| 1 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 2 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Aug 2025 |
| 3 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Dec 2025 |
| 4 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 5 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 6 | Caminar Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Aug 2024 |
| 7 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 8 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 9 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Dec 2025 |
| 10 | Carroll Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2022 |
| 11 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Oct 2025 |
| 12 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 13 | CB Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2017 |
| 14 | CCF, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Apr 1998 |
| 15 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 16 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 17 | Centurion Oil & Gas Op. Co. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1998 |
| 18 | Chalmers Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 1997 |
| 19 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 20 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 21 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Dec 2025 |
| 22 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 23 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 24 | Charter Petroleum Company | Abilene, TX 79605 | Oil & Gas Operator | Dec 2025 |
| 25 | Chase Operating Company | Abilene, TX 79608 | Oil & Gas Operator | Feb 2016 |
| 26 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 27 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 28 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 29 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 30 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 31 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 32 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 33 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 34 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 35 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2025 |
| 36 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 37 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 38 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 39 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 40 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 41 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 42 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 43 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 44 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 45 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 46 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Dec 2025 |
| 47 | Craruth Energy Corporation | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 48 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 49 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Dec 2025 |
| 50 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 51 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 52 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |