| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 401 | Curt'S Oil Opera | Oil Operator | Nov 1994 | |
| 402 | Curt'S Oil Operation LLC | Hoisington, KS 67544 | Oil & Gas Operator | Apr 2026 |
| 403 | Custom Service LLC | St John, KS 67576 | Oil Operator | Mar 2026 |
| 404 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Dec 2025 |
| 405 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Apr 2026 |
| 406 | Cycle Oil & Gas LTD | Gas Operator | Apr 2026 | |
| 407 | Cyclone Petroleu | Oil & Gas Operator | Nov 1995 | |
| 408 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Apr 2026 |