| 1 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Mar 2025 |
| 2 | Tecpetrol Operating LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2015 |
| 3 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Mar 2025 |
| 4 | Tepco, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 1999 |
| 5 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Mar 2025 |
| 6 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 7 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 8 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Jan 2025 |
| 9 | Texas Crude Energy, Inc. | Houston, TX 77256 | Oil & Gas Operator | Oct 2012 |
| 10 | Texas Fuel Company | Galveston, TX 77550 | Oil & Gas Operator | Mar 2025 |
| 11 | Texas Gulf Gas Corporation | Fayetteville, TX 78940 | Oil & Gas Operator | Jun 2005 |
| 12 | Texas Independent Explor., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 13 | Texas Meridian Res. Expl., Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1998 |
| 14 | Texas Western Energy Corporation | Portland, TX 78374 | Oil & Gas Operator | Nov 2002 |
| 15 | Texegy Operating Company LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2024 |
| 16 | Texian Operating Company, LLC | Irving, TX 75063 | Oil & Gas Operator | Mar 2025 |
| 17 | Texstar North America, Inc. | Waynesboro, MS 39367 | Oil & Gas Operator | Aug 1994 |
| 18 | Thorp Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 19 | Titan Energy Operating LLC | Houston, TX 77056 | Oil Operator | Jan 2016 |
| 20 | Tiza Energy, Inc. | Austin, TX 78715 | Oil & Gas Operator | Mar 2025 |
| 21 | TNR Petroleum, Inc. | Austin, TX 78747 | Oil & Gas Operator | Sep 1999 |
| 22 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 23 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 24 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 25 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 26 | Trinidad Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 27 | Trinidad Resources, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 28 | True Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 2003 |
| 29 | Truth Resources LP | Houston, TX 77090 | Oil Operator | Sep 2021 |
| 30 | Tryco Exploration, LLC | Plano, TX 75026 | Oil & Gas Operator | Nov 2006 |
| 31 | Tucker Operating Co., Inc. | Victoria, TX 77903 | Oil & Gas Operator | Mar 2025 |
| 32 | Txla Energy, Inc. | Houston, TX 77018 | Oil & Gas Operator | Mar 2025 |