| 1 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 2 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 3 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 4 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 5 | Tam2 Squared Energy Services,LLC | Rockwall, TX 75032 | Oil Operator | Oct 2025 |
| 6 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 7 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 8 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 9 | Taylor, Dutch | Graham, TX 76450 | Oil & Gas Operator | Jan 2016 |
| 10 | TB Petroleum, LLC | Petrolia, TX 76377 | Oil & Gas Operator | Oct 2025 |
| 11 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Oct 2025 |
| 12 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 13 | Teague, J. V. & Robinson, E. W. | Olney, TX 76374 | Oil & Gas Operator | May 1996 |
| 14 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 15 | Tempo Resources GP, LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2013 |
| 16 | Terry Petroleum Company | Houston, TX 77270 | Oil & Gas Operator | Dec 1997 |
| 17 | Terry, Lewis D. | Olney, TX 76374 | Oil & Gas Operator | Sep 1995 |
| 18 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 19 | Texas Shallow Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 20 | Texas Utilities Fuel Co. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2018 |
| 21 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 22 | Texu Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2007 |
| 23 | Thompson, Mark P. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 24 | Thornton, Michael D. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1995 |
| 25 | Three B Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 26 | Three P Operating Co.,GP, L.L.C. | Newcastle, TX 76372 | Oil & Gas Operator | Oct 2025 |
| 27 | Three P Operating Company | Newcastle, TX 76372 | Oil & Gas Operator | Nov 2007 |
| 28 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 29 | Thunderbird Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 30 | Titan Energy, Inc. | Austin, TX 78703 | Oil & Gas Operator | Oct 2025 |
| 31 | TLH Production LLC | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 32 | Tomsha LLC | Bryson, TX 76427 | Oil Operator | Oct 2025 |
| 33 | TR Operating LLC | Graham, TX 76450 | Oil Operator | Aug 2025 |
| 34 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 35 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 36 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 37 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 38 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 39 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 40 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 41 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 42 | Tri-K Production Company, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 1996 |
| 43 | Triangle Energy Co. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 44 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 45 | Triple "W" Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 46 | Triton Energy LLC | Wortham, TX 76693 | Oil & Gas Operator | Oct 2025 |
| 47 | Turner, Randy | Olney, TX 76374 | Oil & Gas Operator | Jan 2005 |
| 48 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 49 | Txon Partners, LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2017 |
| 50 | Txu Fuel Company | Dallas, TX 75201 | Oil & Gas Operator | May 2004 |