| 1301 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 1302 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 1303 | Transhorizon Energy Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2023 |
| 1304 | Transit Energy Inc | West Salem, OH 44287 | Oil & Gas Operator | Dec 2022 |
| 1305 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Apr 2024 |
| 1306 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 1307 | Transpac Petroleum Inc. | | Oil & Gas Operator | Dec 1995 |
| 1308 | Transpacific Energy, LLC | Katy, TX 77450 | Oil & Gas Operator | Apr 2024 |
| 1309 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 1310 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 1311 | Transworld Expl. & Prod., Inc. | | Oil & Gas Operator | Mar 2004 |
| 1312 | Transworld Systems Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
| 1313 | Trap Rock Oil Company | Cambridge, MA 02138 | Oil & Gas Operator | Nov 2005 |
| 1314 | Trap Rock Oil, LTD. | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 1315 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 1316 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 1317 | Travco Well Servicing LLC | | Oil Operator | Dec 2023 |
| 1318 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Apr 2024 |
| 1319 | Travell Energy, Inc | | Oil Operator | Dec 2010 |
| 1320 | Traver Oil & Gas Corporation | | Oil & Gas Operator | Sep 2000 |
| 1321 | Traver Oil Company | | Oil & Gas Operator | Sep 2000 |
| 1322 | Traver-Patterson Petroleum Inc | | Oil & Gas Operator | Apr 1990 |
| 1323 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 1324 | Traverse Oil Co And Federal Oil Co | | Oil & Gas Operator | Nov 1983 |
| 1325 | Traverse Oil Co. | | Oil & Gas Operator | Nov 1983 |
| 1326 | Travis | Houston, TX 77057 | Oil Operator | Apr 2024 |
| 1327 | Travis E. Duren | | Oil Operator | Jul 1995 |
| 1328 | Travis Oil Co | Los Angeles, CA 90024 | Oil Operator | Jan 1990 |
| 1329 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Apr 2024 |
| 1330 | Travis Peak Resources LLC | Austin, TX 78759-7279 | Oil & Gas Operator | Dec 2023 |
| 1331 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 1332 | Traxler, Joyce | Le Roy, NY 14482 | Gas Operator | Dec 2022 |
| 1333 | Traylor Equipment, LLC | Smackover, AR 71762 | Oil Operator | Aug 2007 |
| 1334 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Dec 2023 |
| 1335 | TRC Cypress Group LLC | | Oil & Gas Operator | Nov 2023 |
| 1336 | TRC Operating Company Inc. | | Oil & Gas Operator | Dec 2023 |
| 1337 | Tre'J Exploration, Inc. | | Gas Operator | Dec 1991 |
| 1338 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Apr 2024 |
| 1339 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 1340 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Apr 2024 |
| 1341 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 1342 | Trebole Operating Company | | Oil Operator | Jul 1979 |
| 1343 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 1344 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 1345 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 1346 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 1347 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2024 |
| 1348 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 1349 | Trek Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2024 |
| 1350 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 1351 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 1352 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 1353 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 1354 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 1355 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 1356 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 1357 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 1358 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 1359 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 1360 | Trendwell Energy Corporation | | Oil & Gas Operator | Feb 2024 |
| 1361 | Trenmor Gas & Oil Co LLC | Granville, OH 43023 | Oil Operator | Dec 2022 |
| 1362 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 1363 | Trenon Oil & Gas Inc | Oklahoma City, OK 73112-4279 | Oil & Gas Operator | Sep 1996 |
| 1364 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Dec 2023 |
| 1365 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 1366 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 1367 | Tres Operating Co., LLC | Katy, TX 77494 | Oil Operator | Apr 2024 |
| 1368 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 1369 | Tres Roughneckas WTX LLC | Houston, TX 77009 | Oil Operator | Apr 2024 |
| 1370 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 1371 | Tresco Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 1372 | Tresor Petroleum | | Oil & Gas Operator | Sep 1987 |
| 1373 | Tressler John R & IVa M | | Oil Operator | Apr 1989 |
| 1374 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 1375 | Trey Operating Company | MC Camey, TX 79752 | Oil Operator | Jan 2016 |
| 1376 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2023 |
| 1377 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 1378 | Tri City Oil Co., LLC | Baytown, TX 77520 | Oil Operator | Apr 2024 |
| 1379 | Tri Energy Resources, Inc. | Norman, OK 73070 | Oil Operator | Apr 2024 |
| 1380 | Tri Family Oil Co | | Oil Operator | Dec 2022 |
| 1381 | Tri Investment Company | | Oil Operator | Mar 1980 |
| 1382 | Tri Production Inc | Healdton, OK 73438-0177 | Oil & Gas Operator | Dec 2023 |
| 1383 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 1384 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 1385 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 1386 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Apr 2024 |
| 1387 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 1388 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 1389 | Tri-City Drilling Joint Venture | Belpre, OH 45714 | Oil & Gas Operator | Dec 2023 |
| 1390 | Tri-City Energy Inc | | Oil Operator | Mar 2014 |
| 1391 | Tri-County Oil & Gas, Inc. | Fairmont, WV 26555-0000 | Oil & Gas Operator | Dec 2019 |
| 1392 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 1393 | Tri-Crude Oil & Gas | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2021 |
| 1394 | Tri-Ex Corporation | | Oil & Gas Operator | Jan 1985 |
| 1395 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 1396 | Tri-Force Operating, L.L.C. | Royse City, TX 75189 | Oil & Gas Operator | Apr 2024 |
| 1397 | Tri-J Tubulars, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1996 |
| 1398 | Tri-K Production Company, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 1996 |
| 1399 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 1400 | Tri-Par Exploration, Inc. | | Oil Operator | Oct 2001 |