| 1401 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 1402 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |
| 1403 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 1404 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 1405 | Transhorizon Energy Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2023 |
| 1406 | Transit Energy Inc | North Lawrence, OH 44666 | Oil & Gas Operator | Dec 2024 |
| 1407 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Feb 2026 |
| 1408 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 1409 | Transp Investment Group | Fairview, PA 16415-1530 | Gas Operator | Dec 1999 |
| 1410 | Transpac Petroleum Inc. | | Oil & Gas Operator | Dec 1995 |
| 1411 | Transpacific Energy, LLC | Katy, TX 77450 | Oil & Gas Operator | Feb 2026 |
| 1412 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 1413 | Transpetco Transport Company | Shreveport, LA 71101-5370 | Oil Operator | Jun 2008 |
| 1414 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 1415 | Transworld Expl. & Prod., Inc. | | Oil & Gas Operator | Mar 2004 |
| 1416 | Transworld Systems Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 1417 | Trap Rock Oil Company | Cambridge, MA 02138 | Oil & Gas Operator | Nov 2005 |
| 1418 | Trap Rock Oil, LTD. | Houston, TX 77005 | Oil & Gas Operator | Feb 2026 |
| 1419 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 1420 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 1421 | Travco Well Servicing LLC | Okmulgee, OK 74447 | Oil Operator | Nov 2025 |
| 1422 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Feb 2026 |
| 1423 | Travell Energy, Inc | | Oil Operator | Dec 2023 |
| 1424 | Traver Oil & Gas Corporation | | Oil & Gas Operator | Sep 2000 |
| 1425 | Traver Oil Company | | Oil & Gas Operator | Sep 2000 |
| 1426 | Traver-Patterson Petroleum Inc | | Oil & Gas Operator | May 1990 |
| 1427 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 1428 | Traverse Oil Co | | Oil & Gas Operator | Nov 1983 |
| 1429 | Traverse Oil Co And Federal Oil Co | | Oil & Gas Operator | Nov 1983 |
| 1430 | Travis Coomer DRLG Co | | Oil Operator | Dec 2023 |
| 1431 | Travis E. Duren | | Oil Operator | Jul 1995 |
| 1432 | Travis Oil Co | Los Angeles, CA 90024 | Oil Operator | Jan 1990 |
| 1433 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Feb 2026 |
| 1434 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 1435 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 1436 | Traxler, Joyce | Le Roy, NY 14482 | Gas Operator | Dec 2024 |
| 1437 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 1438 | TRC Cypress Group LLC | | Oil & Gas Operator | Nov 2025 |
| 1439 | TRC Operating Company Inc. | | Oil & Gas Operator | Dec 2025 |
| 1440 | Tre'J Exploration, Inc. | | Gas Operator | Dec 1991 |
| 1441 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Feb 2026 |
| 1442 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 1443 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Feb 2026 |
| 1444 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 1445 | Treber Oil Corporation | | Oil & Gas Operator | Sep 2000 |
| 1446 | Trebole Operating Company | | Oil Operator | Jul 1979 |
| 1447 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 1448 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 1449 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 1450 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 1451 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Feb 2026 |
| 1452 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 1453 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Feb 2026 |
| 1454 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 1455 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 1456 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 1457 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |
| 1458 | Tremblay, Gail R. & Alan B. | Van Etten, NY 14889 | Gas Operator | Dec 2024 |
| 1459 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 1460 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Feb 2026 |
| 1461 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 1462 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 1463 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 1464 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 1465 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 1466 | Trend Properties | Olathe, KS 66061 | Gas Operator | Dec 1996 |
| 1467 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 1468 | Trendwell Energy Corporation | | Oil & Gas Operator | Oct 2025 |
| 1469 | Trenmor Gas & Oil Co LLC | Frazeysburg, OH 43822 | Oil Operator | Dec 2023 |
| 1470 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 1471 | Trenon Oil & Gas Inc | Oklahoma City, OK 73112-4279 | Oil & Gas Operator | Sep 1996 |
| 1472 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Nov 2025 |
| 1473 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 1474 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 1475 | Tres Operating Co., LLC | Katy, TX 77494 | Oil Operator | Feb 2026 |
| 1476 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 1477 | Tres Roughneckas WTX LLC | MC Camey, TX 79752 | Oil Operator | Feb 2026 |
| 1478 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 1479 | Tresco Energy LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Nov 2025 |
| 1480 | Tresor Petroleum | | Oil & Gas Operator | Sep 1987 |
| 1481 | Tressler John R & IVa M | | Oil Operator | Apr 1989 |
| 1482 | Trestle Creek Properties, LLC | Manchaca, TX 78652 | Oil & Gas Operator | Feb 2026 |
| 1483 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 1484 | Trey Operating Company | MC Camey, TX 79752 | Oil Operator | Jan 2016 |
| 1485 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 1486 | Trey Services, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 1996 |
| 1487 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 1488 | Tri City Oil Co., LLC | Winnie, TX 77665 | Oil Operator | Feb 2026 |
| 1489 | Tri Energy Resources, Inc. | Norman, OK 73070 | Oil Operator | Feb 2026 |
| 1490 | Tri Family Oil Co | | Oil Operator | Dec 2024 |
| 1491 | Tri Investment Company | | Oil Operator | Mar 1980 |
| 1492 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Nov 2025 |
| 1493 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 1494 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 1495 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 1496 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Feb 2026 |
| 1497 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 1498 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 1499 | Tri-City Drilling Joint Venture | Belpre, OH 45714 | Oil & Gas Operator | Dec 2024 |
| 1500 | Tri-City Energy Inc | Wilson, OK 73463-0196 | Oil Operator | Mar 2014 |