| 30001 | Tex-Lee Operating Company | Giddings, TX 78942 | Oil & Gas Operator | Feb 2026 |
| 30002 | Tex-Oak, Inc. | Oklahoma City, OK 73155 | Oil & Gas Operator | Dec 1995 |
| 30003 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Dec 2025 |
| 30004 | Tex-Ok Energy, LTD Partnership | Cody, WY 82414 | Oil & Gas Operator | Feb 2026 |
| 30005 | Tex-R Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2021 |
| 30006 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 30007 | Tex-Well Oil & Gas Corp. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 30008 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 30009 | Texacal, Inc. | Newport Beach, CA 92660 | Oil & Gas Operator | Feb 2026 |
| 30010 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Feb 2026 |
| 30011 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 30012 | Texaco Exploration & Prod | Midland, TX 79702 | Oil & Gas Operator | Aug 2002 |
| 30013 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 30014 | Texaco Exploration & Production Inc N W | Farmington, NM 87401 | Oil & Gas Operator | Aug 1995 |
| 30015 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 30016 | Texaco Inc & A.C. Glassell Jr | | Oil & Gas Operator | Aug 1980 |
| 30017 | Texaco Oils Inc | Tulsa, OK 74102-2420 | Oil & Gas Operator | Jan 2003 |
| 30018 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 30019 | Texaco Seaboard, Inc. | | Gas Operator | Sep 1980 |
| 30020 | Texaco USA - Mor | | Oil Operator | Aug 1988 |
| 30021 | Texada Resources, Inc. | | Oil & Gas Operator | Dec 1992 |
| 30022 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 30023 | Texakoma Exploration & Production LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 30024 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 30025 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 30026 | Texakoma Opr LP | Plano, TX 75024-6679 | Oil & Gas Operator | Dec 2012 |
| 30027 | Texakota | | Oil & Gas Operator | Mar 1995 |
| 30028 | Texakota, Inc. | Houston, TX 77098 | Oil & Gas Operator | Mar 2021 |
| 30029 | Texalta Oil And Gas Inc. | | Gas Operator | Dec 1990 |
| 30030 | Texan Petroleum Corporation | Dallas, TX 75204 | Oil & Gas Operator | Oct 2004 |
| 30031 | Texan Production | Pearsall, TX 78061 | Oil & Gas Operator | Aug 2003 |
| 30032 | Texan Production Company, Inc. | Canyon Lake, TX 78133 | Oil & Gas Operator | Feb 2026 |
| 30033 | Texana Operating Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2026 |
| 30034 | Texas American Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 30035 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 30036 | Texas City Refining, Inc. | | Oil & Gas Operator | Nov 1988 |
| 30037 | Texas Coastal Resources LLC | Fairhope, AL 36532 | Oil Operator | Feb 2026 |
| 30038 | Texas Concho Operating Co. | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1999 |
| 30039 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Feb 2026 |
| 30040 | Texas Crude & Dale Gas Expl | | Oil & Gas Operator | Dec 1984 |
| 30041 | Texas Crude Energy, Inc. | Houston, TX 77256 | Oil & Gas Operator | Oct 2012 |
| 30042 | Texas Crude Exploration Inc | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 30043 | Texas Crude Oil Co. | | Oil & Gas Operator | Dec 1984 |
| 30044 | Texas Crude Oil Co. Et Al | | Oil & Gas Operator | May 1992 |
| 30045 | Texas Crude Oil, Inc. | | Oil & Gas Operator | Dec 1984 |
| 30046 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 30047 | Texas Crude, Inc. | Houston, TX 77256 | Oil & Gas Operator | Oct 1995 |
| 30048 | Texas Crude-Rebstock & Reeves | | Oil & Gas Operator | Feb 1980 |
| 30049 | Texas Crude-Wainoco-Hilliard | | Oil & Gas Operator | Jul 1978 |
| 30050 | Texas Eastern Skyline Oil | Houston, TX 77252 | Oil & Gas Operator | Jan 1987 |
| 30051 | Texas Eastern Skyline Oil Co. | | Oil & Gas Operator | Jan 1987 |
| 30052 | Texas Eastern Transm. Corp. | | Oil & Gas Operator | Dec 2002 |
| 30053 | Texas Energen Inc. | Austin, TX 78731 | Oil & Gas Operator | Feb 2026 |
| 30054 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 30055 | Texas Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 30056 | Texas Energy & Environmental | Houston, TX 77070 | Oil & Gas Operator | Nov 1998 |
| 30057 | Texas Energy & Environmental Inc | Houston, TX 77269 | Oil & Gas Operator | Oct 1998 |
| 30058 | Texas Energy Associates | Graham, TX 76450 | Oil & Gas Operator | Nov 1999 |
| 30059 | Texas Energy Mutual LLC | Grapevine, TX 76051-8145 | Oil Operator | Jun 2018 |
| 30060 | Texas Energy Oil & Gas Corp. | | Oil & Gas Operator | Sep 1982 |
| 30061 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 30062 | Texas Energy Reserves, Inc | New Braunfels, TX 78130 | Oil & Gas Operator | Jun 1996 |
| 30063 | Texas Energy Sources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 30064 | Texas Energy Trust Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2016 |
| 30065 | Texas Exploration & Prod. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 1996 |
| 30066 | Texas Fuel Company | Galveston, TX 77550 | Oil & Gas Operator | Feb 2026 |
| 30067 | Texas Gas Exploration Corp. | | Oil & Gas Operator | Nov 1986 |
| 30068 | Texas Gas Resources, Inc. | Houston, TX 77292 | Oil & Gas Operator | Jul 2009 |
| 30069 | Texas Gas Transmission Corp. | | Oil Operator | Aug 2003 |
| 30070 | Texas Gas Transmission, LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 30071 | Texas General Petroleum Corp | | Oil & Gas Operator | Aug 1984 |
| 30072 | Texas Green Energy Services LLC | Richmond, TX 77407 | Oil Operator | Feb 2026 |
| 30073 | Texas Gulf Gas Corporation | Fayetteville, TX 78940 | Oil & Gas Operator | Jun 2005 |
| 30074 | Texas Gulf Production Co. LLC | Houston, TX 77227 | Oil & Gas Operator | Feb 2026 |
| 30075 | Texas Hydrogen Energy Corp. | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 30076 | Texas Ind. Exploration, Inc. | | Oil & Gas Operator | Oct 2001 |
| 30077 | Texas Independent Explor LTD. | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 30078 | Texas Independent Explor., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 30079 | Texas Independent Exploration LP | Houston, TX 77024 | Oil & Gas Operator | Mar 2017 |
| 30080 | Texas Independent Oil Co., LLC | Argyle, TX 76226 | Oil & Gas Operator | Feb 2026 |
| 30081 | Texas International Oper., LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2013 |
| 30082 | Texas International Resource LLC | Allen, TX 75013 | Oil Operator | Feb 2026 |
| 30083 | Texas Investments | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 30084 | Texas Keystone Inc | Oakmont, PA 15139-2072 | Oil & Gas Operator | Nov 2017 |
| 30085 | Texas Land & Petro Co., LLC | Carrollton, TX 75010 | Oil & Gas Operator | Feb 2026 |
| 30086 | Texas Land & Trading Co, Inc. | Austin, TX 78734 | Oil & Gas Operator | Mar 2008 |
| 30087 | Texas Lone Star Petroleum Corp. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2013 |
| 30088 | Texas M.O.R., Inc. | Corsicana, TX 75109 | Oil Operator | Sep 2013 |
| 30089 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 30090 | Texas Meridian Res. Expl., Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1998 |
| 30091 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 30092 | Texas Moran Exploration Company | Houston, TX 77098 | Oil & Gas Operator | Jun 2023 |
| 30093 | Texas Offshore Operations, LLC | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Feb 2026 |
| 30094 | Texas Oil & Gas | Denver, CO 80264 | Oil & Gas Operator | Oct 1981 |
| 30095 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 30096 | Texas Oil And Gas Operating, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Feb 2026 |
| 30097 | Texas Oil Company, The | Houston, TX 77018 | Oil & Gas Operator | Aug 2006 |
| 30098 | Texas Oil Resources Oper, LLC | Houston, TX 77024 | Oil Operator | Feb 2026 |
| 30099 | Texas Onshore Energy, Inc. | Austin, TX 78704 | Oil & Gas Operator | Feb 2026 |
| 30100 | Texas Operating & Consult., LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2018 |