| 1 | Tactical Operating Company, LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 2 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 3 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 4 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 5 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 6 | Texeast Operating Co., Inc. | Farmers BRNCH, TX 75234 | Oil Operator | Dec 2024 |
| 7 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 8 | Texlan Oil Company, L.C. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2003 |
| 9 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Oct 2024 |
| 10 | Three D Submersible Pumps, Inc. | Heavener, OK 74937 | Oil & Gas Operator | Aug 2003 |
| 11 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Dec 2024 |
| 12 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Dec 2024 |
| 13 | Trans-Texas Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 1993 |
| 14 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Dec 2024 |
| 15 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 16 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 17 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 18 | TTK Energy LLC | Kilgore, TX 75663 | Oil Operator | Dec 2024 |
| 19 | TXX Operating LLC | Shreveport, LA 71133 | Oil & Gas Operator | Dec 2024 |