| 1 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 2 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 3 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 4 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 5 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 6 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 7 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 8 | Cazar Energy Inc | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 9 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 10 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 11 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2025 |
| 12 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 13 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Oct 2025 |
| 14 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Oct 2025 |
| 15 | Circle C Operations | Winnsboro, TX 75494 | Oil Operator | Oct 2025 |
| 16 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 17 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 18 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 19 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 20 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Oct 2025 |
| 21 | Conquest Energy, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 22 | Cook Exploration Co. | Longview, TX 75602 | Oil & Gas Operator | Oct 2025 |
| 23 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Oct 2025 |
| 24 | Crisis Oil Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 1995 |
| 25 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 26 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 27 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 28 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 29 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 30 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 31 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Oct 2025 |