| 1401 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Jun 2025 |
| 1402 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 1403 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Jun 2025 |
| 1404 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 1405 | Trebole Operating Company | | Oil Operator | Jul 1979 |
| 1406 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Jun 2025 |
| 1407 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 1408 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 1409 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 1410 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 1411 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Feb 2025 |
| 1412 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 1413 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 1414 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 1415 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 1416 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Jun 2025 |
| 1417 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 1418 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Jun 2025 |
| 1419 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 1420 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 1421 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 1422 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 1423 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 1424 | Trend Properties | Olathe, KS 66061 | Gas Operator | Dec 1996 |
| 1425 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 1426 | Trendwell Energy Corporation | | Oil & Gas Operator | Sep 2024 |
| 1427 | Trenmor Gas & Oil Co LLC | Frazeysburg, OH 43822 | Oil Operator | Dec 2022 |
| 1428 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 1429 | Trenon Oil & Gas Inc | Oklahoma City, OK 73112-4279 | Oil & Gas Operator | Sep 1996 |
| 1430 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Mar 2025 |
| 1431 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 1432 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 1433 | Tres Operating Co., LLC | Katy, TX 77494 | Oil Operator | Jun 2025 |
| 1434 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 1435 | Tres Roughneckas WTX LLC | MC Camey, TX 79752 | Oil Operator | Jun 2025 |
| 1436 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2025 |
| 1437 | Tresco Energy LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Jan 2025 |
| 1438 | Tresor Petroleum | | Oil & Gas Operator | Sep 1987 |
| 1439 | Tressler John R & IVa M | | Oil Operator | Apr 1989 |
| 1440 | Trestle Creek Properties, LLC | Manchaca, TX 78652 | Oil & Gas Operator | Jun 2025 |
| 1441 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 1442 | Trey Operating Company | MC Camey, TX 79752 | Oil Operator | Jan 2016 |
| 1443 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 1444 | Trey Services, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 1996 |
| 1445 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Jun 2025 |
| 1446 | Tri City Oil Co., LLC | Kountze, TX 77625 | Oil Operator | Jun 2025 |
| 1447 | Tri Energy Resources, Inc. | Norman, OK 73070 | Oil Operator | Jun 2025 |
| 1448 | Tri Family Oil Co | | Oil Operator | Dec 2024 |
| 1449 | Tri Investment Company | | Oil Operator | Mar 1980 |
| 1450 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Mar 2025 |
| 1451 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jun 2025 |
| 1452 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 1453 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Feb 2025 |
| 1454 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Jun 2025 |
| 1455 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 1456 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 1457 | Tri-City Drilling Joint Venture | Belpre, OH 45714 | Oil & Gas Operator | Dec 2024 |
| 1458 | Tri-City Energy Inc | Wilson, OK 73463-0196 | Oil Operator | Mar 2014 |
| 1459 | Tri-County Oil & Gas, Inc. | Fairmont, WV 26555-0000 | Oil & Gas Operator | Dec 2019 |
| 1460 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 1461 | Tri-Crude Oil & Gas | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2021 |
| 1462 | Tri-Dyne Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Feb 2000 |
| 1463 | Tri-Ex Corporation | | Oil & Gas Operator | Jan 1985 |
| 1464 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 1465 | Tri-Force Operating, L.L.C. | Royse City, TX 75189 | Oil & Gas Operator | Jun 2025 |
| 1466 | Tri-J Tubulars, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1996 |
| 1467 | Tri-K Production Company, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 1996 |
| 1468 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 1469 | Tri-Par Exploration, Inc. | | Oil Operator | Oct 2001 |
| 1470 | Tri-Production Company | | Oil Operator | Apr 1994 |
| 1471 | Tri-Quest Resources | | Oil & Gas Operator | Feb 1995 |
| 1472 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 1473 | Tri-State Pipeline Service Inc | Ninnekah, OK 73067-0189 | Oil & Gas Operator | Mar 2011 |
| 1474 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 1475 | Tri-State Sales & Production | Rodessa, LA 71069 | Oil & Gas Operator | Dec 2008 |
| 1476 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 1477 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 1478 | Tri-Unity Inc | Sand Springs, OK 74063-4401 | Oil & Gas Operator | Jun 2009 |
| 1479 | Tri-Valley Oil & Gas Co. | | Oil & Gas Operator | Mar 2025 |
| 1480 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Jun 2025 |
| 1481 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |
| 1482 | Triad Energy Corp. Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 1483 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 1484 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Mar 2025 |
| 1485 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 1486 | Triad O&G, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 1487 | Triad Oil & Gas Co Inc | | Oil & Gas Operator | Jun 1994 |
| 1488 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 1489 | Triag Energy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2014 |
| 1490 | Triana Energy LLC | Charleston, WV 25301-2815 | Gas Operator | Nov 2018 |
| 1491 | Triangle Development Co | Mahtomedi, MN 55115 | Gas Operator | Feb 1982 |
| 1492 | Triangle Energy Co. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 1493 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 1494 | Triangle J Oil Company | | Oil & Gas Operator | Mar 2007 |
| 1495 | Triangle Oil & G G Cornwell | | Oil & Gas Operator | Nov 1981 |
| 1496 | Triangle Oil Of Hosston | | Oil Operator | Jul 2014 |
| 1497 | Triangle Oil Producers, Inc. | | Oil & Gas Operator | Jun 1998 |
| 1498 | Triangle Operating Co., Inc. | | Gas Operator | Jan 2000 |
| 1499 | Triangle P Development Corp. | Bronte, TX 76933 | Oil & Gas Operator | Jun 2025 |
| 1500 | Triangle Three Resources L.L.C. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2024 |