| 1 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 2 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 3 | Tahoe Energy, Inc. | Midland, TX 79703 | Oil & Gas Operator | Jul 1996 |
| 4 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 5 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 6 | Tap Rock Operating, LLC | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 7 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Jul 2025 |
| 8 | Techsys Resources LLC | Houston, TX 77224 | Gas Operator | Aug 2015 |
| 9 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Jul 2025 |
| 10 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 11 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 12 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | May 2025 |
| 13 | Texas Reexploration Operating LC | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2025 |
| 14 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 15 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 16 | Texland Petroleum-Hobbs, L.L.C. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 17 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 18 | The Colborn Company, Inc. | Eunice, NM 88231 | Oil & Gas Operator | Jun 2025 |
| 19 | Thomas R Sivley | Southlake, TX 76092 | Oil & Gas Operator | Mar 2013 |
| 20 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Jul 2025 |
| 21 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 22 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 23 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 24 | Thunderbolt Petroleum, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 25 | Timberline Oil & Gas, LLC | Seminole, TX 79360 | Oil Operator | Mar 2025 |
| 26 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 27 | Tipperary Petro Co | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 28 | Tipton & Denton | Dallas, TX 752196406 | Oil & Gas Operator | Sep 2019 |
| 29 | Tipton Denton & Denton | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2019 |
| 30 | Tipton Oil & Gas Acquisitions, Inc. | Irving, TX 75038 | Oil & Gas Operator | Sep 2010 |
| 31 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 32 | Titus Oil & Gas Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2022 |
| 33 | TK Operating | Cross Plains, TX 76443 | Oil & Gas Operator | Jul 2025 |
| 34 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 35 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Jul 2025 |
| 36 | Tom Brown Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2004 |
| 37 | Tom R Cone | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 38 | Tora Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2008 |
| 39 | Tora Oil & Gas, LLC | Jal, NM 88252 | Oil & Gas Operator | Dec 2020 |
| 40 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 41 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 42 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 43 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 44 | Trio Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Feb 2004 |
| 45 | Tritex Resources, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2009 |
| 46 | Triumph Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 47 | Turrentine Oil & Gas, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2019 |