| 1 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 2 | Tabor Creek Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 3 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 4 | Tankersley, D. C. | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 5 | Targa Midstream Services LLC | Tulsa, OK 74103 | Oil Operator | Mar 2023 |
| 6 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 7 | Taylor, Raymond C. Jr. | Woodway, TX 76712 | Oil & Gas Operator | Dec 2012 |
| 8 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2026 |
| 9 | Terry'S Roustabout Service, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Oct 2002 |
| 10 | Tetragon Investments, LLC | Abilene, TX 79604 | Oil Operator | Jul 2014 |
| 11 | Tex-Ann Oil & Gas Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 12 | Texas Pharchem Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2019 |
| 13 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 14 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 15 | Texowa, LLC | Roanoke, TX 76262 | Oil Operator | Sep 2026 |
| 16 | Texzona Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1997 |
| 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 | Sep 2026 |
| 19 | Throckmorton Oil, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 20 | Thunderbolt Oil & Gas, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Feb 2004 |
| 21 | Tiara Resources, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 1998 |
| 22 | Tidmore, Ann | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 23 | Tiki Oil & Gas, LLC | Cisco, TX 76437 | Oil & Gas Operator | Sep 2026 |
| 24 | Tollett Oil | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 25 | Tom-Tom Operating, LLC | Dallas, TX 75209 | Oil & Gas Operator | Sep 2026 |
| 26 | Tracker Mineral | Clyde, TX 79510 | Oil & Gas Operator | Sep 2026 |
| 27 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 28 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 29 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 30 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Sep 2026 |
| 31 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 32 | Triple Singleton, Inc. | Santa Fe, TX 77510 | Oil & Gas Operator | Dec 2020 |
| 33 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |
| 34 | TSW Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jan 2016 |