| 1 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 2 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Sep 2025 |
| 3 | Cali Crude LLC | Austin, TX 78738 | Oil Operator | Sep 2025 |
| 4 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 5 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Sep 2025 |
| 6 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 7 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 8 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 9 | Carpco Efficient Energy Co., LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 10 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 11 | Carter, Thomas J. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1995 |
| 12 | Cci East Texas Upstream LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2021 |
| 13 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 14 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jun 2025 |
| 15 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 16 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 17 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 18 | Chestnut Explor. And Prod., Inc. | Dallas, TX 75208 | Oil & Gas Operator | Sep 2025 |
| 19 | Chestnut Petroleum, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Nov 2011 |
| 20 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 21 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 22 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Sep 2025 |
| 23 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 24 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Sep 2025 |
| 25 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 26 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Sep 2025 |
| 27 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 28 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 29 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 30 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 31 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 32 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Sep 2025 |
| 33 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 34 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 35 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 36 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 37 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 38 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 39 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 40 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Sep 2025 |
| 41 | Compass Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 42 | Concord Operating Incorporated | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2008 |
| 43 | Cook Exploration Co. | Longview, TX 75602 | Oil & Gas Operator | Sep 2025 |
| 44 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2025 |
| 45 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 46 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 2025 |
| 47 | Cotton Valley Operations, Inc. | Longview, TX 75608 | Oil & Gas Operator | Sep 2025 |
| 48 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 49 | Craig, J. E. G. Estate | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 50 | Craton Energy Company II LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2006 |
| 51 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Sep 2025 |
| 52 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 53 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Sep 2025 |
| 54 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Sep 2025 |
| 55 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 56 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 57 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 58 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Sep 2025 |