| 1 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Dec 2024 |
| 2 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
| 3 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Dec 2024 |
| 4 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2024 |
| 5 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 6 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 7 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Dec 2024 |
| 8 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 9 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 10 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 11 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2024 |
| 12 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 13 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2024 |
| 14 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 15 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 16 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2024 |
| 17 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 18 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2024 |
| 19 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2024 |
| 20 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |