| 1 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 2 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 3 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 4 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2024 |
| 5 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 6 | Carroll Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2022 |
| 7 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
| 8 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 9 | CCV, Inc. | Houston, TX 77019 | Oil & Gas Operator | Sep 1994 |
| 10 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Mar 2025 |
| 11 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 12 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 13 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 14 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 15 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Mar 2025 |
| 16 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 17 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 18 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 19 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Mar 2025 |
| 20 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 21 | CMR Oil, LLC | McKinney, TX 75072 | Oil Operator | Mar 2025 |
| 22 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 23 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 24 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 25 | Concord Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2021 |
| 26 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 27 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 28 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Mar 2025 |
| 29 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 30 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 31 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 32 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Mar 2025 |
| 33 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 34 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Mar 2025 |
| 35 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Mar 2025 |
| 36 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 37 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 38 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |