| 1 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 2 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 3 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 4 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 5 | Taylor, Dutch | Graham, TX 76450 | Oil & Gas Operator | Jan 2016 |
| 6 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 7 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Oct 2025 |
| 8 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 9 | Tempo Resources GP, LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2013 |
| 10 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Jun 2025 |
| 11 | Tex-Ann Oil & Gas Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 12 | Texas Shallow Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 13 | Texas United Geoproduction, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2025 |
| 14 | Texian Energy Corporation | Amarillo, TX 79120 | Oil & Gas Operator | Apr 1997 |
| 15 | Texian Operating Company, LLC | Irving, TX 75063 | Oil & Gas Operator | Oct 2025 |
| 16 | Texxol Operating Company, Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Oct 2025 |
| 17 | Thornton, Michael D. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1995 |
| 18 | Three P Operating Co.,GP, L.L.C. | Newcastle, TX 76372 | Oil & Gas Operator | Oct 2025 |
| 19 | Three P Operating Company | Newcastle, TX 76372 | Oil & Gas Operator | Nov 2007 |
| 20 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 21 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 22 | Throckmorton Oil, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 23 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2025 |
| 24 | Thunder Resources LLC | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 25 | Tiara Resources, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 1998 |
| 26 | Tiki Oil & Gas, LLC | Cisco, TX 76437 | Oil Operator | Oct 2025 |
| 27 | Timn Oil Co. | Lubbock, TX 79424 | Oil & Gas Operator | Aug 1997 |
| 28 | Titan Energy, Inc. | Austin, TX 78703 | Oil & Gas Operator | Oct 2025 |
| 29 | TKP Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Oct 2025 |
| 30 | Todd, J R Oil & Investments, Inc | Dallas, TX 75206 | Oil & Gas Operator | Jun 2002 |
| 31 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Oct 2025 |
| 32 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 33 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 34 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 35 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 36 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Jun 2025 |
| 37 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 38 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 39 | Triple Singleton, Inc. | Santa Fe, TX 77510 | Oil & Gas Operator | Dec 2020 |
| 40 | Tritex Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jan 2013 |
| 41 | Trust Oil Co. | Pine, CO 80470 | Oil & Gas Operator | Oct 2025 |
| 42 | Trutex Operating, LLC | Haltom City, TX 76117 | Oil & Gas Operator | Oct 2025 |
| 43 | Tug Oil & Gas, L.L.C. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 44 | Twin Oaks Construction Company | Irving, TX 75063 | Oil & Gas Operator | Oct 2025 |