| 1 | C Oil Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2017 |
| 2 | Callon Permian II, LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2024 |
| 3 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 4 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 5 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 6 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 7 | Cex Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 8 | Chance Properties Co. | Kermit, TX 79745 | Oil & Gas Operator | Oct 2025 |
| 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 | Oct 2025 |
| 11 | Chapman, Ford Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jan 1996 |
| 12 | Chase Avenue Corporation, The | Dallas, TX 75219 | Oil & Gas Operator | Jun 2003 |
| 13 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 14 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 15 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 16 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 17 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 18 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Oct 2025 |
| 19 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 20 | Civitas Permian Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 21 | Claude-Maggie Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 22 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 23 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Oct 2025 |
| 24 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 25 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 26 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 27 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 28 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 29 | COG Production LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2025 |
| 30 | Colgate Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 31 | Concho Oil & Gas Corp. | Midland, TX 79701 | Oil & Gas Operator | May 2003 |
| 32 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 33 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 34 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 35 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 36 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 37 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Oct 2025 |
| 38 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2025 |
| 39 | Cook, Kenneth D. Operator | Midland, TX 79707 | Oil Operator | Oct 2025 |
| 40 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 41 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 42 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 43 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 44 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 45 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Oct 2025 |
| 46 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 47 | CPX Energy Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2025 |
| 48 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 49 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 50 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 51 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |