| 1 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 2 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Nov 2025 |
| 3 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Nov 2025 |
| 4 | Candelero Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 5 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | Nov 2025 |
| 6 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 7 | Carson Buckles Exploration LLC | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 8 | Catoilan Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 9 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 10 | Centerfire Resources | Springerville, AZ 85938 | Oil & Gas Operator | Nov 2025 |
| 11 | Central Resources, Inc. | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 12 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2025 |
| 13 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2025 |
| 14 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 15 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Nov 2025 |
| 16 | Chevron Pipe Line Company | Houston, TX 77001 | Oil Operator | Feb 2015 |
| 17 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2025 |
| 18 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Nov 2025 |
| 19 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Nov 2025 |
| 20 | Civitas Permian Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2025 |
| 21 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Nov 2025 |
| 22 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 23 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 24 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 25 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 26 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 27 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 28 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 29 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 30 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 31 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2025 |
| 32 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 33 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 34 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 35 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Nov 2025 |
| 36 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Nov 2025 |
| 37 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Nov 2025 |
| 38 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 39 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 40 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 41 | CR3 Operating Company, L.L.C. | Houston, TX 77251 | Oil & Gas Operator | Nov 2025 |
| 42 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 43 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2025 |