| 1401 | Mid Gulf Incorpo | | Oil & Gas Operator | Nov 1993 |
| 1402 | Mid Kansas Explo | | Oil Operator | Apr 1994 |
| 1403 | Mid Kansas Gas Gathering | | Gas Operator | Dec 2023 |
| 1404 | Mid Louisiana Gas Company | | Oil & Gas Operator | Oct 2002 |
| 1405 | Mid Michigan Gas Storage Co | | Oil & Gas Operator | Mar 2022 |
| 1406 | Mid South Oil & Gas Expl Inc | | Oil & Gas Operator | Jan 1992 |
| 1407 | Mid States Energ | | Oil Operator | Aug 1985 |
| 1408 | Mid States Gener | | Oil Operator | Apr 1988 |
| 1409 | Mid Texas Natural Gas | Kyle, TX 78640 | Oil & Gas Operator | May 2019 |
| 1410 | Mid Western Oil | | Oil Operator | Oct 1989 |
| 1411 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 1412 | Mid-America Resources Corporation | | Oil Operator | Jan 2019 |
| 1413 | Mid-America Resources, Inc. | | Oil & Gas Operator | Feb 2008 |
| 1414 | Mid-America/Hughes & Hughes | | Oil Operator | Jul 1984 |
| 1415 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 1416 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 1417 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 1418 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 1419 | Mid-Con Gas Corp | Yukon, OK 73099 | Oil & Gas Operator | Feb 2014 |
| 1420 | Mid-Con Petroleum Co Inc | Heath, OH 43056 | Oil & Gas Operator | Dec 2010 |
| 1421 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 1422 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Dec 2023 |
| 1423 | Mid-Continent Energy Operating | | Gas Operator | Aug 2007 |
| 1424 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 1425 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 1426 | Mid-Continent Petroleum Corp | | Oil & Gas Operator | Mar 2017 |
| 1427 | Mid-Continent Petroleum Management Inc | Cement, OK 73017-0600 | Oil & Gas Operator | Jan 2024 |
| 1428 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 1429 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | Apr 2024 |
| 1430 | Mid-Eastern Oil & Gas Co. | Burton, WV 26562-0000 | Oil & Gas Operator | Dec 2021 |
| 1431 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 1432 | Mid-National Resources Inc. | | Oil Operator | Feb 1999 |
| 1433 | Mid-Penn Energy Corporation | Harrisburg, PA 17101-1002 | Gas Operator | Dec 2021 |
| 1434 | Mid-South Trading, Inc. | | Oil & Gas Operator | Jan 2024 |
| 1435 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 1436 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 1437 | Mid-Tex Operating, Inc. | Austin, TX 78748 | Oil & Gas Operator | Apr 2024 |
| 1438 | Mid-Tex Resources | Merkel, TX 79536 | Oil & Gas Operator | Feb 2001 |
| 1439 | Mid-Way Environmental Services Inc | Stroud, OK 74079-0579 | Oil Operator | Feb 2022 |
| 1440 | Midas Resources, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 2024 |
| 1441 | Midco Energy, Inc. | | Oil & Gas Operator | Dec 1992 |
| 1442 | Midco Exploration, Inc. | Westmont, IL 60559 | Oil & Gas Operator | Dec 2023 |
| 1443 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 1444 | Midcoast Resources Co | Tulsa, OK 74136 | Oil & Gas Operator | Dec 1992 |
| 1445 | Midcon Offshore, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 1446 | Midcontinent Acquisition Properties, Inc. | Oklahoma City, OK 73102 | Gas Operator | Jan 2000 |
| 1447 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 1448 | Middaugh, Constance Y. | Scio, NY 14880 | Gas Operator | Dec 2022 |
| 1449 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 1450 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 1451 | Middle Fork Energy Uinta, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 1452 | Middleton Oil Company | Houston, TX 77006 | Oil & Gas Operator | Apr 2024 |
| 1453 | Mideast Gas Systems, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2005 |
| 1454 | Midenergy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 1455 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 1456 | Midkiff, John | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 1457 | Midla, LTD. | | Oil & Gas Operator | Jun 1990 |
| 1458 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 1459 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 1460 | Midland Oil Co | Brownsville, OH 43721 | Oil & Gas Operator | Dec 2000 |
| 1461 | Midland Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2023 |
| 1462 | Midland Res. Oper. Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1998 |
| 1463 | Midland Southwest Cold Lake Inc | Midland, TX 79702 | Oil & Gas Operator | Jun 1997 |
| 1464 | Midland TMG Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 1465 | Midland Workover, Inc. | | Oil & Gas Operator | Jan 2024 |
| 1466 | Midnight Drilling LLC | | Oil & Gas Operator | Jan 2016 |
| 1467 | Midnight Hour LLC | Enid, OK 73702 | Oil & Gas Operator | Apr 2020 |
| 1468 | Midnight Well Se | | Oil Operator | Sep 1994 |
| 1469 | Midnite Oil Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2024 |
| 1470 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 1471 | Midroc Oil Company Et Al | | Oil Operator | Nov 1984 |
| 1472 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. | | Oil & Gas Operator | Feb 2010 |
| 1473 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. & Placid Oil Co. | | Oil & Gas Operator | May 1991 |
| 1474 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 1475 | Midsco | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2024 |
| 1476 | Midstate Employment Services LLC | | Oil Operator | Feb 2024 |
| 1477 | Midstate Energy Inc | | Oil & Gas Operator | Aug 2017 |
| 1478 | Midstate Oil & Gas Company | Shawnee, OK 74802-1807 | Oil & Gas Operator | Dec 2023 |
| 1479 | Midstates Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 1480 | Midstates Energy Operating, LLC | FT Myers, FL 33912 | Oil Operator | Dec 2023 |
| 1481 | Midstates Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2000 |
| 1482 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 1483 | Midstates Petroleum Corp. | | Oil & Gas Operator | Dec 2008 |
| 1484 | Midville Energy, LLC. | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 1485 | Midway City Gas Company | Huntington, WV 25701 | Oil & Gas Operator | Dec 2018 |
| 1486 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 1487 | Midway Drilling Co. | Richmond, TX 77469 | Oil & Gas Operator | Apr 2024 |
| 1488 | Midway Energy, LLC | Thermopolis, WY 82443 | Oil Operator | Jan 2024 |
| 1489 | Midway Leasing Inc | Haskell, OK 74436-2406 | Oil & Gas Operator | Oct 2023 |
| 1490 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 1491 | Midway Operating Company, L.L.C. | Woodward, OK 73802 | Oil & Gas Operator | Apr 2024 |
| 1492 | Midway Production Co. | | Gas Operator | May 1990 |
| 1493 | Midway Terrel Operating Co | | Oil & Gas Operator | Dec 1999 |
| 1494 | Midway-Sunset Investors LLC | | Oil & Gas Operator | Dec 2023 |
| 1495 | Midwest Energy Companies, Inc. | | Oil & Gas Operator | Feb 1998 |
| 1496 | Midwest Energy Corporation | Tulsa, OK 74105-6083 | Oil & Gas Operator | Aug 2016 |
| 1497 | Midwest Enterprises, Inc. | Cashion, OK 73016-9626 | Oil & Gas Operator | Jan 2024 |
| 1498 | Midwest Eor Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | May 2013 |
| 1499 | Midwest Exploration Inc | Villa Park, IL 60181 | Oil & Gas Operator | Dec 1990 |
| 1500 | Midwest Oil & Gas | Columbus, OH 43220-1836-1836 | Oil & Gas Operator | Dec 2021 |