| 1 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Apr 2024 |
| 2 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 3 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 4 | Calpine Natural Gas Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2002 |
| 5 | Cameron Engineering, Inc | Montgomery, TX 77356 | Oil & Gas Operator | Jun 2003 |
| 6 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 7 | Camoil, Inc. | Columbus, TX 78934 | Oil & Gas Operator | Apr 2024 |
| 8 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 9 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 10 | Carter Exploration Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 11 | Cashco, L.L.C. | Houston, TX 77024 | Oil & Gas Operator | Jul 1999 |
| 12 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 13 | Cavalry Resources LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2010 |
| 14 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 15 | CBM Partners Corporation | Overland Park, KS 66221 | Oil Operator | Aug 2015 |
| 16 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2024 |
| 17 | Ceniza Petroleum, Inc. | Portland, TX 78374 | Oil & Gas Operator | Apr 2024 |
| 18 | Central Gulf Petroleum Inc | Conroe, TX 77304 | Oil & Gas Operator | Apr 2024 |
| 19 | Century Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 20 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 21 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 22 | Chaparral Natural Resources,Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 23 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2024 |
| 24 | Chase Energy, Inc. | Austin, TX 78763 | Oil & Gas Operator | Oct 2001 |
| 25 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 26 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 27 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 28 | Chief Petroleum Company | Dallas, TX 75244 | Oil & Gas Operator | Jul 1997 |
| 29 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 30 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Apr 2024 |
| 31 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2024 |
| 32 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 33 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 34 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 35 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Apr 2024 |
| 36 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 37 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 38 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 39 | Coastal Expanse Oil & Gas | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 40 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2024 |
| 41 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 42 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Apr 2024 |
| 43 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 44 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Apr 2024 |
| 45 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 46 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 47 | Cockburn Oil Corporation | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2005 |
| 48 | Coleville Petroleum Company | McAllen, TX 78503 | Oil & Gas Operator | Mar 1996 |
| 49 | Cometra Oil And Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |
| 50 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 51 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 52 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2024 |
| 53 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 54 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 55 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 56 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 57 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Apr 2024 |
| 58 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 59 | Crawford Energy Operating Co | Houston, TX 77056 | Oil & Gas Operator | Aug 2008 |
| 60 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 61 | Crest Engineering Services,Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2023 |
| 62 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 63 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 64 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 65 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2024 |
| 66 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 67 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Apr 2024 |
| 68 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 69 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |