| 1 | Cal-Tex Fossil, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 3 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 4 | Canyon Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 5 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 6 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 7 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 8 | Carter Energy Corporation | Duncanville, TX 75138 | Oil & Gas Operator | Sep 2010 |
| 9 | Cary Oil & Gas, Inc | Decatur, TX 76234 | Oil & Gas Operator | Jun 2025 |
| 10 | Case Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 11 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 12 | Caswell Bros. Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2025 |
| 13 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Jun 2025 |
| 14 | Century Petroleum, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2025 |
| 15 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Mar 2025 |
| 16 | Chanze Oil Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 17 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2025 |
| 18 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 19 | Chico Production Corp. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2025 |
| 20 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 21 | Chiodo Corp. | San Antonio, TX 78232 | Oil & Gas Operator | Jun 2025 |
| 22 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 23 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 24 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Jun 2025 |
| 25 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 26 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 27 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 28 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Jun 2025 |
| 29 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 30 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Jun 2025 |
| 31 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 32 | Continental Export Corporation | Bowie, TX 76230 | Oil & Gas Operator | Sep 2013 |
| 33 | Cooke & Montague Oper. Co., Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | Jun 2025 |
| 34 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2025 |
| 35 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2025 |
| 36 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 37 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 38 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 39 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2025 |
| 40 | Crest Operating Company | Houston, TX 77042 | Oil & Gas Operator | Jun 2025 |
| 41 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Jun 2025 |
| 42 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 43 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 44 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 45 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 46 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Jun 2025 |
| 47 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Jun 2025 |
| 48 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2025 |
| 49 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |