| 1 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2024 |
| 2 | Carson Buckles Exploration LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 3 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 4 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 5 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 6 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 7 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 8 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 9 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 10 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 11 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 12 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 13 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2024 |
| 14 | Craig, Wood B. & Bettie | Sunray, TX 79086 | Oil & Gas Operator | Aug 2005 |
| 15 | Crain Minerals LLC | Nichols Hills, OK 73120 | Oil & Gas Operator | Aug 2014 |
| 16 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 17 | Crescendo Resources L P | Amarillo, TX 79188 | Oil & Gas Operator | Jan 2024 |
| 18 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 19 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |
| 20 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |