| 1 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | May 2024 |
| 2 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | May 2024 |
| 3 | Caddo Creek Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1994 |
| 4 | Cam Company | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2004 |
| 5 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2024 |
| 6 | Capco Offshore Of Texas, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2024 |
| 7 | Capco Offshore, Inc. | Irving, TX 75063 | Oil & Gas Operator | May 2012 |
| 8 | Caraway, Robert | Cisco, TX 76437 | Oil & Gas Operator | May 2024 |
| 9 | Caraway, Robert R. | Cisco, TX 76437 | Oil & Gas Operator | May 2024 |
| 10 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | May 2024 |
| 11 | Casteel, Hoyt F. | Graham, TX 76450 | Oil & Gas Operator | Nov 2001 |
| 12 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | May 2024 |
| 13 | Centurion Operating Corporation | Rockwall, TX 75087 | Oil & Gas Operator | May 2024 |
| 14 | Certified Petroleum Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | May 2006 |
| 15 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 16 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2024 |
| 17 | Chenoweth, Grover | Ranger, TX 76470 | Oil & Gas Operator | May 2024 |
| 18 | Cherokee Production Corp. | Greenville, TX 75401 | Oil & Gas Operator | May 2024 |
| 19 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2024 |
| 20 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 21 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 22 | Clausen, A. G. | Cross Plains, TX 76443 | Oil & Gas Operator | May 2024 |
| 23 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 24 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 25 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 26 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 27 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | May 2024 |
| 28 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 29 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2024 |
| 30 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | May 2024 |
| 31 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 32 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 33 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2024 |
| 34 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | May 2024 |
| 35 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 36 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | May 2024 |