| 1 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 2 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Oct 2025 |
| 3 | Cal-Tex Gas Transmission Co,Inc. | Mabank, TX 75147 | Oil & Gas Operator | Nov 1999 |
| 4 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2025 |
| 5 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 6 | Casey, W. J. | Fairfield, TX 75840 | Oil & Gas Operator | Oct 2025 |
| 7 | Cemco Oil | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2025 |
| 8 | Central Basin Oil Inv. Inc. | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 9 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 10 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 11 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 12 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 13 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 14 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 15 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 16 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 17 | Coley, H. B. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2000 |
| 18 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 19 | Conner-Marrs Company | Tulsa, OK 74105 | Oil & Gas Operator | Oct 2025 |
| 20 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 21 | Contour Expl And Prod, LLC | Dallas, TX 75204 | Oil & Gas Operator | Oct 2025 |
| 22 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Oct 2025 |
| 23 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Oct 2025 |
| 24 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 25 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Oct 2025 |
| 26 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 27 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Oct 2025 |
| 28 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |