| 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 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 4 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 5 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 6 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2025 |
| 7 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 8 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 9 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 10 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 11 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 12 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 13 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 14 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 15 | Chalker Energy Management II,LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 16 | Challenger Energy SVCS Co., LLC | Kilgore, TX 75663 | Oil Operator | Oct 2025 |
| 17 | Chase Energy, Inc. | Austin, TX 78763 | Oil & Gas Operator | Oct 2001 |
| 18 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 19 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 20 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 21 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Oct 2025 |
| 22 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 23 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 24 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 25 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 26 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 27 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 28 | Cook Exploration Co. | Longview, TX 75602 | Oil & Gas Operator | Oct 2025 |
| 29 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 30 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 31 | Craton Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2005 |
| 32 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Oct 2025 |
| 33 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 34 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 35 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |