| 1201 | Tortuga Operating Company | Houston, TX 77055 | Oil & Gas Operator | Apr 2024 |
| 1202 | Tosco Enhanced Oil Recovery Corporation | | Oil Operator | Dec 1981 |
| 1203 | Toshic Dynamics, LLC | Scottsdale, AZ 85251 | Oil Operator | Nov 2006 |
| 1204 | Totah Production | Duncan, OK 73533-9406 | Oil Operator | Mar 2015 |
| 1205 | Total E&P USA, Inc. | Houston, TX 77210 | Oil & Gas Operator | Nov 2011 |
| 1206 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 1207 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 1208 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 1209 | Toto Energy, LLC | Spring, TX 77380 | Oil & Gas Operator | Dec 2019 |
| 1210 | Totten Resources | | Oil Operator | Sep 2007 |
| 1211 | Touchstone Properties, Inc. | | Oil Operator | Mar 1988 |
| 1212 | Touchstone Resources USA, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2006 |
| 1213 | Touchstone Trading & Transportation Inc | | Oil Operator | Dec 2023 |
| 1214 | Tower Drilling Corporation | | Oil & Gas Operator | Dec 2021 |
| 1215 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 1216 | Tower Oil & Gas Company, Inc. | Englewood, CO 80111 | Oil & Gas Operator | May 2001 |
| 1217 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Apr 2024 |
| 1218 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 1219 | Town Of Aurora | East Aurora, NY 14052 | Gas Operator | Dec 2022 |
| 1220 | Town Of Chautauqua | Mayville, NY 14757 | Gas Operator | Dec 2022 |
| 1221 | Town Of Newstead | Akron, NY 14001 | Gas Operator | Dec 2022 |
| 1222 | Town Of West Seneca | West Seneca, NY 14224 | Gas Operator | Dec 2022 |
| 1223 | Town Oil Company | Paola, KS 66071 | Oil & Gas Operator | Dec 2023 |
| 1224 | Towne Exploration Company LP | | Oil & Gas Operator | Dec 2023 |
| 1225 | Townes, Don | Clarksville, TX 75426 | Oil & Gas Operator | Apr 2024 |
| 1226 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 1227 | Townsend Operating Company | | Oil & Gas Operator | Jan 2008 |
| 1228 | Townsend V E | Ada, OK 74820 | Oil & Gas Operator | May 2013 |
| 1229 | Townsend, R. F. Trustee | Dallas, TX 75201 | Oil & Gas Operator | Dec 1994 |
| 1230 | TPC Exploration, LLC | May, TX 76857 | Oil & Gas Operator | Apr 2024 |
| 1231 | TPC Operating Inc. | | Oil & Gas Operator | Nov 2023 |
| 1232 | Tpet Management Inc. | Dallas, TX 75204 | Oil & Gas Operator | Dec 1997 |
| 1233 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 1234 | TR Crude LLC | Independence, KS 67301 | Oil Operator | Oct 2023 |
| 1235 | TR Offshore, LLC | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Apr 2024 |
| 1236 | TR Operating LLC | Graham, TX 76450 | Oil Operator | Feb 2024 |
| 1237 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 1238 | Trace Oil & Gas LP | Cement, OK 73017-0563 | Oil & Gas Operator | Jan 2024 |
| 1239 | Trace Operating Co & R Hudson | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2013 |
| 1240 | Trace Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 1241 | Trace Operators, Inc. | | Oil & Gas Operator | Nov 2023 |
| 1242 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 1243 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 1244 | Trachtenberg Daniel S | Houston, TX 77071-2608 | Oil Operator | Dec 2023 |
| 1245 | Tracker Mineral | Clyde, TX 79510 | Oil & Gas Operator | Apr 2024 |
| 1246 | Tracker Oil & Gas, Inc. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2024 |
| 1247 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 1248 | Tracker Resource Development II, LLC | | Oil & Gas Operator | Feb 2011 |
| 1249 | Trackstar Energies LLC | Colorado Springs, CO 80919 | Oil Operator | Mar 2023 |
| 1250 | Tracy & Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 1251 | Tracy Co. | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2022 |
| 1252 | Tracy Operating Co., LLC | Rockdale, TX 76567 | Oil & Gas Operator | Apr 2024 |
| 1253 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Apr 2024 |
| 1254 | Trade & Development Corp | | Oil & Gas Operator | Nov 1996 |
| 1255 | Tradestar Energy, Inc. | Hot Springs, AR 71913 | Oil Operator | Feb 2021 |
| 1256 | Tradition Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 1257 | Tradition Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2017 |
| 1258 | Trafalgar House Oil & Gas Inc. | Houston, TX 77002-7346 | Oil & Gas Operator | Jan 1992 |
| 1259 | Trahan Petroleum Inc | | Oil Operator | Nov 2023 |
| 1260 | Trail Mountain, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Jan 2016 |
| 1261 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jan 2024 |
| 1262 | Trail Ridge Energy PRTNS II LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jun 2017 |
| 1263 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Jan 2024 |
| 1264 | Trailblazer Energy Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 1265 | Trailhead Exploration LLC | | Oil & Gas Operator | Jan 2024 |
| 1266 | Traillour Oil Co. | | Oil & Gas Operator | Mar 1990 |
| 1267 | Trans Atlantic Ener Corp | Caldwell, OH 43724 | Oil & Gas Operator | Dec 1993 |
| 1268 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 1269 | Trans Energy, Inc. | St. Marys, WV 26170 | Oil & Gas Operator | Dec 2017 |
| 1270 | Trans Ocean Oil, Inc. | Houston, TX 77252 | Oil & Gas Operator | Oct 1980 |
| 1271 | Trans Oil Marketing LLC | Abilene, TX 79602 | Oil Operator | Aug 2023 |
| 1272 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 1273 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2024 |
| 1274 | Trans Resource D | | Oil Operator | May 1991 |
| 1275 | Trans Terra Corp., International | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2009 |
| 1276 | Trans Texas Minerals Company | Austin, TX 78714 | Oil & Gas Operator | Aug 1999 |
| 1277 | Trans-Gulf Petroleum Corp | | Oil & Gas Operator | Sep 1999 |
| 1278 | Trans-Pacific Oil & Gas Inc. | | Oil & Gas Operator | Mar 1982 |
| 1279 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 1280 | Trans-Sabine Pipeline Corp | | Oil Operator | Mar 2009 |
| 1281 | Trans-Texas Energy Group LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2015 |
| 1282 | Trans-Western Expl. Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 1993 |
| 1283 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Dec 2023 |
| 1284 | Transamerica Energy Corp. | Atlanta, GA 30356 | Oil & Gas Operator | Apr 2024 |
| 1285 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 1286 | Transamerica Oil Corporation | Hutchinson, KS 67504 | Gas Operator | Dec 2023 |
| 1287 | Transamerican Energy/Toce Oil | | Oil & Gas Operator | Dec 1994 |
| 1288 | Transamerican Natural Gas Corp. | Houston, TX 77032 | Oil & Gas Operator | Aug 2000 |
| 1289 | Transamerican-Swepi-Toce Oil | | Oil & Gas Operator | Apr 1990 |
| 1290 | Transatlantic Petr (USA) Corp. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 1291 | Transco Exploration Company | | Oil & Gas Operator | Jul 1989 |
| 1292 | Transco Oil & Gas Inc. | | Gas Operator | Dec 1992 |
| 1293 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 1294 | Transcontinental Company | Fort Worth, TX 76161-1804 | Oil & Gas Operator | Oct 2023 |
| 1295 | Transcontinental Gas P/L Corp. | | Oil & Gas Operator | Dec 2009 |
| 1296 | Transcontinental Gas Pipeline Co LLC | | Oil Operator | Jan 2024 |
| 1297 | Transcontinental Minerals Corp. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2008 |
| 1298 | Transcontinental Oil & Gas Inc | Aurora, OH 44202 | Oil & Gas Operator | Dec 2023 |
| 1299 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 1300 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |