| 1 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 2 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 3 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 4 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 5 | Canyon Operating Unit | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 6 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 7 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 8 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Mar 2025 |
| 9 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 10 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Mar 2025 |
| 11 | Centerfire Resources | Springerville, AZ 85938 | Oil & Gas Operator | Mar 2025 |
| 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 Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 15 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 16 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 17 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Mar 2025 |
| 18 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 19 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 20 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2025 |
| 21 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 22 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 23 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 24 | Clifton, Joe B. Exploration, Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | Mar 2008 |
| 25 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Mar 2025 |
| 26 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 27 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 28 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 29 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 30 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Mar 2025 |
| 31 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 32 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2025 |
| 33 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Mar 2025 |
| 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 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Mar 2025 |
| 38 | Crest Operating Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 39 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 40 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |