| 1 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | Dec 2025 |
| 2 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Dec 2025 |
| 3 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Dec 2025 |
| 4 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 5 | Cactus Gas & Oil, Inc. | San Antonio, TX 78259 | Oil & Gas Operator | Dec 2025 |
| 6 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 7 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 8 | Cantera Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2017 |
| 9 | Cantro Exploration, Inc. | San Antonio, TX 78270 | Oil & Gas Operator | May 2000 |
| 10 | Canyon Creek Energy Texas, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2017 |
| 11 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 12 | Carter Exploration Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 13 | Cedar Point Oil Company | Baytown, TX 77520 | Oil & Gas Operator | Aug 2003 |
| 14 | Ceniza Petroleum, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 15 | Cet Energy Corporation | Spring, TX 77391 | Oil & Gas Operator | Nov 2003 |
| 16 | CG Technical Operating Co, LLC | Stamford, TX 79553 | Oil Operator | Dec 2025 |
| 17 | Chanoco Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Jan 1998 |
| 18 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 19 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 20 | Chapco, Inc. | Benavides, TX 78341 | Oil & Gas Operator | Dec 2025 |
| 21 | Charro Operating, L.L.C. | Englewood, CO 80112 | Oil & Gas Operator | Dec 2025 |
| 22 | Chartex Petroleum Company | Houston, TX 77070 | Oil & Gas Operator | Aug 2000 |
| 23 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 24 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 25 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | Dec 2025 |
| 26 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 27 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Dec 2025 |
| 28 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Dec 2025 |
| 29 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 30 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 31 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 32 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Dec 2025 |
| 33 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 34 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 35 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 36 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 37 | Collins Resources, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Mar 2011 |
| 38 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 39 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 40 | Concord Operating Incorporated | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2008 |
| 41 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 42 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 43 | Cook Marshall Operating, Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 1995 |
| 44 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 45 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Dec 2025 |
| 46 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 47 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 48 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 49 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 50 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 51 | Crimson Energy Company, LC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2004 |
| 52 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Dec 2025 |
| 53 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 54 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 55 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 56 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 57 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |