| 1 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Sep 2026 |
| 2 | T & T Oil Co. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2002 |
| 3 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 4 | TCS Petroleum Co., LLC | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 5 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 6 | Teaco | Snyder, TX 79550 | Oil & Gas Operator | Jan 1998 |
| 7 | Teal Exploration, LLC | Abilene, TX 79602 | Oil Operator | Sep 2026 |
| 8 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2026 |
| 9 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Sep 2026 |
| 10 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 11 | Tex-Ann Oil & Gas Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 12 | Texas Pharchem Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2019 |
| 13 | Texas Sands Resources, LLC | Abilene, TX 79603 | Oil Operator | Sep 2026 |
| 14 | Texas United Geoproduction, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Sep 2026 |
| 15 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 16 | Texzona Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1997 |
| 17 | Thomas, T. N. Oil Company | Aiken, SC 29801 | Oil & Gas Operator | Sep 2026 |
| 18 | Thompson, Richard W. Inc. | Plano, TX 75024 | Oil & Gas Operator | Sep 2026 |
| 19 | Three Forks Resources, LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Sep 2026 |
| 20 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 21 | THT Covenant Holdings, LLC | Henrietta, TX 76365 | Oil Operator | Sep 2026 |
| 22 | Thunderbolt Oil & Gas, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Feb 2004 |
| 23 | Tiza Energy, Inc. | Austin, TX 78715 | Oil & Gas Operator | Sep 2026 |
| 24 | TK Operating | Cross Plains, TX 76443 | Oil & Gas Operator | Sep 2026 |
| 25 | Tollett Oil | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 26 | Tom-Tom Operating, LLC | Dallas, TX 75209 | Oil & Gas Operator | Sep 2026 |
| 27 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Sep 2026 |
| 28 | Tracker Mineral | Clyde, TX 79510 | Oil & Gas Operator | Sep 2026 |
| 29 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 30 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 31 | Trinity Minerals&Operating Corp. | Abilene, TX 79605 | Oil & Gas Operator | Dec 1995 |
| 32 | Triple "G" Oil Company | Clyde, TX 79510 | Oil & Gas Operator | Apr 1999 |
| 33 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | Sep 2026 |
| 34 | Tristar Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Sep 2026 |
| 35 | TSW Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jan 2016 |
| 36 | Tuckco Petroleum Corporation | Andrews, TX 79714 | Oil & Gas Operator | Feb 2026 |
| 37 | Turner, Greg | Cross Plains, TX 76443 | Oil & Gas Operator | Sep 2026 |
| 38 | Txu Lone Star Pipeline | Dallas, TX 75201 | Oil & Gas Operator | Oct 2003 |