| 28001 | Tallgrass Production Company LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2014 |
| 28002 | Tallman Industries Inc | | Oil Operator | Mar 2026 |
| 28003 | Tallman Trust Co | | Oil Operator | Apr 2026 |
| 28004 | Talon Development Company | Boerne, TX 78006 | Oil & Gas Operator | Sep 2007 |
| 28005 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Jan 2026 |
| 28006 | Talon Oil & Gas LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2010 |
| 28007 | Talon Production, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2026 |
| 28008 | Talos Energy Offshore LLC | | Oil & Gas Operator | Jan 2025 |
| 28009 | Talos Ert LLC | | Oil & Gas Operator | Jan 2025 |
| 28010 | Talos Gulf Coast Onshore LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 28011 | Talos Third Coast LLC | | Oil & Gas Operator | Dec 2024 |
| 28012 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 28013 | Tam2 Squared Energy Services,LLC | Rockwall, TX 75032 | Oil Operator | May 2026 |
| 28014 | Tam2 Squared Operating, LLC | Rockwall, TX 75032 | Oil & Gas Operator | May 2026 |
| 28015 | Tamarack Energy Inc | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 28016 | Tamarack Pet Co, Inc | | Oil Operator | Dec 2020 |
| 28017 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 28018 | Tamaroa Operating, LLC | Plano, TX 750866937 | Oil & Gas Operator | Mar 2026 |
| 28019 | Tamarron Resources, Inc. | Azle, TX 76020 | Oil & Gas Operator | May 2026 |
| 28020 | Tamer Oil & Gas | Seminole, TX 79360 | Oil & Gas Operator | May 2026 |
| 28021 | Tammany Oil & Gas LLC | | Oil & Gas Operator | Feb 2005 |
| 28022 | Tamoil | | Oil Operator | May 2017 |
| 28023 | Tampke Service Co. | Devine, TX 78016 | Oil Operator | May 2026 |
| 28024 | Tamworth Resources LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 28025 | Tana Exploration Company LLC | Dallas, TX 75219 | Oil & Gas Operator | Aug 2021 |
| 28026 | Tana Oil And Gas Corporation | Irving, TX 75062 | Oil & Gas Operator | Mar 2000 |
| 28027 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 28028 | Tandem Oil Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Oct 1998 |
| 28029 | Tanglehead Operating, LLC | La Vernia, TX 78121 | Oil Operator | May 2026 |
| 28030 | Tanglewood Expl LLC | Fort Worth, TX 76102-4665 | Gas Operator | Jun 2011 |
| 28031 | Tanglewood Oil & Gas Co. | Gouldbusk, TX 76845 | Oil & Gas Operator | May 2026 |
| 28032 | Tanglewood Oil & Gas LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2017 |
| 28033 | Tank Truck'S Inc | Sapulpa, OK 74066 | Oil Operator | Apr 2026 |
| 28034 | Tankersley, D. C. | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 28035 | Tannehill Oil Company | | Oil & Gas Operator | Dec 1991 |
| 28036 | Tanner Oil, Inc | | Oil & Gas Operator | Nov 2024 |
| 28037 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 28038 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 28039 | Tanos Exploration IV, LLC | Tyler, TX 75703 | Oil & Gas Operator | May 2026 |
| 28040 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 28041 | Tanos Production, Inc. | Houston, TX 77077 | Oil & Gas Operator | Aug 2003 |
| 28042 | Tansky J/Tansky Oil Prod | Logan, OH 43138 | Oil & Gas Operator | Dec 1997 |
| 28043 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 28044 | Tap Management Inc | Austin, TX 78757 | Oil & Gas Operator | Jan 2023 |
| 28045 | Tap Operating Company, Inc. | Mexia, TX 76667 | Oil & Gas Operator | May 1995 |
| 28046 | Tap Petroleum Inc | Cleveland, OK 74020-0054 | Oil & Gas Operator | Apr 2020 |
| 28047 | Tap Rock Operating, LLC | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 28048 | Tapo Energy, LLC | West Union, WV 26456 | Oil & Gas Operator | Dec 2021 |
| 28049 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 28050 | Tapp, Deborah Trust | Madisonville, KY 42431 | Oil Operator | Dec 2019 |
| 28051 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Mar 2026 |
| 28052 | Taqa USA, Inc. | Centennial, CO 80111 | Oil & Gas Operator | Jul 2020 |
| 28053 | Tara Company, The | Wichita Falls, TX 76301 | Oil Operator | Sep 2003 |
| 28054 | Tara Oil Company | | Oil Operator | Dec 1981 |
| 28055 | Tara Operating Co. | Lamesa, TX 79331 | Oil & Gas Operator | Aug 2003 |
| 28056 | Tarco Energy, LC | Lubbock, TX 79423 | Oil & Gas Operator | Dec 2025 |
| 28057 | Tare Resources, LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | May 2026 |
| 28058 | Targa Development, Inc. | Clarksburg, WV 26301-0000 | Oil & Gas Operator | Dec 2021 |
| 28059 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 28060 | Targa Pipeline Mid-Continent LLC | Sulphur, LA 70665 | Oil & Gas Operator | Jun 2018 |
| 28061 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | Jan 2026 |
| 28062 | Target Drilling | | Oil & Gas Operator | Feb 2018 |
| 28063 | Target Energy Inc | Indiana, PA 15701-1135 | Oil & Gas Operator | Dec 2013 |
| 28064 | Target Engery Corp | Brecksville, OH 44141 | Oil & Gas Operator | Dec 1992 |
| 28065 | Target Oil & Gas Corp | | Oil & Gas Operator | Dec 2013 |
| 28066 | Target Oil & Gas, Inc. | | Oil & Gas Operator | Nov 2011 |
| 28067 | Target Oil Company | | Oil & Gas Operator | Mar 2007 |
| 28068 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2026 |
| 28069 | Tarka Energy LLC | Houston, TX 77056-1940 | Oil & Gas Operator | Mar 2022 |
| 28070 | Tarpon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2026 |
| 28071 | Tarpon Oil Company | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2016 |
| 28072 | Tarpon Oil Of Texas | | Oil & Gas Operator | Aug 1994 |
| 28073 | Tarpon Resources, LP | Midland, TX 79704 | Gas Operator | May 2026 |
| 28074 | Tarrant Operators, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 1994 |
| 28075 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 28076 | Tartan Resources Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 1995 |
| 28077 | Tarter, Donald & David | Dunnville, KY 42528 | Oil Operator | Dec 2020 |
| 28078 | Tarwater Oil & Gas LLC | San Jose, CA 95128-4219 | Oil & Gas Operator | Dec 2023 |
| 28079 | Tasca Exploration Company | Houston, TX 77257 | Oil & Gas Operator | Jun 2002 |
| 28080 | Tascosa Energy Partners, L.L.C | Midland, TX 79701 | Oil & Gas Operator | Mar 2026 |
| 28081 | Tascosa Petroleum Corporation | Amarillo, TX 79105 | Oil & Gas Operator | May 2026 |
| 28082 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 28083 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | May 2026 |
| 28084 | Tatco Petroleum Oper Inc | Canton, OH 44735 | Oil & Gas Operator | Dec 1989 |
| 28085 | Tatco, Inc. | | Oil & Gas Operator | May 1991 |
| 28086 | Tate Gas Company | Glenville, WV 26351-0000 | Oil & Gas Operator | Dec 2021 |
| 28087 | Tate, Larry V. Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2002 |
| 28088 | Tatonka Oil Co LLC | Columbus, OH 43201-3684 | Oil & Gas Operator | Dec 2025 |
| 28089 | Tatum Petroleum Co LLC | Zanesville, OH 43702 | Oil & Gas Operator | Dec 2018 |
| 28090 | Tatum Petroleum Corp | Zanesville, OH 43702 | Oil & Gas Operator | Dec 2008 |
| 28091 | Tau Ventures | Tulsa, OK 74105-1026 | Oil & Gas Operator | Feb 2026 |
| 28092 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 28093 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 28094 | Taurus Exploration, Inc. | | Oil & Gas Operator | Mar 2026 |
| 28095 | Taurus Minerals Inc /Osage Only | | Oil Operator | Aug 2013 |
| 28096 | Taurus Minerals, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 28097 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 28098 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2026 |
| 28099 | Taurus Petr-Fieldcrest Petr | | Oil & Gas Operator | Apr 1989 |
| 28100 | Taurus Petroleum | | Oil & Gas Operator | Jul 1987 |