| 1 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Oct 2025 |
| 2 | Cab Resources, LLC | Odessa, TX 79762 | Oil Operator | Oct 2025 |
| 3 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 4 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Oct 2025 |
| 5 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 6 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 7 | Carpenter Services | Colorado City, TX 79512 | Oil & Gas Operator | May 1996 |
| 8 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Oct 2025 |
| 9 | Cedar Bend Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Oct 2025 |
| 10 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 11 | Chalk, Otis, Estate | Big Spring, TX 79721 | Oil & Gas Operator | Jan 2006 |
| 12 | Chambers Operating, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2006 |
| 13 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 14 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Oct 2025 |
| 15 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Oct 2025 |
| 16 | Chandler & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | May 1997 |
| 17 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 18 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2025 |
| 19 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 20 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 21 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 22 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 23 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 24 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 25 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 26 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 27 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Oct 2025 |
| 28 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 29 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 30 | Compass Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 31 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 32 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Oct 2025 |
| 33 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 34 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 35 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 36 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 37 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 38 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 39 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 40 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 41 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Oct 2025 |
| 42 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil Operator | Oct 2025 |
| 43 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 44 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |