| 1 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 2 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 3 | Tawa Operating Co., Inc. | Mertzon, TX 76941 | Oil & Gas Operator | May 2019 |
| 4 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Oct 2025 |
| 5 | Tejas Permian Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 6 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 7 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Oct 2025 |
| 8 | Thomas Oil And Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 9 | THP Operating LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 10 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 11 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 12 | Tiburon Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2000 |
| 13 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 14 | Toc Energy Resources, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 15 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 16 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 17 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 18 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 19 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 20 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 21 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 22 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 23 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 24 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76301 | Oil Operator | Jun 2025 |
| 25 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 26 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 27 | Tucker Drilling Company, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Jul 1996 |
| 28 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 29 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |