| 1 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 2 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Feb 2026 |
| 3 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | Feb 2026 |
| 4 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Feb 2026 |
| 5 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 6 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 7 | Cardwell'S U Bar Oil | Manor, TX 78653 | Oil & Gas Operator | Feb 2026 |
| 8 | Carter Cattle & Crude Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 9 | Castillo Oil Company LLC | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 10 | Cavalier Oil & Gas, Inc. | Buchanan Dam, TX 78609 | Oil & Gas Operator | Feb 2026 |
| 11 | Centex Development | Giddings, TX 78942 | Oil & Gas Operator | Feb 2026 |
| 12 | Centex Pipe & Equipment, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 13 | Chalker Operating Inc. | Richmond, TX 77406 | Oil & Gas Operator | Jul 2016 |
| 14 | Challenger Oil Inc | San Antonio, TX 78209 | Gas Operator | Feb 2026 |
| 15 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 16 | Chaparral Natural Resources,Inc. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 17 | Cheatham Well Service, Inc. | Luling, TX 78648 | Oil Operator | Feb 2026 |
| 18 | Cheatham, Joe R. Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Dec 2018 |
| 19 | Cherry Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Dec 2000 |
| 20 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 21 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 22 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Feb 2026 |
| 23 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 24 | Click Energy Company | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 25 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 26 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 27 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 28 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 29 | Concord Energy, Inc. | Glen Rose, TX 76043 | Oil & Gas Operator | Feb 2026 |
| 30 | Cooke Energy Company | San Antonio, TX 78250 | Oil & Gas Operator | Jul 2012 |
| 31 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 32 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 33 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 34 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 35 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 36 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 37 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Feb 2026 |
| 38 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 39 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 40 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 41 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Feb 2026 |