| 1 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Apr 2024 |
| 2 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 3 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 4 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 5 | Callaway Production Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 6 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2024 |
| 7 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Apr 2024 |
| 8 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 9 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | Apr 2024 |
| 10 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 11 | Cesinger Exploration Service, In | Dallas, TX 75208 | Oil & Gas Operator | Mar 2006 |
| 12 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 13 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 14 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 15 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 16 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 17 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 18 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 19 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 20 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 21 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 22 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 23 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 24 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 25 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 26 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 27 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 28 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 29 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 30 | Cooper Oil & Gas, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 31 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 32 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 33 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 34 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 35 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 36 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 37 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |
| 38 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |