| 1 | T. L. J. Incorporated | Big Lake, TX 76932 | Oil & Gas Operator | Dec 1998 |
| 2 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 3 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 4 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 5 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 6 | Targa Pipeline Mid-Continent LLC | Sulphur, LA 70665 | Oil & Gas Operator | Jun 2018 |
| 7 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 8 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Sep 2025 |
| 9 | Tejas Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 10 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2025 |
| 11 | Teon Management, LLC | Midland, TX 79704 | Oil & Gas Operator | Mar 2020 |
| 12 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Sep 2025 |
| 13 | Texas Energy Sources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 14 | Texas Energy Trust Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2016 |
| 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 | Sep 2025 |
| 17 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 18 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 19 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 20 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 21 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | Sep 2025 |
| 22 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 23 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 24 | Tomel Production, LLC | Dallas, TX 75360 | Oil & Gas Operator | Sep 2025 |
| 25 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 26 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 27 | Trail Ridge Energy PRTNS II LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jun 2017 |
| 28 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 29 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 30 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 31 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2025 |
| 32 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 33 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2025 |
| 34 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 35 | Triumph Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 36 | Trojan Oil Company, LLC | Big Lake, TX 76932 | Oil Operator | Sep 2025 |
| 37 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2025 |
| 38 | TSF Operating | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 39 | Turner Production | Big Lake, TX 76932 | Oil & Gas Operator | Sep 2025 |
| 40 | TX Heat Of The Permian Basin Inc | Odessa, TX 79768 | Oil & Gas Operator | Dec 2021 |
| 41 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Sep 2025 |