| 1401 | Atkinson WM H Estate | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2001 |
| 1402 | Atkinson, Clifford III | San Antonio, TX 78217 | Oil & Gas Operator | Dec 1996 |
| 1403 | Atkinson, Jim | Nocona, TX 76255 | Oil & Gas Operator | Jul 2026 |
| 1404 | Atla Energy Inc | Zanesville, OH 43702-2607 | Oil & Gas Operator | Dec 2003 |
| 1405 | Atlanko Oil & Gas Inc | Tulsa, OK 74135-7846 | Oil & Gas Operator | Apr 2026 |
| 1406 | Atlanta Exploration Co. | | Oil & Gas Operator | Oct 2001 |
| 1407 | Atlantic & Gulf Petroleum Co. | Houston, TX 77002 | Gas Operator | Mar 1991 |
| 1408 | Atlantic Energy Corp Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 1991 |
| 1409 | Atlantic Exploration, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2015 |
| 1410 | Atlantic Oil Company | | Oil & Gas Operator | Dec 2025 |
| 1411 | Atlantic Operating II, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 1412 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 1413 | Atlantic Petroleum Co. | | Oil Operator | Mar 2000 |
| 1414 | Atlantic Resources Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 1415 | Atlantic Richfield Company | Houston, TX 77079 | Oil & Gas Operator | Dec 2016 |
| 1416 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jul 2026 |
| 1417 | Atlantis Oil Cor | | Oil Operator | Sep 1989 |
| 1418 | Atlas Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2019 |
| 1419 | Atlas Eagle Ford Oper Co, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | May 2020 |
| 1420 | Atlas Energy Corp | | Oil & Gas Operator | Nov 2005 |
| 1421 | Atlas Energy Corporation (Del.) | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2026 |
| 1422 | Atlas Energy Group Inc | Uniontown, OH 44685-9575 | Oil & Gas Operator | Dec 2011 |
| 1423 | Atlas Fuel Supply, LTD. | Houston, TX 77269 | Oil Operator | Jul 2026 |
| 1424 | Atlas Growth Texas, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2019 |
| 1425 | Atlas Noble LLC | Fort Worth, TX 76116-5423 | Oil & Gas Operator | Jun 2020 |
| 1426 | Atlas Oil & Gas Exploration, LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Aug 2003 |
| 1427 | Atlas Oil Co, Inc | | Oil Operator | Dec 2023 |
| 1428 | Atlas Oil Company, LLC | Versailles, KY 40383 | Oil Operator | Dec 2023 |
| 1429 | Atlas Oil Exploration, Inc | | Oil & Gas Operator | Dec 1977 |
| 1430 | Atlas Oil Inc | Oklahoma City, OK 73154-0467 | Oil & Gas Operator | Aug 2008 |
| 1431 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2026 |
| 1432 | Atlas Production Services | | Oil & Gas Operator | Feb 1999 |
| 1433 | Atlas Resources Inc | Coraopolis, PA 15108-0611 | Oil & Gas Operator | Dec 2007 |
| 1434 | Atlas Resources LLC | Pittsburgh, PA 15275-1033 | Oil & Gas Operator | Jun 2018 |
| 1435 | Atls Production Company LLC | Fort Worth, TX 76102-7426 | Gas Operator | Sep 2020 |
| 1436 | Atmic, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2008 |
| 1437 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 1438 | Atnipp, H. L. | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 1439 | Atoka Energy LLC | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2026 |
| 1440 | Atoka Operating Permian, LLC | Addison, TX 75001 | Oil & Gas Operator | Sep 2023 |
| 1441 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2026 |
| 1442 | Atp Oil & Gas Corporation | Houston, TX 77027 | Oil & Gas Operator | Jun 2008 |
| 1443 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jul 2026 |
| 1444 | Atropos Production Corporation | Dallas, TX 75225 | Oil & Gas Operator | Jul 2026 |
| 1445 | Attaway Energy Group, Inc. | | Oil & Gas Operator | Aug 1995 |
| 1446 | Atteberry Engineering | Edmond, OK 73013-6624 | Oil & Gas Operator | Mar 2008 |
| 1447 | Attica Central School District | Attica, NY 14011 | Gas Operator | Dec 2025 |
| 1448 | Attica Gas Ventu | | Oil & Gas Operator | Dec 1995 |
| 1449 | Atwa Energy Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1996 |
| 1450 | Atwell Technical Services, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 1451 | Atwell, David L. | Duncan, OK 73533 | Oil & Gas Operator | Jul 2003 |
| 1452 | Atwood Energy Inc | Port Washington, OH 43837-9214 | Oil & Gas Operator | Dec 1993 |
| 1453 | Atwood Resources Inc | Houston, TX 72151 | Oil & Gas Operator | Dec 1993 |
| 1454 | Auburn Enlarged Central School District | Auburn, NY 13021 | Gas Operator | Dec 2025 |
| 1455 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 1456 | Auden Oil Inc. | Hardin, TX 77561 | Oil Operator | Jul 2026 |
| 1457 | Audrey Oil & Gas LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2026 |
| 1458 | Augerhead Oil LLC | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2025 |
| 1459 | August Oil | Plano, TX 75093 | Oil & Gas Operator | Aug 2003 |
| 1460 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 1461 | Augusta Oil & Gas Inc | Abilene, TX 79604 | Oil & Gas Operator | Dec 2015 |
| 1462 | Augustus Energy Partners LLC | Billings, MT 59102 | Oil & Gas Operator | Oct 2013 |
| 1463 | Augustus Oil And Gas Corporation | Austin, TX 78731 | Oil & Gas Operator | Jul 2026 |
| 1464 | Aunix Operating, LLC | Tomball, TX 77377 | Oil Operator | Jul 2026 |
| 1465 | Auro USA, Inc. | | Oil Operator | Dec 2024 |
| 1466 | Aurora Energy LTD | Traverse City, MI 49684 | Oil & Gas Operator | Dec 2006 |
| 1467 | Aurora Exploration & Prod Co | Whitesboro, TX 76273 | Oil Operator | Jul 2026 |
| 1468 | Aurora Gas LLC. | | Oil & Gas Operator | Dec 2017 |
| 1469 | Aurora Gas, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jan 2000 |
| 1470 | Aurora Operating, LLC | Houston, TX 77010 | Oil Operator | Jul 2026 |
| 1471 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 1472 | Aurora Resources Corporation | Corpus Christ, TX 78401 | Oil & Gas Operator | Jul 2026 |
| 1473 | Aurora USA Development, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 1474 | Aus-Tex Exploration, Inc | | Oil & Gas Operator | May 2026 |
| 1475 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 1476 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 1477 | Ausmus & Clark Oil | | Oil Operator | Jul 2022 |
| 1478 | Auster Oil And Gas, Inc. | | Oil & Gas Operator | Mar 1989 |
| 1479 | Auster Oil And Gas, Inc. Et Al | | Oil & Gas Operator | May 2001 |
| 1480 | Austex Energy, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Apr 1993 |
| 1481 | Austin E. Stewart | | Oil & Gas Operator | Feb 1979 |
| 1482 | Austin Energy LLC | | Oil Operator | Mar 2026 |
| 1483 | Austin Energy Operations, Inc. | Corpus Christ, TX 78410 | Oil & Gas Operator | Jul 2026 |
| 1484 | Austin Minerals Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Jul 2026 |
| 1485 | Austin Oil Company | | Oil & Gas Operator | Dec 2000 |
| 1486 | Austin Operating, LLC. | Chicago, IL 60622 | Oil Operator | Jul 2026 |
| 1487 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 1488 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 1489 | Austin Ridge Energy Corporation | Houston, TX 77224 | Oil & Gas Operator | Jul 2026 |
| 1490 | Austin Robert L | Stafford, KS 67578 | Oil & Gas Operator | Dec 1999 |
| 1491 | Austin, Chas W | | Oil Operator | Jan 2009 |
| 1492 | Austin, Dewey | Burkburnett, TX 76354 | Oil & Gas Operator | Nov 1996 |
| 1493 | Austin, John F. | Baton Rouge, LA 70879 | Oil Operator | May 1992 |
| 1494 | Austin, Robert E. | Miami, OK 74354 | Oil Operator | Dec 1995 |
| 1495 | Austral Oil & Exploration, Inc | | Oil & Gas Operator | Jun 2004 |
| 1496 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 1497 | Australis TMS Inc. | | Oil & Gas Operator | Dec 2024 |
| 1498 | Auterra Operating, LLC | Friendswood, TX 77549 | Oil & Gas Operator | Jul 2026 |
| 1499 | Autry C Stephens | Midland, TX 79701 | Oil & Gas Operator | Dec 2001 |
| 1500 | Autry Producing Co. | Cisco, TX 76437 | Oil & Gas Operator | Aug 2008 |