| 1 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Oct 2025 |
| 2 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 3 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Oct 2025 |
| 4 | Canan Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 5 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 6 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 7 | Carroll, Alvis J. | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 8 | Carter Energy Corporation | Duncanville, TX 75138 | Oil & Gas Operator | Sep 2010 |
| 9 | Cary Oil & Gas, Inc | Decatur, TX 76234 | Oil & Gas Operator | Oct 2025 |
| 10 | Case, C. W. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 11 | Caswell Bros. Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2025 |
| 12 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 13 | Century Petroleum, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 14 | Chasla Energy, LLC | Iowa Park, TX 76367 | Oil Operator | Oct 2025 |
| 15 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 16 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 17 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 18 | Clark Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 19 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Oct 2025 |
| 20 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 21 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 22 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 23 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 24 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 25 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 26 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 27 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 28 | Continental Export Corporation | Bowie, TX 76230 | Oil & Gas Operator | Sep 2013 |
| 29 | Cooke & Montague Oper. Co., Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | Oct 2025 |
| 30 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 31 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 32 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 33 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 34 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 35 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 36 | CP Exploration TX Operating LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2017 |
| 37 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 38 | Crest Operating Company | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 39 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 40 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Oct 2025 |
| 41 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 42 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Oct 2025 |
| 43 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |