| 1 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 2 | Cal-Tex Fossil, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 3 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2025 |
| 4 | Carter E&P, LLC | Johnson City, TX 78636 | Oil & Gas Operator | Dec 2016 |
| 5 | Carter, Gertrude (Trudy) | Rockwall, TX 75032 | Oil & Gas Operator | Apr 2013 |
| 6 | Chalker Operating Inc. | Richmond, TX 77406 | Oil & Gas Operator | Jul 2016 |
| 7 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 8 | Chase Energy, Inc. | Austin, TX 78763 | Oil & Gas Operator | Oct 2001 |
| 9 | Cheatham, Joe R. Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Dec 2018 |
| 10 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 11 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2025 |
| 12 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Mar 2025 |
| 13 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 14 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 15 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 16 | Colt Operating Corporation | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 17 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2025 |
| 18 | Comet Production | Conroe, TX 77305 | Oil Operator | Mar 2025 |
| 19 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 20 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 21 | Creative Oil & Gas Operating,LLC | Giddings, TX 78942 | Oil & Gas Operator | May 2024 |
| 22 | Creative Oil And Gas Op II, LLC | San Antonio, TX 78246 | Oil Operator | Mar 2025 |
| 23 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 24 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2025 |
| 25 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 26 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |