| 1 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 2 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Apr 2024 |
| 3 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2024 |
| 4 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 5 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 6 | Capstone Natural Res II, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 7 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 8 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Dec 2023 |
| 9 | Casper Oil & Gas | Bandera, TX 78003 | Oil & Gas Operator | Oct 2002 |
| 10 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 11 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 12 | Century Oil Company Inc | Troy, MI 48098 | Oil Operator | Dec 2022 |
| 13 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 14 | Cherokee DRLG. & Dev. Corp. | Winnetka, IL 60093 | Oil & Gas Operator | Jan 2003 |
| 15 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 16 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 17 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 18 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 19 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 20 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Apr 2024 |
| 21 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 22 | Civitas Permian Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 23 | Clayton Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2004 |
| 24 | CLR Secondary Recovery, LLC | Mabank, TX 75147 | Oil & Gas Operator | Apr 2024 |
| 25 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 26 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 27 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 28 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 29 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 30 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 31 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 32 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 33 | Coleville Petroleum Company | McAllen, TX 78503 | Oil & Gas Operator | Mar 1996 |
| 34 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 35 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 36 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 37 | Contango Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 38 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 39 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 40 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2024 |
| 41 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 42 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 43 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 44 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 45 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 46 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 47 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 48 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |