| 1 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 2 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 3 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Mar 2025 |
| 4 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 5 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Mar 2025 |
| 6 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 7 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 8 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Mar 2025 |
| 9 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 10 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 11 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 12 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 13 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 14 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 15 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 16 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 17 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 18 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 19 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 20 | Cheyenne Minerals, Inc. | Houston, TX 77030 | Oil & Gas Operator | Jun 2001 |
| 21 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 22 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Mar 2025 |
| 23 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 24 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Mar 2025 |
| 25 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 26 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Mar 2025 |
| 27 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Mar 2025 |
| 28 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 29 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 30 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 31 | Contrast Energy, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2025 |
| 32 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 33 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 34 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 35 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 36 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 37 | Covey Park Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2019 |
| 38 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 39 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 40 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 41 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 42 | Crestridge DRLG. & Prod.Co.,LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 43 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 44 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |