| 1 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 2 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 3 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 4 | Tall City Operations III LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2023 |
| 5 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 6 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 7 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 8 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Feb 2026 |
| 9 | Teke Production LLC | Houston, TX 77269 | Oil Operator | Feb 2026 |
| 10 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 11 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 12 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Feb 2026 |
| 13 | Texas Reexploration Operating LC | Fredericksbrg, TX 78624 | Oil & Gas Operator | Feb 2026 |
| 14 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 15 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 16 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 17 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 18 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 19 | Three-B Oil Company, The | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 20 | Tiburon Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2000 |
| 21 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 22 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 23 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 24 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 25 | Tradition Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 26 | Tradition Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2017 |
| 27 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 28 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 29 | Triag Energy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2014 |
| 30 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Feb 2026 |
| 31 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Feb 2026 |
| 32 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 33 | TS Oil, LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Feb 2026 |
| 34 | Tumbleweed Energy Limited | Midland, TX 79704 | Oil & Gas Operator | Dec 2022 |
| 35 | Two Black Bears Oil, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2003 |
| 36 | Two P Partners, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 37 | TX Heat Of The Permian Basin Inc | Odessa, TX 79768 | Oil & Gas Operator | Dec 2021 |