| 101 | T. N. T. Energy Co. | Belcher, LA 71004 | Oil Operator | May 1991 |
| 102 | T. N. T. Inc. | | Oil & Gas Operator | Jan 1987 |
| 103 | T. N. T. Tribal - Luffey | | Gas Operator | Oct 1994 |
| 104 | T. O. Kimbrell, LLC | | Oil & Gas Operator | Jul 2025 |
| 105 | T. R. Production, Inc. | Pilot Point, TX 76258 | Oil & Gas Operator | Jul 2021 |
| 106 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 107 | T. W. Drilling Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2002 |
| 108 | T. W. McGuire & Associates, Inc. | | Oil & Gas Operator | Nov 2018 |
| 109 | T. West Bullock, SR. | | Oil & Gas Operator | Mar 1989 |
| 110 | T.B. Lanford Et Al | | Oil Operator | Apr 1987 |
| 111 | T.C. Harris Pumping LLC | Hennessey, OK 73742 | Gas Operator | May 2025 |
| 112 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 113 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 114 | T.D. Operating Company, Inc. | New Braunfels, TX 78130 | Oil & Gas Operator | Nov 1999 |
| 115 | T.F. Well Service, L.L.C. | Iowa Park, TX 76367 | Oil Operator | Sep 2025 |
| 116 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 117 | T.J. Oil | | Oil Operator | Oct 2024 |
| 118 | T.L.S. Oil Co. | Hawley, TX 79525 | Oil & Gas Operator | Sep 2025 |
| 119 | T.O. Greer Productions | | Oil & Gas Operator | Aug 2013 |
| 120 | T.O.F., Inc. | | Oil & Gas Operator | Dec 2002 |
| 121 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 122 | T.W. Oil LLC | Fordsville, KY 42343 | Oil & Gas Operator | Dec 2024 |
| 123 | T.W.O. (Taylor Well Operating) | Missoula, MT 59803 | Oil & Gas Operator | Jun 2025 |
| 124 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 125 | Tab Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 126 | Tabbs Bay Production Company | Houston, TX 77019 | Oil Operator | Sep 2025 |
| 127 | Tabco Exploration Inc. | New Orleans, LA 70131 | Oil & Gas Operator | Dec 1998 |
| 128 | Tabco Producing Co. | | Oil & Gas Operator | Jan 1998 |
| 129 | Taber Oil Co | | Oil Operator | Sep 2018 |
| 130 | Taber, Grover E. Jr. | Cocoa, FL 32926 | Gas Operator | Dec 2024 |
| 131 | Tabor Creek Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2025 |
| 132 | Tabor, Danny | Scottsville, KY 42164 | Oil Operator | Dec 2023 |
| 133 | Tabula Rasa Energy, LLC | Allen, TX 75013 | Oil & Gas Operator | Dec 2020 |
| 134 | Tacitus, LLC | Farmington, NM 87401 | Oil & Gas Operator | Jul 2025 |
| 135 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 136 | Tackett & Sons DRLG Contractors, Inc | Salyersville, , K 41465 | Oil & Gas Operator | Dec 2023 |
| 137 | Tacor Resources Inc | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 138 | Tactical Oil & Gas, LLC | Odessa, TX 79768 | Oil & Gas Operator | Sep 2025 |
| 139 | Tactical Operating Company, LLC | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 140 | Tadlock Properites | | Oil & Gas Operator | Jan 1994 |
| 141 | Taft Investment Co., Inc. | Taft, TX 78390 | Oil Operator | Sep 2025 |
| 142 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 143 | Tag Enterprises Inc | Shelocta, PA 15774-0310 | Gas Operator | Dec 2016 |
| 144 | Tag Oil | La Vernia, TX 78121 | Oil Operator | Sep 2025 |
| 145 | Tag Oil Co LLC | Ringling, OK 73456 | Oil & Gas Operator | Jun 2025 |
| 146 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Sep 2025 |
| 147 | Tag Petroleum Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2021 |
| 148 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | May 2025 |
| 149 | Taggart Oil Co., Inc. | | Oil Operator | Oct 1992 |
| 150 | Tahiti PTRS Enrgy Solutions Corp | Long Beach, CA 90807 | Oil Operator | Sep 2025 |
| 151 | Tahoe Corporation | | Gas Operator | Feb 2023 |
| 152 | Tahoe Energy, Inc. | Midland, TX 79703 | Oil & Gas Operator | Jul 1996 |
| 153 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 154 | Tai Inc Dba Trendwell Antrim Inc | | Gas Operator | Jul 2025 |
| 155 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Aug 2024 |
| 156 | Taines, Michael Enterprises | | Oil & Gas Operator | Dec 2021 |
| 157 | Takacs, Ray W. | North Huntington, PA 15642 | Gas Operator | Dec 2024 |
| 158 | Tal-Con, Inc. | Houston, TX 77279 | Oil & Gas Operator | Sep 2025 |
| 159 | Talaria Oil & Gas LLC | Denver, CO 80203 | Oil Operator | Sep 2025 |
| 160 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 161 | Talbott Oil & Gas Co | Tuppers Plains, OH 45783 | Oil & Gas Operator | Dec 2000 |
| 162 | Talbott, Stan C. | Midland, TX 79701 | Oil & Gas Operator | Feb 2005 |
| 163 | Talbott, WM G | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 164 | Talco Midstream Assets, LTD. | | Oil Operator | May 2017 |
| 165 | Taleeho Energy Co. | Normangee, TX 77871 | Oil & Gas Operator | Jun 2003 |
| 166 | Talisman Energy USA Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | May 2016 |
| 167 | Talisman Resources, Inc. | Argyle, TX 76226 | Oil & Gas Operator | Mar 1995 |
| 168 | Tall City Operations III LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2023 |
| 169 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 170 | Tall Dune Resources, LLC | Boerne, TX 78006 | Oil & Gas Operator | Sep 2025 |
| 171 | Tallent, Edwin Miller | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 172 | Talley Resources | | Oil Operator | Jun 1994 |
| 173 | Talley Resources, Inc. | Houma, LA 70360 | Oil & Gas Operator | Apr 1993 |
| 174 | Talley, Don R. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2002 |
| 175 | Talley, W.T. | Olney, TX 76374 | Oil & Gas Operator | May 2005 |
| 176 | Tallgrass Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 177 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 178 | Tallgrass Petroleum Corporation | | Oil & Gas Operator | Feb 2012 |
| 179 | Tallgrass Production Company LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2014 |
| 180 | Tallman Industries Inc | | Oil Operator | Jun 2025 |
| 181 | Tallman Trust Co | | Oil Operator | Jul 2025 |
| 182 | Tally Ho Oil & Gas Co | Sunman, IN 47041 | Oil & Gas Operator | Dec 2021 |
| 183 | Talon Development Company | Boerne, TX 78006 | Oil & Gas Operator | Sep 2007 |
| 184 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 185 | Talon Oil & Gas LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2010 |
| 186 | Talon Production, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2025 |
| 187 | Talos Energy Offshore LLC | | Oil & Gas Operator | Jan 2025 |
| 188 | Talos Ert LLC | | Oil & Gas Operator | Jan 2025 |
| 189 | Talos Gulf Coast Onshore LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 190 | Talos Third Coast LLC | | Oil & Gas Operator | Dec 2024 |
| 191 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 192 | Tam2 Squared Energy Services,LLC | Cisco, TX 76437 | Oil Operator | Sep 2025 |
| 193 | Tam2 Squared Operating, LLC | Cisco, TX 76437 | Oil & Gas Operator | Sep 2025 |
| 194 | Tamarack Energy Inc | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 195 | Tamarack Pet Co, Inc | | Oil Operator | Dec 2020 |
| 196 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 197 | Tamaroa Operating, LLC | Plano, TX 750866937 | Oil & Gas Operator | Jun 2025 |
| 198 | Tamarron Resources, Inc. | Azle, TX 76020 | Oil & Gas Operator | Sep 2025 |
| 199 | Tamco Drilling Inc | | Oil & Gas Operator | Apr 2003 |
| 200 | Tamer Oil & Gas | Seminole, TX 79360 | Oil & Gas Operator | Sep 2025 |