| 29901 | Trans Atlantic Ener Corp | Caldwell, OH 43724 | Oil & Gas Operator | Dec 1993 |
| 29902 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 29903 | Trans Energy, Inc. | St. Marys, WV 26170 | Oil & Gas Operator | Dec 2017 |
| 29904 | Trans Ocean Oil, Inc. | Houston, TX 77252 | Oil & Gas Operator | Sep 1980 |
| 29905 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 29906 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 29907 | Trans Resource D | | Oil Operator | May 1991 |
| 29908 | Trans Terra Corp Int'L | Amarillo, TX 79159-0370 | Oil & Gas Operator | Jul 1993 |
| 29909 | Trans Terra Corp., International | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2009 |
| 29910 | Trans Texas Minerals Company | Austin, TX 78714 | Oil & Gas Operator | Aug 1999 |
| 29911 | Trans-Gulf Petroleum Corp | | Oil & Gas Operator | Sep 1999 |
| 29912 | Trans-Pacific Oil & Gas Inc. | | Oil & Gas Operator | Mar 1982 |
| 29913 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 29914 | Trans-Sabine Pipeline Corp | | Oil Operator | Mar 2009 |
| 29915 | Trans-Tex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Jun 2025 |
| 29916 | Trans-Texas Energy Group LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2015 |
| 29917 | Trans-Texas Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 1993 |
| 29918 | Trans-Western Expl. Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 1993 |
| 29919 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Aug 2024 |
| 29920 | Transamer Petro Corp | Pittsburgh, PA 15222-3510 | Gas Operator | Dec 1985 |
| 29921 | Transamerica Energy Corp. | Atlanta, GA 30356 | Oil & Gas Operator | Jun 2025 |
| 29922 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 29923 | Transamerica Oil Corporation | Hutchinson, KS 67504 | Gas Operator | Feb 2025 |
| 29924 | Transamerican Energy LTD | Dallas, TX 75231-1075 | Oil & Gas Operator | Apr 2014 |
| 29925 | Transamerican Energy/Toce Oil | | Oil & Gas Operator | Dec 1994 |
| 29926 | Transamerican Natural Gas Corp. | Houston, TX 77032 | Oil & Gas Operator | Aug 2000 |
| 29927 | Transamerican-Swepi-Toce Oil | | Oil & Gas Operator | Apr 1990 |
| 29928 | Transatlantic Expl LTD Dba Ravenna Oil | Beattyville, KY 41311 | Oil Operator | Dec 2023 |
| 29929 | Transatlantic Petr (USA) Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 29930 | Transco Exploration Company | | Oil & Gas Operator | Jul 1989 |
| 29931 | Transco Oil & Gas Inc. | | Gas Operator | Dec 1992 |
| 29932 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 29933 | Transcontinental Company | Haltom City, TX 76148-4122 | Oil & Gas Operator | Mar 2025 |
| 29934 | Transcontinental Gas P/L Corp. | | Oil & Gas Operator | Dec 2009 |
| 29935 | Transcontinental Gas Pipeline Co LLC | | Oil Operator | Jan 2025 |
| 29936 | Transcontinental Minerals Corp. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2008 |
| 29937 | Transcontinental Oil & Gas Inc | Aurora, OH 44202 | Oil & Gas Operator | Dec 2024 |
| 29938 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 29939 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |
| 29940 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 29941 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 29942 | Transhorizon Energy Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2023 |
| 29943 | Transit Energy Inc | North Lawrence, OH 44666 | Oil & Gas Operator | Dec 2024 |
| 29944 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Jun 2025 |
| 29945 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 29946 | Transpac Petroleum Inc. | | Oil & Gas Operator | Dec 1995 |
| 29947 | Transpacific Energy, LLC | Katy, TX 77450 | Oil & Gas Operator | Jun 2025 |
| 29948 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 29949 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 29950 | Transworld Expl. & Prod., Inc. | | Oil & Gas Operator | Mar 2004 |
| 29951 | Transworld Systems Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 29952 | Trap Rock Oil Company | Cambridge, MA 02138 | Oil & Gas Operator | Nov 2005 |
| 29953 | Trap Rock Oil, LTD. | Houston, TX 77005 | Oil & Gas Operator | Jun 2025 |
| 29954 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 29955 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 29956 | Travco Well Servicing LLC | Okmulgee, OK 74447 | Oil Operator | Mar 2025 |
| 29957 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Jun 2025 |
| 29958 | Travell Energy, Inc | | Oil Operator | Dec 2023 |
| 29959 | Traver Oil & Gas Corporation | | Oil & Gas Operator | Sep 2000 |
| 29960 | Traver Oil Company | | Oil & Gas Operator | Sep 2000 |
| 29961 | Traver-Patterson Petroleum Inc | | Oil & Gas Operator | May 1990 |
| 29962 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 29963 | Traverse Oil Co And Federal Oil Co | | Oil & Gas Operator | Nov 1983 |
| 29964 | Traverse Oil Co. | | Oil & Gas Operator | Nov 1983 |
| 29965 | Travis | Houston, TX 77057 | Oil Operator | Jun 2025 |
| 29966 | Travis Coomer DRLG Co | | Oil Operator | Dec 2023 |
| 29967 | Travis E. Duren | | Oil Operator | Jul 1995 |
| 29968 | Travis Oil Co | Los Angeles, CA 90024 | Oil Operator | Jan 1990 |
| 29969 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Jun 2025 |
| 29970 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 29971 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 29972 | Traxler, Joyce | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 29973 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 29974 | TRC Cypress Group LLC | | Oil & Gas Operator | Mar 2025 |
| 29975 | TRC Operating Company Inc. | | Oil & Gas Operator | Apr 2025 |
| 29976 | Tre'J Exploration, Inc. | | Gas Operator | Dec 1991 |
| 29977 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Jun 2025 |
| 29978 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 29979 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Jun 2025 |
| 29980 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 29981 | Trebole Operating Company | | Oil Operator | Jul 1979 |
| 29982 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Jun 2025 |
| 29983 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 29984 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 29985 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 29986 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 29987 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Feb 2025 |
| 29988 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 29989 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 29990 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 29991 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 29992 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Jun 2025 |
| 29993 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 29994 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Jun 2025 |
| 29995 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 29996 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 29997 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 29998 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 29999 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 30000 | Trend Properties | Olathe, KS 66061 | Gas Operator | Dec 1996 |