| 1 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | Jun 2025 |
| 2 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 3 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 4 | Canyon Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 5 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 6 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 7 | Carter Energy Corporation | Duncanville, TX 75138 | Oil & Gas Operator | Sep 2010 |
| 8 | Case Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 9 | Chaparral Natural Resources,Inc. | Austin, TX 78746 | Oil & Gas Operator | Jun 2025 |
| 10 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 11 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2025 |
| 12 | Chesapeake Permian LP | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Feb 2015 |
| 13 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 14 | Chief Operating LLC | Dallas, TX 75225 | Gas Operator | Mar 2009 |
| 15 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 16 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 17 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Jun 2025 |
| 18 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Jun 2025 |
| 19 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 20 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 21 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 22 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 23 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 24 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 25 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Jun 2025 |