| 1 | T. R. Production, Inc. | Pilot Point, TX 76258 | Oil & Gas Operator | Jul 2021 |
| 2 | Targa Midstream Services LLC | Tulsa, OK 74103 | Oil Operator | Mar 2023 |
| 3 | Targa Pipeline Mid-Continent LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2018 |
| 4 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 5 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | Sep 2026 |
| 6 | Taylor & Smith | Gainesville, TX 76240 | Oil & Gas Operator | Sep 2026 |
| 7 | Taylor, Smith And Kimbell | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 8 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 9 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 10 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Sep 2026 |
| 11 | Tettleton, Jon Otis | Nocona, TX 76255 | Oil & Gas Operator | Aug 2003 |
| 12 | Tettleton, Steven B. | Nocona, TX 76255 | Oil Operator | Sep 2026 |
| 13 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Sep 2026 |
| 14 | Texas Exploration & Prod. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 1996 |
| 15 | Texas Independent Oil Co., LLC | Argyle, TX 76226 | Oil & Gas Operator | Sep 2026 |
| 16 | Texcel Exploration, Inc. | Colorado SPGS, CO 80960 | Oil & Gas Operator | Sep 2026 |
| 17 | The Cornell Corporation | Ruston, LA 71273 | Oil & Gas Operator | Sep 1993 |
| 18 | Thunder Resources LLC | Graham, TX 76450 | Oil Operator | Sep 2026 |
| 19 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | May 2026 |
| 20 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 21 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 22 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2026 |
| 23 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |