| 1 | T W Clemons Operating Co., LLC | Minden, LA 71055 | Oil & Gas Operator | Jul 2025 |
| 2 | T. And M. Production | Oil City, LA 71061 | Oil & Gas Operator | Jul 2025 |
| 3 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 4 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 5 | Tanos Exploration IV, LLC | Tyler, TX 75703 | Oil & Gas Operator | Jul 2025 |
| 6 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 7 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 8 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Jul 2025 |
| 9 | TC3 Energy Company | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 10 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 11 | Terry Petroleum Company | Houston, TX 77270 | Oil & Gas Operator | Dec 1997 |
| 12 | Tesoro E&P Company, L.P. | San Antonio, TX 78216 | Oil & Gas Operator | Jan 2000 |
| 13 | Tex-Ok Energy, LTD Partnership | Cody, WY 82414 | Oil & Gas Operator | Jul 2025 |
| 14 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Jul 2025 |
| 15 | Texas Royalty Corp. | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 16 | Texla Operating Co | Jonesville, TX 75659 | Oil & Gas Operator | Jul 2025 |
| 17 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 18 | Texlan Oil Company, L.C. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2003 |
| 19 | TGNR East Texas II LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 20 | TGNR East Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 21 | TGNR Gulf Coast LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 22 | TGNR TVL LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 23 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | May 2025 |
| 24 | Thor-Max Operating, Inc. | Plano, TX 75025 | Oil & Gas Operator | Jul 2025 |
| 25 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2025 |
| 26 | Thunderbird (Texas) Resources LP | Edmond, OK 73025 | Oil & Gas Operator | Apr 2019 |
| 27 | Tipco Operating Co. | Marshall, TX 75671 | Oil & Gas Operator | Jul 2025 |
| 28 | Titan Rock E&P, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 29 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 30 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 31 | Trans-Texas Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 1993 |
| 32 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 33 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 34 | Trico Oil & Gas Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Jul 2025 |
| 35 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 36 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 37 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 38 | Trivium Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 39 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |