| 1 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 2 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 3 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Mar 2025 |
| 4 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 5 | Tap Rock Operating, LLC | Golden, CO 80401 | Oil & Gas Operator | Mar 2025 |
| 6 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 7 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 8 | Teke Production LLC | Houston, TX 77269 | Oil Operator | Mar 2025 |
| 9 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 10 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Mar 2025 |
| 11 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Mar 2025 |
| 12 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 13 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 14 | Three-B Oil Company, The | Monahans, TX 79756 | Oil & Gas Operator | Mar 2025 |
| 15 | Thunderbolt Petroleum Co. LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 16 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 17 | Titus Oil & Gas Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2022 |
| 18 | Tiza Energy, Inc. | Austin, TX 78715 | Oil & Gas Operator | Mar 2025 |
| 19 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 20 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Mar 2025 |
| 21 | Tom E. Johnson Exploration LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 22 | Trail Mountain, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Jan 2016 |
| 23 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 24 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 25 | Truth Resources LP | Houston, TX 77090 | Oil Operator | Sep 2021 |