| 1 | Cal-Tex Operating Co. | Manchaca, TX 78652 | Oil & Gas Operator | May 2020 |
| 2 | Calima Energy LLC | Electra, TX 76360 | Oil Operator | Oct 2025 |
| 3 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 4 | Canyon Ridge Energy LLC | Iowa Park, TX 76367 | Oil Operator | Nov 2024 |
| 5 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 6 | Cardinal Energy Company | Rowlett, TX 75088 | Oil & Gas Operator | Feb 2026 |
| 7 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 8 | Caribou Operating, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 9 | Carroll, Alvis J. | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 10 | Case Oil | Burkburnett, TX 76354 | Oil & Gas Operator | Feb 2026 |
| 11 | Case, C. W. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 12 | Catlin Drilling Company | Iowa Park, TX 76367 | Oil & Gas Operator | Aug 2003 |
| 13 | Catlin, Carl | Jacksboro, TX 76458 | Oil & Gas Operator | Mar 2008 |
| 14 | Catlin, Delbert | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 15 | Catlin, Randy | Iowa Park, TX 76367 | Oil Operator | Feb 2026 |
| 16 | Centurion Oil & Gas Op. Co. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1998 |
| 17 | Century Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 18 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Feb 2026 |
| 19 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Nov 2025 |
| 20 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 21 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 22 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 23 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 24 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 25 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 26 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 27 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 28 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 29 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 30 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 31 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 32 | Collier Oil Field Services Inc | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 33 | Collier, Scott Inc. | Holliday, TX 76366 | Oil Operator | May 2003 |
| 34 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 35 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 36 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 37 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 38 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 39 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 40 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 41 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 42 | Craighead, Ray | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 43 | Craighead, Ray Well Service Inc | Wichita Falls, TX 76308 | Oil Operator | Apr 2019 |
| 44 | Craighead, Robert A. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 45 | Crampton, Freddie | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 46 | Cranford, Wayne | Electra, TX 76360 | Oil & Gas Operator | Dec 2019 |
| 47 | Crawford Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2001 |
| 48 | Crenshaw Oil | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2026 |
| 49 | Crenshaw, Joe R. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 50 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 51 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 52 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2026 |
| 53 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 54 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 55 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |
| 56 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Feb 2026 |