| 1 | Talon Production, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2026 |
| 2 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 3 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 4 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 5 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 6 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2026 |
| 7 | Tarpon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2026 |
| 8 | Tarpon Oil Company | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2016 |
| 9 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 10 | Taylor, Ben J. Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2022 |
| 11 | Taylor, G. E. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2001 |
| 12 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | May 2026 |
| 13 | Tejas Western Corp. | Granbury, TX 76048 | Oil & Gas Operator | Jul 2018 |
| 14 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2026 |
| 15 | Tempo Resources GP, LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2013 |
| 16 | Tessara Petroleum Resources, LLC | Houston, TX 77086 | Oil & Gas Operator | Apr 2020 |
| 17 | Tex-Am Petroleum Corp. | Eastland, TX 76448 | Oil & Gas Operator | May 2026 |
| 18 | Texas Pharchem Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2019 |
| 19 | Texas Shallow Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 20 | Texdon Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2005 |
| 21 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 22 | Texu Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2007 |
| 23 | Texxol Operating Company, Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | May 2026 |
| 24 | TFX, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2019 |
| 25 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 26 | Three B Corporation | Fort Worth, TX 76179 | Gas Operator | Jun 2009 |
| 27 | Three B Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 28 | Three B, LP | Fort Worth, TX 76179 | Gas Operator | May 2026 |
| 29 | Three P Operating Co.,GP, L.L.C. | Newcastle, TX 76372 | Oil & Gas Operator | May 2026 |
| 30 | Three P Operating Company | Newcastle, TX 76372 | Oil & Gas Operator | Nov 2007 |
| 31 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 32 | Threshold Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | Oct 2015 |
| 33 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 34 | Torch Operating LLC | Fort Worth, TX 76135 | Oil & Gas Operator | Oct 2020 |
| 35 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | May 2026 |
| 36 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | May 2026 |
| 37 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 38 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 39 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 40 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |
| 41 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | May 2026 |
| 42 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 43 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2026 |
| 44 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2019 |
| 45 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 46 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 47 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2026 |
| 48 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 49 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | May 2026 |
| 50 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |
| 51 | Trust Oil Co. | Pine, CO 80470 | Oil & Gas Operator | May 2026 |