| 1 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 2 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 3 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 4 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Jun 2025 |
| 5 | Te-Ray Resources, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2015 |
| 6 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2025 |
| 7 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 8 | Tesoro E&P Company, L.P. | San Antonio, TX 78216 | Oil & Gas Operator | Jan 2000 |
| 9 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Jun 2025 |
| 10 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 11 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2025 |
| 12 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Jan 2025 |
| 13 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Jun 2025 |
| 14 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 15 | Texas Utilities Fuel Co. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2018 |
| 16 | Texas Utilities Mining Co. | Dallas, TX 75201 | Oil & Gas Operator | May 1995 |
| 17 | Texeast Operating Co., Inc. | Farmers BRNCH, TX 75234 | Oil Operator | Jun 2025 |
| 18 | Texokan Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 19 | TGNR East Texas II LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 20 | TGNR East Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 21 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 22 | Thorp Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 23 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jun 2025 |
| 24 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2025 |
| 25 | Thunderbird (Texas) Resources LP | Edmond, OK 73025 | Oil & Gas Operator | Apr 2019 |
| 26 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 27 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2025 |
| 28 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Jun 2025 |
| 29 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 30 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 31 | Total E&P USA, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 2025 |
| 32 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 33 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Jun 2025 |
| 34 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Jun 2025 |
| 35 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 36 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 37 | Trico Oil & Gas Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 2025 |
| 38 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 39 | Triple M Saltwater Disposal, LP | Kilgore, TX 75663 | Oil Operator | Jun 2025 |
| 40 | Trivium Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2025 |
| 41 | Tryco Exploration, LLC | Plano, TX 75026 | Oil & Gas Operator | Nov 2006 |
| 42 | Twojo, Inc. | Longview, TX 75601 | Oil & Gas Operator | Nov 1996 |
| 43 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |