| 1 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 2 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Oct 2025 |
| 3 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 4 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 5 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 6 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Oct 2025 |
| 7 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 8 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 9 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2025 |
| 10 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 11 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 12 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 13 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 14 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Oct 2025 |
| 15 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 16 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 17 | Civitas Permian Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 18 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 19 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 20 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2025 |
| 21 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 22 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 23 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 24 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 25 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 26 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Oct 2025 |
| 27 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 28 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 29 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 30 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 31 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 32 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 33 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 34 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 35 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 36 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 37 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 38 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 39 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 40 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 41 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 42 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |