| 1 | 3-C Oil Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Nov 2002 |
| 2 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 3 | 4J Energy LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 4 | 84 Energy LLC | Richmond, TX 77406 | Oil & Gas Operator | Apr 2024 |
| 5 | A & A Oil Company | Luling, TX 78648 | Oil & Gas Operator | Oct 2009 |
| 6 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Apr 2024 |
| 7 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 8 | Ahabb Oil | Luling, TX 78648 | Oil & Gas Operator | Dec 1998 |
| 9 | All In Energy Production, LLP | Red Rock, TX 78662 | Oil Operator | Apr 2024 |
| 10 | Allen & Grace Oil Company | Kingsbury, TX 78638 | Oil & Gas Operator | Jul 1997 |
| 11 | Allied Operating Texas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 12 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 13 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Apr 2024 |
| 14 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 15 | Arabie, Inc. | Lake Charles, LA 70605 | Oil & Gas Operator | Apr 2024 |
| 16 | Armidillo Oil Company | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 17 | Arnold Oil Properties LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 18 | Asante Operating Company, LLC | Austin, TX 78703 | Oil Operator | Apr 2024 |
| 19 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Apr 2024 |
| 20 | Austin Operating, LLC. | Chicago, IL 60622 | Oil Operator | Apr 2024 |
| 21 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 22 | Avian Tech International, Inc. | Euless, TX 76040 | Oil & Gas Operator | Apr 1995 |
| 23 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2024 |
| 24 | B H & C Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 25 | B-3 Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 26 | B. J. P. Operating | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 27 | B. M. J. Oil Venture | Luling, TX 78648 | Oil & Gas Operator | Jun 2005 |
| 28 | Bair'S Lease Service, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 29 | Base Petroleum | Houston, TX 77096 | Oil & Gas Operator | Jul 1994 |
| 30 | Bastrop Energy Group | San Antonio, TX 78231 | Oil & Gas Operator | Apr 2024 |
| 31 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 32 | BBC Production Company Inc. | Pottstown, PA 19464 | Oil Operator | Apr 2024 |
| 33 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 34 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 35 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 36 | Bennett Oil | Dale, TX 78616 | Oil & Gas Operator | Sep 2000 |
| 37 | Bennett, Patricia | Dale, TX 78616 | Oil & Gas Operator | Apr 2024 |
| 38 | Benson-Wyatt Oil Co. Inc. | Austin, TX 78767 | Oil & Gas Operator | Jul 2003 |
| 39 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 40 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | Jan 2024 |
| 41 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2024 |
| 42 | Blackmar, Jim Oil Operator | Luling, TX 78648 | Oil & Gas Operator | Jan 2021 |
| 43 | Blalack, James William | Schertz, TX 78154 | Oil & Gas Operator | Apr 2024 |
| 44 | Blue Ridge Oil & Gas Exp., Inc. | Belleville, MI 48111 | Gas Operator | Jul 1994 |
| 45 | Bluebonnet Exploration Company | New Braunfels, TX 78130 | Oil & Gas Operator | Apr 2018 |
| 46 | Bob-Kat Oil Co. | Prairie Lea, TX 78661 | Oil & Gas Operator | Apr 2024 |
| 47 | Bollman & Bailey | Luling, TX 78648 | Oil & Gas Operator | Oct 2010 |
| 48 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 49 | Bruington Operating, L.L.C. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2015 |
| 50 | Brushy Creek Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 51 | Bubba Lynn Crude | San Marcos, TX 78666 | Oil Operator | Apr 2024 |
| 52 | Buffalo Resources Co. | Rosenberg, TX 77471 | Oil & Gas Operator | Sep 2000 |
| 53 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 54 | Bush, Mark A. Oil And Gas Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 55 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 56 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 57 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | Apr 2024 |
| 58 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 59 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 60 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 61 | Cardwell'S U Bar Oil | Manor, TX 78653 | Oil & Gas Operator | Apr 2024 |
| 62 | Carter Cattle & Crude Company | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 63 | Castillo Oil Company LLC | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 64 | Cavalier Oil & Gas, Inc. | Buchanan Dam, TX 78609 | Oil & Gas Operator | Apr 2024 |
| 65 | Centex Pipe & Equipment, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 66 | Chalker Operating Inc. | Richmond, TX 77406 | Oil & Gas Operator | Jul 2016 |
| 67 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 68 | Chaparral Natural Resources,Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 69 | Cheatham Well Service, Inc. | Luling, TX 78648 | Oil Operator | Apr 2024 |
| 70 | Cheatham, Joe R. Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Dec 2018 |
| 71 | Cherry Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Dec 2000 |
| 72 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 73 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 74 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 75 | Click Energy Company | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 76 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 77 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 78 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 79 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 80 | Concord Energy, Inc. | Glen Rose, TX 76043 | Oil & Gas Operator | Apr 2024 |
| 81 | Cooke Energy Company | San Antonio, TX 78250 | Oil & Gas Operator | Jul 2012 |
| 82 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 83 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Apr 2024 |
| 84 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 85 | Covalent Exploration Incorporated | Houston, TX 77079 | Oil Operator | Apr 2024 |
| 86 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 87 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 88 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Apr 2024 |
| 89 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 90 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 91 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 92 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Apr 2024 |
| 93 | D & J Investments | Luling, TX 78648 | Oil Operator | Dec 2009 |
| 94 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 95 | Darst Creek Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Mar 2021 |
| 96 | Davenport Oil Company | Luling, TX 78648 | Oil & Gas Operator | Dec 1996 |
| 97 | Daystar Operating Company, LLC | Austin, TX 78750 | Oil & Gas Operator | Apr 2008 |
| 98 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 99 | Dirks, R.W. Pet. Eng. Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Jul 1999 |
| 100 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Apr 2024 |