| 1 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 2 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Dec 2025 |
| 3 | Cal-Tex Fossil, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 4 | Callarman, David | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 5 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 6 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |
| 7 | Caraway, Robert R. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 8 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Nov 2025 |
| 9 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Dec 2025 |
| 10 | Carter Energy Corporation | Duncanville, TX 75138 | Oil & Gas Operator | Sep 2010 |
| 11 | Castle Gas Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Oct 2014 |
| 12 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Dec 2025 |
| 13 | CDJ Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 14 | CDJ Oil Company, LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 15 | CDX Gas, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2009 |
| 16 | Cegx Of Texas LLC | Eastland, TX 76448 | Oil Operator | Mar 2018 |
| 17 | Central Basin Oil Inv. Inc. | Southlake, TX 76092 | Oil & Gas Operator | Dec 2025 |
| 18 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 19 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 20 | Chapparal Operating Co. | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2025 |
| 21 | Chenoweth, Grover | Marble Falls, TX 78654 | Oil & Gas Operator | Dec 2024 |
| 22 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 23 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 24 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 25 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 26 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 27 | Cisco Production Company, LLC | Victoria, TX 77902 | Oil & Gas Operator | May 2012 |
| 28 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 29 | Clark, B. C. | Cross Plains, TX 76443 | Oil Operator | Dec 2007 |
| 30 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2025 |
| 31 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 32 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 33 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 34 | Comyn Natural Gas, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | Dec 2025 |
| 35 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 36 | Cone & Petree Oil & Gas Exp. Inc | Lubbock, TX 79453 | Oil & Gas Operator | May 2024 |
| 37 | Conquistador Petroleum,Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 38 | Continental U.S. Management Corp | Dallas, TX 75240 | Oil & Gas Operator | Oct 2016 |
| 39 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 40 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 41 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Dec 2025 |
| 42 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 43 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 44 | Crimson Energy Company, LC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2004 |
| 45 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 46 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Dec 2025 |
| 47 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 48 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Dec 2025 |
| 49 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Dec 2025 |
| 50 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 51 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |