| 1 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 2 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Oct 2025 |
| 3 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 4 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 5 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 6 | Centurion Oil & Gas Op. Co. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1998 |
| 7 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Jun 2025 |
| 8 | Chanze Oil Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 9 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 10 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 11 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 12 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 13 | CLS Petroleum Holdings LLC | Iowa Park, TX 76367 | Oil Operator | Oct 2025 |
| 14 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 15 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 16 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 17 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 18 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 19 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Oct 2025 |
| 20 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 21 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 22 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Oct 2025 |
| 23 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 24 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 25 | Crampton, Freddie | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 26 | Cranford, Wayne | Electra, TX 76360 | Oil & Gas Operator | Dec 2019 |
| 27 | Crawford Energy, Incorporated | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 28 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 29 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Oct 2025 |