| 1401 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 1402 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 1403 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1404 | Arklatx Operating Company, Inc | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 1405 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Apr 2010 |
| 1406 | Arkoma Holding Corporation | Oklahoma City, OK 73102-5684 | Gas Operator | Jul 2007 |
| 1407 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Sep 2025 |
| 1408 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 1409 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 1410 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 1411 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2025 |
| 1412 | Arkoma, Sandra | Pampa, TX 79066 | Oil & Gas Operator | May 1995 |
| 1413 | Arleand Resources | Overton, TX 75684 | Oil & Gas Operator | Dec 2025 |
| 1414 | Arledge & Young, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Feb 1999 |
| 1415 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2019 |
| 1416 | Arlen Corporation | Houston, TX 77077 | Oil & Gas Operator | Mar 2008 |
| 1417 | Arlian, Inc. | Denver, CO 80202 | Oil Operator | Feb 1998 |
| 1418 | Arlington Storage Company, LLC | | Gas Operator | Dec 2008 |
| 1419 | Arlis Scogin | | Oil Operator | Jul 1985 |
| 1420 | Arlis Scogin Et Al | | Oil & Gas Operator | Jan 1990 |
| 1421 | Armac Resources | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2011 |
| 1422 | Armac Resources LLC | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2024 |
| 1423 | Armada Operating, LLC | Dallas, TX 75254 | Oil Operator | Aug 2015 |
| 1424 | Armadilla Oil & Gas, LLC | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 1425 | Armca Oil & Gas LLC | | Oil Operator | Sep 2025 |
| 1426 | Armidillo Oil Company | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 1427 | Armitage Jerald Dba Jem Oilfield Services LLC | Bartlesville, OK 74003 | Oil Operator | Sep 2025 |
| 1428 | Armor Energy II LLC | Tulsa, OK 74145 | Oil & Gas Operator | Oct 2025 |
| 1429 | Armor Energy LLC | Tulsa, OK 74146 | Oil & Gas Operator | Jun 2022 |
| 1430 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 1431 | Armor Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 1432 | Armor SWD Inc | Oklahoma City, OK 73112 | Oil Operator | May 2020 |
| 1433 | Armour Properties | Houston, TX 77056 | Oil & Gas Operator | May 1994 |
| 1434 | Armour Resource Holdings, LTD. | Houston, TX 77046 | Oil & Gas Operator | Nov 1994 |
| 1435 | Armour, Widd | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 1436 | Armstrong & Jack | | Gas Operator | Jun 1997 |
| 1437 | Armstrong & McLeod Company | Okmulgee, OK 74447-0819 | Oil & Gas Operator | Dec 1993 |
| 1438 | Armstrong Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 1439 | Armstrong Gas Co LLC | Kittanning, PA 16201-2269 | Oil & Gas Operator | Dec 2018 |
| 1440 | Armstrong Oil Inc. | | Oil & Gas Operator | Dec 2020 |
| 1441 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Oct 2025 |
| 1442 | Armstrong Petroleum Corporation | | Oil & Gas Operator | Sep 2025 |
| 1443 | Armstrong Robert D | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 1444 | Arnaudville Company Inc. | | Oil & Gas Operator | Apr 1995 |
| 1445 | Arnell Oil Company | Centennial, CO 80122 | Oil & Gas Operator | Sep 2025 |
| 1446 | Arnett Saltwater Disposal LLC | Shattuck, OK 73858-0848 | Oil Operator | Dec 2021 |
| 1447 | Arnold & Assoc-D&D-Coquina | | Oil Operator | Oct 1985 |
| 1448 | Arnold N Krebbs | | Oil Operator | Aug 2025 |
| 1449 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 1450 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 1451 | Arnold Prodn. | | Oil & Gas Operator | Jan 2006 |
| 1452 | Arnold Ridge LLC | | Oil Operator | Dec 2023 |
| 1453 | Arnot Oil Company, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 1454 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 1455 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 1456 | Arp Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 1457 | Arp Oklahoma LLC | Fort Worth, TX 76102-7426 | Oil & Gas Operator | Feb 2020 |
| 1458 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 1459 | Arp Production Company, LLC | Fort Worth, TX 76102 | Gas Operator | Sep 2025 |
| 1460 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 1461 | Arps Petroleum C | | Oil Operator | Jul 1987 |
| 1462 | Array Operating, LLC | | Oil & Gas Operator | Mar 2017 |
| 1463 | Arrco Operating, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Dec 2025 |
| 1464 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 1465 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 1466 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 1467 | Arrington Production Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 1468 | Arrington Properties Inc | Edmond, OK 73034-3724 | Oil & Gas Operator | May 1996 |
| 1469 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 1470 | Arriola Operating & Consltg Inc. | Dallas, TX 75248 | Oil Operator | Dec 2025 |
| 1471 | Arris Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2016 |
| 1472 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Oct 2025 |
| 1473 | Arrow Exploration Company | Plano, TX 75075 | Oil & Gas Operator | Dec 2004 |
| 1474 | Arrow Oil & Gas, Inc. | Norman, OK 73070 | Oil Operator | Mar 2010 |
| 1475 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 2025 |
| 1476 | Arrow Oil Operat | | Oil Operator | Nov 1991 |
| 1477 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 1478 | Arrow Production Company | Tulsa, OK 74108 | Oil & Gas Operator | Dec 2009 |
| 1479 | Arrow Rock Energy, LLC | Houston, TX 77079 | Oil & Gas Operator | Mar 2018 |
| 1480 | Arrow S Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 1481 | Arrowhead Energy Exp., LLC | Baton Rouge, LA 70816 | Oil & Gas Operator | Nov 2006 |
| 1482 | Arrowhead Energy Expl, LLC | | Oil & Gas Operator | May 2013 |
| 1483 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2025 |
| 1484 | Arrowhead Enterprises, Inc. | Baton Rouge, LA 70816 | Oil & Gas Operator | Apr 2001 |
| 1485 | Arrowhead Exploration Company | Olney, TX 76374 | Oil Operator | Dec 1995 |
| 1486 | Arrowhead Exploration, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 1487 | Arrowhead Gas Producers Inc | Olean, NY 14760-3355 | Gas Operator | Dec 1992 |
| 1488 | Arrowhead Industries | Horse Cave, KY 42749 | Oil Operator | Dec 2011 |
| 1489 | Arrowhead Oil & Gas Co | Gambier, OH 43022 | Oil & Gas Operator | Dec 2010 |
| 1490 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Dec 2025 |
| 1491 | Arrowhead Petrol | | Oil & Gas Operator | Feb 1992 |
| 1492 | Arrowhead Petroleum Of Kansas, Inc. | Wellington, KS 67152 | Oil & Gas Operator | Oct 2004 |
| 1493 | Arrowhead Productions, LP | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2025 |
| 1494 | Arrowhead Resources USA LTD | | Oil & Gas Operator | Dec 1992 |
| 1495 | Arrowhead Resources, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 1496 | Arrowood Production Inc | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2008 |
| 1497 | Arroyo Petroleum | Wichita, KS 67205 | Oil Operator | Mar 2001 |
| 1498 | Arsenal Energy USA Inc. | | Oil & Gas Operator | Aug 2016 |
| 1499 | Arsenal Resources LLC | Wexford, PA 15090 | Oil & Gas Operator | Dec 2021 |
| 1500 | Art Machin & Associates, Inc. | | Oil & Gas Operator | Jul 1997 |