| 1 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 2 | Tabula Rasa Energy, LLC | Allen, TX 75013 | Oil & Gas Operator | Dec 2020 |
| 3 | Tacoma Operating LLC | Midland, TX 79707 | Oil Operator | Mar 2026 |
| 4 | Tacor Resources Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2026 |
| 5 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Mar 2026 |
| 6 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2026 |
| 7 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 8 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Mar 2026 |
| 9 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 10 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2026 |
| 11 | Tejas Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 12 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Mar 2026 |
| 13 | Texas Rayco Inc. | Palmetto, FL 34221 | Oil & Gas Operator | Mar 2026 |
| 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 | Mar 2026 |
| 16 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 17 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 18 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 19 | Three Forks Resources, LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Mar 2026 |
| 20 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2026 |
| 21 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 22 | Trail Mountain, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Jan 2016 |
| 23 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 24 | Tripp & Sons, LLC | Odessa, TX 79768 | Oil & Gas Operator | Mar 2026 |
| 25 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |