| 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 | May 2024 |
| 3 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 4 | Caddo Management, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2024 |
| 5 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 6 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2024 |
| 7 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | May 2024 |
| 8 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 9 | Carbon Field Energy, L.L.C. | Kilgore, TX 75663 | Oil Operator | Apr 2019 |
| 10 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 11 | Caribe Production Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 1993 |
| 12 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 13 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 14 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | May 2024 |
| 15 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 16 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 17 | Castle Production Company | Henderson, TX 75652 | Oil & Gas Operator | May 1997 |
| 18 | Cavalry Resources LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2010 |
| 19 | Cci East Texas Upstream LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2021 |
| 20 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 21 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jan 2024 |
| 22 | Cex Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 23 | Chalker Energy Management II,LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 24 | Chalker Energy Management,LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
| 25 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2024 |
| 26 | Charger Oil & Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2014 |
| 27 | CHB Interests, LLC | Kilgore, TX 75663 | Oil Operator | Oct 2011 |
| 28 | CHB Investments | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2004 |
| 29 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2024 |
| 30 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 31 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 32 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 33 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 34 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | May 2024 |
| 35 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | May 2024 |
| 36 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 37 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | May 2024 |
| 38 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 39 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 40 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 41 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 42 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2024 |
| 43 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 44 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 45 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Aug 2022 |
| 46 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 47 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jan 2024 |
| 48 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2024 |
| 49 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 50 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | May 2024 |
| 51 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 52 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | May 2024 |
| 53 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 54 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 55 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 56 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 57 | Conquest Energy, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2024 |
| 58 | Consolidated Natural Res. Corp. | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2016 |
| 59 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 60 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 61 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2024 |
| 62 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 63 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 64 | Craton Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2005 |
| 65 | Craton Energy Holdings III, LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2009 |
| 66 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | May 2024 |
| 67 | CRD Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2021 |
| 68 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | May 2024 |
| 69 | Crest Engineering Services,Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2023 |
| 70 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 71 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 72 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | May 2024 |
| 73 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | May 2024 |