| 1 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Apr 2024 |
| 2 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 3 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 4 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 5 | Texian Operating Company, LLC | Irving, TX 75063 | Oil & Gas Operator | Apr 2024 |
| 6 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 7 | Texstar Oil & Gas, LLC | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 8 | Thomas Oil & Gas Company | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 9 | Tilmon Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Sep 2012 |
| 10 | Titan Exploration LLC | Luling, TX 78648 | Oil & Gas Operator | Feb 2024 |
| 11 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 12 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 13 | Trinidad Petroleum, Inc. | Austin, TX 78711 | Oil & Gas Operator | Apr 2024 |
| 14 | Triple C Oil Inc. | Lockhart, TX 78644 | Oil Operator | Aug 2019 |
| 15 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | Apr 2024 |
| 16 | Truth Resources LP | Conroe, TX 77304 | Oil Operator | Sep 2021 |
| 17 | Tuleta Energy Partners, LLC | Norman, OK 73072 | Oil & Gas Operator | Apr 2024 |
| 18 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 19 | TX Lone Star Operating Co, LLC | Sulphur SPGS, TX 75483 | Oil & Gas Operator | Apr 2024 |
| 20 | Txla Energy, Inc. | Houston, TX 77018 | Oil & Gas Operator | Apr 2024 |