| 1 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Dec 2025 |
| 2 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 3 | C. M. Oil Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2016 |
| 4 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Aug 2025 |
| 5 | Cactus Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Dec 2025 |
| 6 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 7 | Camco Saltwater Transport | George West, TX 78022 | Oil Operator | Feb 2015 |
| 8 | Camco Saltwater Transport,L.L.C. | George West, TX 78022 | Oil Operator | Dec 2025 |
| 9 | Camden Oil & Gas, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Dec 2005 |
| 10 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 11 | Camden Resources, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Dec 2015 |
| 12 | Camelot Oil And Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 13 | Cantu Operating, LLC | McAllen, TX 78504 | Oil Operator | Dec 2025 |
| 14 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 15 | Capital Star Oil & Gas, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 16 | Caribbean Energy LLC II | Cotulla, TX 78014 | Oil & Gas Operator | Dec 2025 |
| 17 | Carrizo Exploration, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2016 |
| 18 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 19 | Carter Exploration Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 20 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 21 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 22 | CCGM Exploration & Prod.,L.C. | Austin, TX 78738 | Oil & Gas Operator | Dec 2025 |
| 23 | Ceniza Petroleum, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 24 | Central Energy Producing Company | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2003 |
| 25 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 26 | Cerberus Engineering, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 27 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Sep 2025 |
| 28 | Chandler Oil & Gas, LLC | Beeville, TX 78102 | Oil & Gas Operator | Dec 2025 |
| 29 | Chaparosa Production Company,Inc | Freer, TX 78357 | Oil & Gas Operator | Dec 2025 |
| 30 | Chapco, Inc. | Benavides, TX 78341 | Oil & Gas Operator | Dec 2025 |
| 31 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 32 | Chesnutt Oil & Gas, Inc. | Mineral, TX 78125 | Oil & Gas Operator | Dec 2025 |
| 33 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 34 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 35 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 36 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Dec 2025 |
| 37 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 38 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 39 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Dec 2025 |
| 40 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Dec 2025 |
| 41 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 42 | Claron Corporation | Houston, TX 77219 | Oil & Gas Operator | Dec 2025 |
| 43 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 44 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 45 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 46 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 47 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 48 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 49 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 50 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 51 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 52 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 53 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2025 |
| 54 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 55 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 56 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 57 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 58 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Dec 2025 |
| 59 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 60 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 61 | Cotton, W. L. | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 1996 |
| 62 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 63 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 64 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 65 | Crawford Energy Operating Co | Houston, TX 77056 | Oil & Gas Operator | Aug 2008 |
| 66 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 67 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 68 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Dec 2025 |
| 69 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 70 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 71 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 72 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 73 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 74 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |