| 1401 | Tri-Production Company | | Oil Operator | Apr 1994 |
| 1402 | Tri-Quest Resources | | Oil & Gas Operator | Feb 1995 |
| 1403 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 1404 | Tri-State Pipeline Service Inc | Ninnekah, OK 73067-0189 | Oil & Gas Operator | Mar 2011 |
| 1405 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 1406 | Tri-State Sales & Production | Rodessa, LA 71069 | Oil & Gas Operator | Dec 2008 |
| 1407 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 1408 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 1409 | Tri-Unity Inc | Sand Springs, OK 74063-4401 | Oil & Gas Operator | Jun 2009 |
| 1410 | Tri-Valley Oil & Gas Co. | | Oil & Gas Operator | Nov 2023 |
| 1411 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Apr 2024 |
| 1412 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |
| 1413 | Triad Energy Corp. Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 1414 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 1415 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Jan 2024 |
| 1416 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 1417 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 1418 | Triad Oil & Gas Co Inc | | Oil & Gas Operator | Jun 1994 |
| 1419 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 1420 | Triag Energy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2014 |
| 1421 | Triana Energy LLC | Charleston, WV 25301-2815 | Gas Operator | Nov 2018 |
| 1422 | Triangle Development Co | Mahtomedi, MN 55115 | Gas Operator | Feb 1982 |
| 1423 | Triangle Energy Co. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 1424 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 1425 | Triangle J Oil Company | | Oil & Gas Operator | Mar 2007 |
| 1426 | Triangle Oil & G G Cornwell | | Oil & Gas Operator | Nov 1981 |
| 1427 | Triangle Oil Of Hosston | | Oil Operator | Jul 2014 |
| 1428 | Triangle Oil Producers, Inc. | | Oil & Gas Operator | Jun 1998 |
| 1429 | Triangle Operating Co., Inc. | | Gas Operator | Jan 2000 |
| 1430 | Triangle P Development Corp. | Bronte, TX 76933 | Oil & Gas Operator | Apr 2024 |
| 1431 | Triangle Three Resources L.L.C. | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 1432 | Triangle USA Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2021 |
| 1433 | Triax Energy LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2018 |
| 1434 | Tribal Oil Company | | Oil & Gas Operator | Dec 1981 |
| 1435 | Tribar Resources LLC | | Oil Operator | Feb 2024 |
| 1436 | Tribune Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 1437 | Tricentrol Resources Inc | Englewood, CO 80111 | Oil & Gas Operator | Jun 1984 |
| 1438 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2024 |
| 1439 | Trichel Contracting Company | | Oil & Gas Operator | Sep 1987 |
| 1440 | Trickle Down Oil, Inc. | | Oil & Gas Operator | Feb 2016 |
| 1441 | Trico Energy Corporation | | Oil Operator | May 1984 |
| 1442 | Trico Energy LLC | Hager Hill, KY 41222 | Oil Operator | Dec 2018 |
| 1443 | Trico Oil & Gas Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2024 |
| 1444 | Trico/Tiger Development LLC | | Gas Operator | Dec 2017 |
| 1445 | Trident Corporation | Woodsboro, TX 78393 | Oil & Gas Operator | Apr 2024 |
| 1446 | Trident Oil And Gas Corp. | | Oil & Gas Operator | Sep 2000 |
| 1447 | Tridon Oil Inc | Lafayette, LA 70505-2305 | Gas Operator | Dec 2013 |
| 1448 | Triesco, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1996 |
| 1449 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 1450 | Trigeo Energy, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 1451 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 1452 | Trigg Exploratio | | Gas Operator | Feb 1992 |
| 1453 | Trigg Oil Mining Corporation | | Oil & Gas Operator | Dec 2007 |
| 1454 | Trigger'S Disposal LLC | Sayre, OK 73662-2913 | Oil Operator | Sep 2022 |
| 1455 | Trigon Exploration, Inc. | | Oil & Gas Operator | Jan 1999 |
| 1456 | Trilliant Energy Texas LTD | | Oil & Gas Operator | Jun 2020 |
| 1457 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 1458 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Dec 2023 |
| 1459 | Trimble, Don G Dba Trimble Production Company | Houston, TX 77066 | Oil Operator | Feb 2024 |
| 1460 | Trimble, IVal L. | Gridley, KS 66852 | Oil Operator | Dec 2019 |
| 1461 | Trimont Energy LLC | Pittsburgh, PA 15211-1205 | Oil & Gas Operator | Dec 2016 |
| 1462 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 1463 | Trinidad Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 1464 | Trinidad Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 1465 | Trinidad Petroleum Corporation | | Oil & Gas Operator | Apr 1990 |
| 1466 | Trinidad Petroleum, Inc. | Austin, TX 78711 | Oil & Gas Operator | Apr 2024 |
| 1467 | Trinidad Resources, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 1468 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Apr 2024 |
| 1469 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 1470 | Trinity Energy Resources Inc | Houston, TX 77079 | Oil & Gas Operator | Aug 2005 |
| 1471 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 1472 | Trinity Exploration Co | | Oil Operator | Dec 1998 |
| 1473 | Trinity Gas Corporation | Edmond, OK 73003 | Oil & Gas Operator | Apr 2024 |
| 1474 | Trinity Gas Storage, LLC | Flower Mound, TX 75027 | Oil & Gas Operator | Apr 2024 |
| 1475 | Trinity Group LLC | | Oil Operator | Dec 1997 |
| 1476 | Trinity Minerals&Operating Corp. | Abilene, TX 79605 | Oil & Gas Operator | Dec 1995 |
| 1477 | Trinity Oil & Gas Dev Inc | | Oil & Gas Operator | Jun 1994 |
| 1478 | Trinity Oil & Gas Inc | | Oil Operator | Dec 2023 |
| 1479 | Trinity Oil & Gas Producers LLC | | Oil & Gas Operator | Dec 2023 |
| 1480 | Trinity Oil And Gas Production, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2024 |
| 1481 | Trinity Operating & Prod., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1482 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 1483 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 1484 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 1485 | Trinity River Energy, LLC | Houston, TX 77094 | Oil & Gas Operator | Aug 2015 |
| 1486 | Trinity River Operating Company | Oklahoma City, OK 73147 | Oil & Gas Operator | Apr 2024 |
| 1487 | Trinity University & Closuit | Loco Hills, NM 88255 | Oil & Gas Operator | Dec 2002 |
| 1488 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 1489 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76307-0209 | Oil Operator | Jan 2024 |
| 1490 | Trio Oil And Gas Company | Salem, WV 26426 | Oil & Gas Operator | Nov 2021 |
| 1491 | Trio Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Feb 2004 |
| 1492 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 1493 | Trio Petroleum Corp. | Glenville, WV 26351-0880 | Oil & Gas Operator | Jul 2016 |
| 1494 | Trio Petroleum LLC | | Oil & Gas Operator | Nov 2023 |
| 1495 | Trio Production Company, LLC | Stephens, AR 71764 | Oil Operator | Feb 2024 |
| 1496 | Triple "B" Production DRLG Inc | Poynor, TX 75782 | Oil & Gas Operator | Sep 2022 |
| 1497 | Triple "G" Oil Company | Clyde, TX 79510 | Oil & Gas Operator | Apr 1999 |
| 1498 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 1499 | Triple "S" Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Apr 2024 |
| 1500 | Triple "S" Resources Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 1995 |