| 1 | C & A Enterprises | Ballinger, TX 76821 | Oil & Gas Operator | Oct 2025 |
| 2 | C R I Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 1993 |
| 3 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 4 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 5 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 6 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 2025 |
| 7 | Carr Exploration Corp. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 8 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 9 | Cazar Energy Inc | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 10 | CCF, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Apr 1998 |
| 11 | CDJ Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 12 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 13 | Chief Operating Company | Houston, TX 77070 | Oil & Gas Operator | Feb 2004 |
| 14 | Chiodo Corp. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 2025 |
| 15 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 16 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 17 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 18 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 19 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Oct 2025 |
| 20 | Clayton Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2004 |
| 21 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 22 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Oct 2025 |
| 23 | Conquistador Petroleum,Inc. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 24 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 25 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 26 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 27 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Oct 2025 |
| 28 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 29 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Oct 2025 |
| 30 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |