| 1401 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 1402 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 1403 | Trend Oil Co | Petaluma, CA 94954 | Oil & Gas Operator | Feb 2017 |
| 1404 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 1405 | Trendwell Energy Corporation | | Oil & Gas Operator | Nov 2025 |
| 1406 | Trenmor Gas & Oil Co LLC | Frazeysburg, OH 43822 | Oil Operator | Dec 2023 |
| 1407 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 1408 | Trenon Oil & Gas Inc | Oklahoma City, OK 73112-4279 | Oil & Gas Operator | Sep 1996 |
| 1409 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Feb 2026 |
| 1410 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 1411 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 1412 | Tres Operating Co., LLC | Katy, TX 77494 | Oil Operator | Apr 2026 |
| 1413 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 1414 | Tres Roughneckas WTX LLC | MC Camey, TX 79752 | Oil Operator | Apr 2026 |
| 1415 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2026 |
| 1416 | Tresco Energy LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Feb 2026 |
| 1417 | Tresor Petroleum | | Oil & Gas Operator | Sep 1987 |
| 1418 | Tressler John R & IVa M | | Oil Operator | Apr 1989 |
| 1419 | Trestle Creek Properties, LLC | Manchaca, TX 78652 | Oil & Gas Operator | Apr 2026 |
| 1420 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2019 |
| 1421 | Trey Operating Company | MC Camey, TX 79752 | Oil Operator | Jan 2016 |
| 1422 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2026 |
| 1423 | Trey Services, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 1996 |
| 1424 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |
| 1425 | Tri City Oil Co., LLC | Winnie, TX 77665 | Oil Operator | Apr 2026 |
| 1426 | Tri Energy Resources, Inc. | Norman, OK 73070 | Oil Operator | Apr 2026 |
| 1427 | Tri Family Oil Co | | Oil Operator | Dec 2024 |
| 1428 | Tri Investment Company | | Oil Operator | Mar 1980 |
| 1429 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Feb 2026 |
| 1430 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2026 |
| 1431 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 1432 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 1433 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Apr 2026 |
| 1434 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 1435 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2026 |
| 1436 | Tri-City Drilling Joint Venture | Belpre, OH 45714 | Oil & Gas Operator | Dec 2024 |
| 1437 | Tri-City Energy Inc | Wilson, OK 73463-0196 | Oil Operator | Mar 2014 |
| 1438 | Tri-County Oil & Gas, Inc. | Fairmont, WV 26555-0000 | Oil & Gas Operator | Dec 2019 |
| 1439 | Tri-Dyne Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Feb 2000 |
| 1440 | Tri-Ex Corporation | | Oil & Gas Operator | Jan 1985 |
| 1441 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 1442 | Tri-Force Operating, L.L.C. | Royse City, TX 75189 | Oil & Gas Operator | Apr 2026 |
| 1443 | Tri-J Tubulars, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1996 |
| 1444 | Tri-K Production Company, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 1996 |
| 1445 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 1446 | Tri-Par Exploration, Inc. | | Oil Operator | Oct 2001 |
| 1447 | Tri-Production Company | | Oil Operator | Apr 1994 |
| 1448 | Tri-Quest Resources | | Oil & Gas Operator | Feb 1995 |
| 1449 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 1450 | Tri-State Pipeline Service Inc | Ninnekah, OK 73067-0189 | Oil & Gas Operator | Mar 2011 |
| 1451 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 1452 | Tri-State Sales & Production | Rodessa, LA 71069 | Oil & Gas Operator | Dec 2008 |
| 1453 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 1454 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 1455 | Tri-Unity Inc | Sand Springs, OK 74063-4401 | Oil & Gas Operator | Jun 2009 |
| 1456 | Tri-Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 2025 |
| 1457 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Apr 2026 |
| 1458 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |
| 1459 | Triad Energy Corp Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 1460 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 1461 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 1462 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 1463 | Triad O&G, LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |
| 1464 | Triad Oil & Gas Co Inc | | Oil & Gas Operator | Jun 1994 |
| 1465 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 1466 | Triag Energy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2014 |
| 1467 | Triana Energy LLC | Charleston, WV 25301-2815 | Gas Operator | Nov 2018 |
| 1468 | Triangle Development Co | Mahtomedi, MN 55115 | Gas Operator | Feb 1982 |
| 1469 | Triangle Energy Co. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 1470 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 1471 | Triangle J Oil Company | | Oil & Gas Operator | Mar 2007 |
| 1472 | Triangle Oil & G G Cornwell | | Oil & Gas Operator | Nov 1981 |
| 1473 | Triangle Oil Of Hosston | | Oil Operator | Jul 2014 |
| 1474 | Triangle Oil Producers Inc | | Oil & Gas Operator | Jun 1998 |
| 1475 | Triangle Operating Co., Inc. | | Gas Operator | Jan 2000 |
| 1476 | Triangle P Development Corp. | Bronte, TX 76933 | Oil & Gas Operator | Apr 2026 |
| 1477 | Triangle Three Resources L.L.C. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2024 |
| 1478 | Triangle USA Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2021 |
| 1479 | Triax Energy LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2018 |
| 1480 | Tribal Oil Company | | Oil & Gas Operator | Dec 1981 |
| 1481 | Tribar Resources LLC | | Oil & Gas Operator | Feb 2026 |
| 1482 | Tribune Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 1483 | Tricentrol Resources Inc | Englewood, CO 80111 | Oil & Gas Operator | Jun 1984 |
| 1484 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 1485 | Trichel Contracting Company | | Oil & Gas Operator | Sep 1987 |
| 1486 | Trickle Down Oil, Inc. | | Oil & Gas Operator | Feb 2016 |
| 1487 | Trico Energy Corporation | | Oil Operator | May 1984 |
| 1488 | Trico Energy LLC | Hager Hill, KY 41222 | Oil Operator | Dec 2018 |
| 1489 | Trico Oil & Gas Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2026 |
| 1490 | Trico/Tiger Development LLC | | Oil & Gas Operator | Dec 2020 |
| 1491 | Trident Corporation | Woodsboro, TX 78393 | Oil & Gas Operator | Apr 2026 |
| 1492 | Trident Oil & Gas Corp. | | Oil & Gas Operator | Sep 2000 |
| 1493 | Tridon Oil Inc | Lafayette, LA 70505-2305 | Gas Operator | Dec 2013 |
| 1494 | Triesco, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1996 |
| 1495 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 1496 | Triforce Energy LLC | Littleton, CO 80122 | Oil & Gas Operator | Apr 2026 |
| 1497 | Trigeo Energy, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2026 |
| 1498 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 1499 | Trigg Exploratio | | Gas Operator | Feb 1992 |
| 1500 | Trigg Oil Mining Corporation | | Oil & Gas Operator | Dec 2007 |