| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Oct 2002 |
| 2 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 3 | Cardneaux Inc. | Oil & Gas Operator | Aug 2009 | |
| 4 | Castor Exploration, Inc. | Oil & Gas Operator | Dec 1991 | |
| 5 | Cavalier Oil Co. Et Al | Oil Operator | Jan 1986 | |
| 6 | Cavins Oilfield Services, LLC. | Oil Operator | Apr 2006 | |
| 7 | Cedar Grove Energy Corp. | Oil Operator | Sep 2009 | |
| 8 | Christian Well Service | Oil & Gas Operator | May 1987 | |
| 9 | Cleveland Production Company | Summit, MS 39666 | Oil & Gas Operator | Jul 1999 |
| 10 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Dec 2023 |
| 11 | Cornwell, G. G. | Oil & Gas Operator | Sep 2009 |