| 1 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Dec 2024 |
| 2 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | Dec 2024 |
| 3 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Dec 2024 |
| 4 | Cantro Exploration, Inc. | San Antonio, TX 78270 | Oil & Gas Operator | May 2000 |
| 5 | Cardinal Operating Corporation | Waxahachie, TX 75165 | Oil & Gas Operator | Jan 1997 |
| 6 | Carter Exploration Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 7 | Charro Operating LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2024 |
| 8 | Chilton Energy | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Sep 2006 |
| 9 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | Dec 2024 |
| 10 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Dec 2024 |
| 11 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Dec 2024 |
| 12 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 13 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Dec 2024 |
| 14 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 15 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Dec 2024 |
| 16 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
| 17 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 18 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Dec 2024 |
| 19 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Dec 2024 |
| 20 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 21 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Dec 2024 |
| 22 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 23 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 24 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 25 | Copano Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 26 | Copano Gas Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 27 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Dec 2024 |
| 28 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 29 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 30 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 31 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2024 |
| 32 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |