | |
| 3 | Cinab, Inc. | FT. Scott, KS 66701 | Oil Operator | Jan 1998 |
| 4 | Clinton, Orville L., Jr. | Paola, KS 66071 | Oil Operator | Apr 2005 |
| 5 | Coen Energy | Oil Operator | Mar 1995 | |
| 6 | Coen Energy Corporation | Overland Park, KS 66221 | Oil Operator | Dec 2023 |
| 7 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Dec 2023 |
| 8 | Cornell Rich M - | Oil & Gas Operator | May 1993 | |
| 9 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Dec 2023 |