| 101 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2025 |
| 102 | Continental-Emsco Co | Hobbs, NM 88241 | Oil & Gas Operator | Jun 1995 |
| 103 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 104 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 105 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 106 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 107 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 108 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 109 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 110 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 111 | Coterra Energy Operating E LLC | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 112 | Coterra Energy Operating F LLC | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 113 | Coterra Energy Operating M LLC | Midland, TX 79706 | Oil & Gas Operator | Aug 2019 |
| 114 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 115 | Craft Operating NM LLC | Houston, TX 77057 | Oil Operator | Apr 2024 |
| 116 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 117 | Crestridge DRLG. & Prod.Co.,LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 118 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Sep 2025 |
| 119 | Cross Border Resources, Inc. | Dallas, TX 75235 | Oil & Gas Operator | Jan 2022 |
| 120 | Cross Creek Corporation | Duncan, OK 73534 | Oil & Gas Operator | Mar 1999 |
| 121 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 122 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 123 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 124 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 125 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |