| 1 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Feb 2026 |
| 2 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 3 | Caribbean Energy LLC II | Cotulla, TX 78014 | Oil & Gas Operator | Feb 2026 |
| 4 | Cascade Petroleum Corporation | Quitman, TX 75783 | Oil & Gas Operator | Mar 2002 |
| 5 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Dec 2025 |
| 6 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | Feb 2026 |
| 7 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 8 | Charis Oil & Gas, LLC | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 9 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 10 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 11 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 12 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 13 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Feb 2026 |
| 14 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 15 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 16 | Continental Export Corporation | Bowie, TX 76230 | Oil & Gas Operator | Sep 2013 |
| 17 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 18 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Feb 2026 |
| 19 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 20 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 21 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 22 | Crisis Oil Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 1995 |
| 23 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 24 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 25 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |