| 1 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 2 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 3 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 4 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 5 | Targa Pipeline Mid-Continent LLC | Sulphur, LA 70665 | Oil & Gas Operator | Jun 2018 |
| 6 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 7 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Dec 2025 |
| 8 | Taylor-McIlhenny Oper. Co., Inc. | Lewisville, TX 75029 | Oil & Gas Operator | Jan 1996 |
| 9 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Dec 2025 |
| 10 | Terrace Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2013 |
| 11 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Dec 2025 |
| 12 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 13 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 14 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 15 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 16 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 17 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 18 | Three Rivers Operating Co II LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 19 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 20 | Three-B Oil Company, The | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 21 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | Dec 2025 |
| 22 | Tindle Petroleum LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 23 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 24 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 25 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 26 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 27 | Tres Roughneckas WTX LLC | MC Camey, TX 79752 | Oil Operator | Dec 2025 |
| 28 | Trey Services, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 1996 |
| 29 | Triesco, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1996 |
| 30 | Trigo Oil And Gas, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Mar 2022 |
| 31 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 32 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 33 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 34 | Tripp & Sons, LLC | Odessa, TX 79768 | Oil & Gas Operator | Dec 2025 |
| 35 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 36 | True Oil Company LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2016 |
| 37 | TS Oil, LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Dec 2025 |
| 38 | TSF Operating | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 39 | TX Heat Of The Permian Basin Inc | Odessa, TX 79768 | Oil & Gas Operator | Dec 2021 |
| 40 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |