| 1 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 2 | C-D Oil Company, Inc. | Austin, TX 78731 | Oil Operator | Mar 2025 |
| 3 | Camino Real Technologies Inc | Temple, TX 76502 | Oil Operator | Mar 2025 |
| 4 | Can'T Complain Operating Co. | Georgetown, TX 78633 | Oil & Gas Operator | Mar 2025 |
| 5 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2025 |
| 6 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 7 | Carter, Shirley Oil Co | Round Rock, TX 78665 | Oil & Gas Operator | Jun 2018 |
| 8 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2025 |
| 9 | Central Plains Oil&Gas Corp. (A) | Bryan, TX 77802 | Oil & Gas Operator | Mar 2003 |
| 10 | Chama Resources | Dallas, TX 75354 | Oil & Gas Operator | Apr 2009 |
| 11 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 12 | Chisholm Oil Investments | Seabrook, TX 77586 | Oil & Gas Operator | Mar 2025 |
| 13 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2025 |
| 14 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 15 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 16 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Mar 2025 |
| 17 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2025 |
| 18 | Comet Production | Conroe, TX 77305 | Oil Operator | Mar 2025 |
| 19 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 20 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 21 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Mar 2025 |
| 22 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |