| 1 | Talon Oil & Gas LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2010 |
| 2 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 3 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 4 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 5 | Tarpon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | Mar 2025 |
| 6 | Tarpon Oil Company | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2017 |
| 7 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 8 | Taylor, Ben J. Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2022 |
| 9 | Taylor, G. E. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2001 |
| 10 | Taylor, G. E. Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jul 2007 |
| 11 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Mar 2025 |
| 12 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 13 | Tech Resources, Inc. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2001 |
| 14 | Tejas Western Corp. | Granbury, TX 76048 | Oil & Gas Operator | Jul 2018 |
| 15 | Teleo Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2009 |
| 16 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |
| 17 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 18 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Mar 2025 |
| 19 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 20 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 21 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Jan 2025 |
| 22 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 23 | Texas Exploration & Prod. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 1996 |
| 24 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 25 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 26 | Texu Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2007 |
| 27 | Texxol Operating Company, Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Mar 2025 |
| 28 | Theisen, VIncent A. | Wilmington, DE 19807 | Oil & Gas Operator | Sep 2003 |
| 29 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 30 | Timber Creek Operating LLC | Granbury, TX 76049 | Oil & Gas Operator | Mar 2025 |
| 31 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2024 |
| 32 | Torch Operating LLC | Fort Worth, TX 76135 | Oil & Gas Operator | Oct 2020 |
| 33 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2025 |
| 34 | Trans-Texas Energy Group LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2015 |
| 35 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 36 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 37 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 38 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 39 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |