| 2801 | Cypress Resources | | Oil & Gas Operator | Jul 2004 |
| 2802 | Cyrus, Scott | Louisa, KY 41230 | Oil Operator | Dec 2023 |
| 2803 | Cyrus, Wade T | Fort Gay, WV 25574 | Oil & Gas Operator | Dec 2013 |
| 2804 | Cytex South Texas Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Nov 2025 |
| 2805 | Czar Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Oct 1992 |
| 2806 | Czarniak, Dennis G. | Holland, NY 14080 | Gas Operator | Dec 2024 |
| 2807 | Czerniak, Michael A. And Cheryl A. | Lakewood, NY 14750 | Gas Operator | Dec 2024 |
| 2808 | Czesak Dairy Farm, LLC | Chaffee, NY 14030 | Gas Operator | Dec 2024 |
| 2809 | Czworka, Terry D. | Le Roy, NY 14482 | Gas Operator | Dec 2024 |