| 1 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 2 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 3 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Sep 2026 |
| 4 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2026 |
| 5 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 6 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Sep 2026 |
| 7 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 8 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 9 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | Sep 2026 |
| 10 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 11 | Carol-Holly Oil Corporation | Denver, CO 80237 | Oil & Gas Operator | Jul 2026 |
| 12 | Carpenter Services | Colorado City, TX 79512 | Oil & Gas Operator | May 1996 |
| 13 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2026 |
| 14 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Sep 2026 |
| 15 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Jul 2026 |
| 16 | Cazador Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 17 | CB Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2017 |
| 18 | Cedar Bend Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Sep 2026 |
| 19 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 20 | Chalk, Otis, Estate | Big Spring, TX 79721 | Oil & Gas Operator | Jan 2006 |
| 21 | Chambers Operating, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2006 |
| 22 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jun 2026 |
| 23 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2026 |
| 24 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 25 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 26 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Sep 2026 |
| 27 | Chisum Resources | Shallowater, TX 79363 | Oil Operator | Sep 2026 |
| 28 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Sep 2026 |
| 29 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 30 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 31 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 32 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Sep 2026 |
| 33 | CMR Oil, LLC | McKinney, TX 75072 | Oil Operator | Sep 2026 |
| 34 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 35 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 36 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2026 |
| 37 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Sep 2026 |
| 38 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 39 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 40 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 41 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 42 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 43 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 44 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 45 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Feb 2026 |
| 46 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil & Gas Operator | Sep 2026 |
| 47 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 48 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Sep 2026 |