| 1 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 2 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 3 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2024 |
| 4 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 5 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Nov 2024 |
| 6 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 7 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 8 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 9 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 10 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 11 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Nov 2024 |
| 12 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Nov 2024 |
| 13 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 14 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 15 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2024 |
| 16 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |