| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 2 | Carl W Jones Et Al | Oil & Gas Operator | Jul 1995 | |
| 3 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 4 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 5 | Colorado Oil Co., Inc. | Oil & Gas Operator | Dec 1977 | |
| 6 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Jun 2025 |
| 7 | Concor Petroleum, Inc. | Oil & Gas Operator | Feb 1983 | |
| 8 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 9 | Crystal Oil And Land Company | Oil & Gas Operator | May 1992 | |
| 10 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 11 | CSC Energy Corp. | Oil & Gas Operator | Dec 2009 |