| 1 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 2 | T.G. Energy Co. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2008 |
| 3 | Tabco Exploration Inc. | New Orleans, LA 70131 | Oil & Gas Operator | Dec 1998 |
| 4 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 5 | Talisman Resources, Inc. | Argyle, TX 76226 | Oil & Gas Operator | Mar 1995 |
| 6 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 7 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 8 | Taylor, Ben J. Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2022 |
| 9 | TCS Petroleum Co., LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 10 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 11 | Teal Exploration, LLC | Abilene, TX 79602 | Oil Operator | Feb 2026 |
| 12 | Tejas Petroleum Resources, LLC | Aubrey, TX 76227 | Oil & Gas Operator | Feb 2026 |
| 13 | Tetragon Investments, LLC | Abilene, TX 79604 | Oil Operator | Jul 2014 |
| 14 | Tex-Ann Oil & Gas Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 15 | Texas Operating & Consult., LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2018 |
| 16 | Texas Pharchem Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2019 |
| 17 | Texas Sands Resources, LLC | Abilene, TX 79603 | Oil Operator | Feb 2026 |
| 18 | Texas United Geoproduction, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2026 |
| 19 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 20 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 21 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 22 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 23 | Texxon Resources, Inc. | Winter Park, FL 32792 | Oil & Gas Operator | Feb 2026 |
| 24 | Texzona Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1997 |
| 25 | Thornton Oil Co. | Abilene, TX 79603 | Oil & Gas Operator | Aug 2003 |
| 26 | Thornton, Michael D. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1995 |
| 27 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 28 | Threshold Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | Oct 2015 |
| 29 | THT Covenant Holdings, LLC | Henrietta, TX 76365 | Oil Operator | Feb 2026 |
| 30 | Thunderbolt Oil & Gas, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Feb 2004 |
| 31 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | Feb 2026 |
| 32 | TKP Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Feb 2026 |
| 33 | TNC Energy, LLC | Lubbock, TX 79401 | Oil & Gas Operator | Nov 2016 |
| 34 | Tollett Oil | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 35 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 36 | Tracker Mineral | Clyde, TX 79510 | Oil & Gas Operator | Feb 2026 |
| 37 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 38 | Triple "G" Oil Company | Clyde, TX 79510 | Oil & Gas Operator | Apr 1999 |
| 39 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | Feb 2026 |
| 40 | Trust Oil Co. | Pine, CO 80470 | Oil & Gas Operator | Feb 2026 |
| 41 | TSW Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jan 2016 |
| 42 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 43 | Txu Lone Star Pipeline | Dallas, TX 75201 | Oil & Gas Operator | Oct 2003 |