| 1 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 2 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Jan 2024 |
| 3 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 4 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 5 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 6 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 7 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 8 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 9 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 10 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 11 | Cone & Petree Oil & Gas Exp. Inc | Lubbock, TX 79453 | Oil & Gas Operator | Apr 2024 |
| 12 | Cone, S. E. Jr. | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2002 |
| 13 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 14 | Conquest Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2024 |
| 15 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2024 |
| 16 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 17 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 18 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |