| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | C & C Minerals LTD | Oil & Gas Operator | Dec 2019 | |
| 2 | California Resources Production Corporation | Oil & Gas Operator | Jul 2025 | |
| 3 | Capitol Oil Corporation | Oil & Gas Operator | Jul 2025 | |
| 4 | Carneros Energy Inc. | Oil & Gas Operator | Dec 2004 | |
| 5 | Casex Company | Oil & Gas Operator | Dec 2007 | |
| 6 | Castle Minerals | Oil & Gas Operator | Dec 2018 | |
| 7 | Channel Exploration Company | Oil & Gas Operator | Feb 1997 | |
| 8 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 9 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 10 | Concordia Resources Inc. | Oil & Gas Operator | Aug 2025 | |
| 11 | Crest Oil & Gas Management Corp. | Oil & Gas Operator | Jul 2025 |