| 1 | C&P Resources Operating Co,LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 2 | Cabeza Oil And Gas, LLC | Austin, CO 81410 | Oil & Gas Operator | Mar 2022 |
| 3 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Feb 2026 |
| 4 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 5 | Central Plains Oil&Gas Corp. (A) | Bryan, TX 77802 | Oil & Gas Operator | Mar 2003 |
| 6 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Dec 2025 |
| 7 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 8 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 9 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 10 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 11 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Feb 2026 |
| 12 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Feb 2026 |
| 13 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Feb 2026 |
| 14 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 15 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Feb 2026 |
| 16 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Feb 2026 |
| 17 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Nov 2025 |
| 18 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 19 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 20 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 21 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 22 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 23 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2025 |
| 24 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 25 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 26 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 27 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 28 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 29 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 30 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 31 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 32 | Crawford Energy, Incorporated | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 33 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2026 |
| 34 | Creative Oil & Gas Operating,LLC | Giddings, TX 78942 | Oil & Gas Operator | May 2024 |
| 35 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 36 | Crimson Energy Company, LC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2004 |
| 37 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 38 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 39 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 40 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Feb 2026 |
| 41 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 42 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |