| 1 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | May 2024 |
| 2 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2024 |
| 3 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 4 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2024 |
| 5 | Caprock Exploration, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Feb 2024 |
| 6 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | May 2024 |
| 7 | CGS Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2023 |
| 8 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2024 |
| 9 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 10 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2024 |
| 11 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2024 |
| 12 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 13 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 14 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 15 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2024 |
| 16 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 17 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 18 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 19 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 20 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 21 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2024 |
| 22 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jan 2024 |
| 23 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 24 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2024 |
| 25 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | May 2024 |
| 26 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 27 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 28 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 29 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 30 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 31 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 32 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 33 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 34 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 35 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | May 2024 |
| 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 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 39 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 40 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | May 2024 |
| 41 | Crockett Operting, LLC | Arlington, TX 76013 | Oil & Gas Operator | Oct 2020 |
| 42 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 43 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 44 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 45 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 46 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |