| 101 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 102 | Terrapet Corporation | | Oil & Gas Operator | Jun 2011 |
| 103 | Terrapin Energy LLC | Okmulgee, OK 74447 | Oil Operator | Sep 2025 |
| 104 | Terraquest Corporation | Edmond, OK 73034 | Oil & Gas Operator | Jul 1997 |
| 105 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Oct 2025 |
| 106 | Terry Jack | Konawa, OK 74849-0337 | Oil Operator | Feb 2012 |
| 107 | Terry John Trust | Aurora, CO 80012-5112 | Oil & Gas Operator | May 2016 |
| 108 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 109 | Terzan Energy II LLC | Chandler, OK 74834 | Oil & Gas Operator | Sep 2025 |
| 110 | Tesoro Expl. & Prod. Company | San Antonio, TX 78216 | Gas Operator | Sep 2010 |
| 111 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2025 |
| 112 | Testco Production Company | Watonga, OK 73772-0589 | Oil & Gas Operator | Aug 2013 |
| 113 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Sep 2025 |
| 114 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Aug 2025 |
| 115 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 116 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 117 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 118 | Texaco Oils Inc | Tulsa, OK 74102-2420 | Oil & Gas Operator | Jan 2003 |
| 119 | Texakoma Exploration & Production LLC | Plano, TX 75024 | Oil & Gas Operator | May 2025 |
| 120 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 121 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 122 | Texas American Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 123 | Texas Crude Exploration Inc | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 124 | Texas Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 125 | Texas Energy & Environmental | Houston, TX 77070 | Oil & Gas Operator | Nov 1998 |
| 126 | Texas Energy Mutual LLC | Grapevine, TX 76051-8145 | Oil Operator | Jun 2018 |
| 127 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 128 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 129 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 130 | Texas Moran Exploration Company | Houston, TX 77098 | Oil & Gas Operator | Jun 2023 |
| 131 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 132 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 133 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 134 | Texcel Exploration, Inc. | Colorado SPGS, CO 80960 | Oil & Gas Operator | Dec 2025 |
| 135 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 136 | Texinia Limited Partnership | Dallas, TX 75201 | Gas Operator | Jan 2017 |
| 137 | Texinia Oil & Gas Inc | Dallas, TX 75214 | Oil & Gas Operator | Aug 2025 |
| 138 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 139 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 140 | Texoma Oil & Gas Corporation | Longview, TX 75604-3137 | Oil Operator | Apr 2014 |
| 141 | Texxon Resources, Inc. | Winter Park, FL 32792 | Oil & Gas Operator | Dec 2025 |
| 142 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 143 | Thayer Exploration Company | Wetumka, OK 74883 | Gas Operator | Dec 1996 |
| 144 | The Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 145 | The Dehart Company LLC | Ardmore, OK 73402-0907 | Oil Operator | Aug 2025 |
| 146 | The Elliott Oil Corporation | | Oil & Gas Operator | Aug 2025 |
| 147 | The Galaxy Corporation | Sapulpa, OK 74066 | Oil & Gas Operator | Sep 2025 |
| 148 | The Guinn Company LLC | Asher, OK 74826-6012 | Oil & Gas Operator | Jun 2025 |
| 149 | The KT Oil Company LLC | Ada, OK 74820 | Oil & Gas Operator | Aug 2025 |
| 150 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Sep 2025 |
| 151 | The Twenty Eleven Corp Inc | Ada, OK 74820-3605 | Oil Operator | Aug 2025 |
| 152 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Aug 2025 |
| 153 | Thomas B Rixleben | | Oil & Gas Operator | Jul 2008 |
| 154 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 155 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Aug 2025 |
| 156 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 157 | Thomas Oil Company LLC | Ardmore, OK 73401-3717 | Oil Operator | Sep 2025 |
| 158 | Thomas Production | Electra, TX 76360 | Oil & Gas Operator | Mar 2015 |
| 159 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 160 | Thomas, Ellis W | | Oil & Gas Operator | Aug 2025 |
| 161 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 162 | Thompson Felton | Dewey, OK 74029 | Oil Operator | Jul 1999 |
| 163 | Thompson James R | Okmulgee, OK 74447 | Oil & Gas Operator | Sep 2025 |
| 164 | Thompson Operating Co. | Abernathy, TX 79311 | Oil & Gas Operator | Aug 1994 |
| 165 | Thompson Roy G | Bartlesville, OK 74006 | Oil & Gas Operator | Feb 1993 |
| 166 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 167 | THR Oil | Konawa, OK 74849 | Oil & Gas Operator | Jan 2014 |
| 168 | Three D Resources Inc | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 169 | Three Forks Resources, LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Dec 2025 |
| 170 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 171 | Three Sands Investment Company | Waukomis, OK 73773 | Oil & Gas Operator | Aug 2025 |
| 172 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 173 | Three-N-One | | Oil Operator | Oct 2020 |
| 174 | Threet David Allen | Sand Springs, OK 74063-4035 | Oil & Gas Operator | Jul 2025 |
| 175 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 176 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Sep 2025 |
| 177 | Thunder Petroleum LLC | Owasso, OK 74055-1563 | Oil Operator | Aug 2025 |
| 178 | Tickel Jim & Cindy | Blackwell, OK 74631-6015 | Oil Operator | Jan 2013 |
| 179 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 180 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 181 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 182 | Tidewater Operating Co Inc | Tulsa, OK 74136-6308 | Oil & Gas Operator | Aug 2025 |
| 183 | Tidwell Oil LLC | Roff, OK 74865 | Oil Operator | Feb 2022 |
| 184 | Tiger Eye Resources LLC | Hockley, TX 77447-6911 | Oil Operator | Oct 2012 |
| 185 | Tiger Mountain Gas & Oil | Oklahoma City, OK 73118 | Gas Operator | Sep 1999 |
| 186 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 187 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Sep 2025 |
| 188 | Tilford Pinson Exploration LLC | Edmond, OK 73003 | Oil & Gas Operator | Aug 2025 |
| 189 | Tilley Matt Dba Tilley Oil Co | Hominy, OK 74035 | Oil & Gas Operator | Aug 2025 |
| 190 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2025 |
| 191 | Tilley Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Sep 2025 |
| 192 | Tillman Consulting LLC Dba B & C Operating | Mustang, OK 73064-8195 | Oil Operator | Jan 2022 |
| 193 | Timber Hill Energy | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2011 |
| 194 | Timbercreek Oil Company LLC | Healdton, OK 73438 | Oil Operator | Jun 2025 |
| 195 | Tindall Operating Company | Englewood, CO 80112 | Oil & Gas Operator | Jan 2025 |
| 196 | Tindol Jr Robert | Ryan, OK 73565 | Oil Operator | Oct 2009 |
| 197 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 198 | Titan Oil & Gas Corporation | Edmond, OK 73013-5417 | Oil & Gas Operator | Jul 2025 |
| 199 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Sep 2025 |
| 200 | TJ Oil Company | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |