| 1 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Feb 2026 |
| 2 | C.F.O., Inc. | Liberty, TX 77575 | Oil Operator | Feb 2026 |
| 3 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 4 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Feb 2026 |
| 5 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 6 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 7 | Capco Offshore Of Texas, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 8 | Carbon Oil Inc | Vidor, TX 77670 | Oil & Gas Operator | Feb 2026 |
| 9 | Carpenter Corporation | Sourlake, TX 77659 | Oil & Gas Operator | Oct 1994 |
| 10 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 11 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 12 | Caspen Operating Company | Somerset, TX 78069 | Oil & Gas Operator | Mar 2008 |
| 13 | Cavalier Oil & Gas, Inc. | Buchanan Dam, TX 78609 | Oil & Gas Operator | Feb 2026 |
| 14 | Century Exploration Houston, Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2011 |
| 15 | Century Exploration Houston, LLC | Austin, TX 78702 | Oil & Gas Operator | Jan 2016 |
| 16 | Century Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 17 | CH4 Energy II LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2025 |
| 18 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 19 | Chenango Oil And Gas Co. | Groves, TX 77619 | Oil & Gas Operator | Feb 2026 |
| 20 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 21 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 22 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 23 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 24 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 25 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 26 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 27 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 28 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Feb 2026 |
| 29 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 30 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Feb 2026 |
| 31 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 32 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 33 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 34 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Feb 2026 |
| 35 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 36 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jan 2026 |
| 37 | Contour Energy E & P, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 38 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 39 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Feb 2026 |
| 40 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 41 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 42 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 43 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 44 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 45 | Crawford Energy Operating Co | Houston, TX 77056 | Oil & Gas Operator | Aug 2008 |
| 46 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2026 |
| 47 | Crebbs Oil Company | Batson, TX 77519 | Oil & Gas Operator | Jun 2024 |
| 48 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Feb 2026 |
| 49 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 50 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 51 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 52 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 53 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Feb 2026 |