| 1 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 2 | T.F. Well Service, L.L.C. | Iowa Park, TX 76367 | Oil Operator | Oct 2025 |
| 3 | Talon Production, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 4 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 5 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 6 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 7 | Texas Crude, Inc. | Houston, TX 77256 | Oil & Gas Operator | Oct 1995 |
| 8 | Thomas Production | Electra, TX 76360 | Oil & Gas Operator | Mar 2015 |
| 9 | Thompson, Richard W. Inc. | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 10 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 11 | Thunderbird Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 12 | Tradition Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 13 | Tradition Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2017 |
| 14 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 15 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 16 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 17 | Triple "S" Gas, Inc. | Louisville, KY 40255 | Oil & Gas Operator | Oct 2025 |
| 18 | Triton Operating LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 19 | True Wolf Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Oct 2025 |
| 20 | Tucker Resources, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 21 | Twilco Operating LLC | Holliday, TX 76366 | Oil Operator | Oct 2025 |
| 22 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 2025 |