| 1501 | Mid States Gener | | Oil Operator | Apr 1988 |
| 1502 | Mid Texas Natural Gas | Kyle, TX 78640 | Oil & Gas Operator | May 2019 |
| 1503 | Mid Western Oil | | Oil Operator | Oct 1989 |
| 1504 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 1505 | Mid-America Resources Corporation | | Oil Operator | Jan 2019 |
| 1506 | Mid-America Resources, Inc. | | Oil & Gas Operator | Feb 2008 |
| 1507 | Mid-America/Hughes & Hughes | | Oil Operator | Jul 1984 |
| 1508 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 1509 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 1510 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 1511 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 1512 | Mid-Con Petroleum Co Inc | Heath, OH 43056 | Oil & Gas Operator | Dec 2010 |
| 1513 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 1514 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 1515 | Mid-Continent Energy Operating | | Gas Operator | Aug 2007 |
| 1516 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 1517 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 1518 | Mid-Continent Petroleum Management Inc | Cement, OK 73017 | Oil & Gas Operator | Nov 2025 |
| 1519 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 1520 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | Feb 2026 |
| 1521 | Mid-Eastern Oil & Gas Co. | Burton, WV 26562-0000 | Oil & Gas Operator | Dec 2021 |
| 1522 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 1523 | Mid-National Resources Inc. | | Oil Operator | Feb 1999 |
| 1524 | Mid-Penn Energy Corporation | Harrisburg, PA 17101-1002 | Gas Operator | Dec 2021 |
| 1525 | Mid-South Trading, Inc. | | Oil & Gas Operator | Jan 2025 |
| 1526 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1527 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 1528 | Mid-Tex Operating, Inc. | Austin, TX 78748 | Oil & Gas Operator | Feb 2026 |
| 1529 | Mid-Tex Resources | Merkel, TX 79536 | Oil & Gas Operator | Feb 2001 |
| 1530 | Mid-Way Environmental Services Inc | Stroud, OK 74079 | Oil Operator | Apr 2025 |
| 1531 | Midas Resources, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2026 |
| 1532 | Midco Energy, Inc. | | Oil & Gas Operator | Dec 1992 |
| 1533 | Midco Exploration, Inc. | Westmont, IL 60559 | Oil & Gas Operator | Sep 2025 |
| 1534 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1535 | Midcoast Resources Co | Tulsa, OK 74136 | Oil & Gas Operator | Dec 1992 |
| 1536 | Midcon Offshore, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 1537 | Midcontinent Acquisition Properties, Inc. | Oklahoma City, OK 73102 | Gas Operator | Jan 2000 |
| 1538 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 1539 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 1540 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 1541 | Middleton Oil Company | Houston, TX 77006 | Oil & Gas Operator | Feb 2026 |
| 1542 | Mideast Gas Systems, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2005 |
| 1543 | Midenergy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 1544 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 1545 | Midkiff, John | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 1546 | Midla, LTD. | | Oil & Gas Operator | Jun 1990 |
| 1547 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1548 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 1549 | Midland Oil Co | Brownsville, OH 43721 | Oil & Gas Operator | Dec 2000 |
| 1550 | Midland Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 1551 | Midland Res. Oper. Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1998 |
| 1552 | Midland Southwest Cold Lake Inc | Midland, TX 79702 | Oil & Gas Operator | Jun 1997 |
| 1553 | Midland TMG Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 1554 | Midland Workover, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1555 | Midlands Gas Cor | | Gas Operator | Dec 1996 |
| 1556 | Midnight Drilling LLC | | Oil & Gas Operator | Jan 2016 |
| 1557 | Midnight Energy Operating LLC | Drumright, OK 74030 | Oil Operator | Nov 2025 |
| 1558 | Midnight Hour LLC | Enid, OK 73702 | Oil & Gas Operator | Apr 2020 |
| 1559 | Midnight Well Se | | Oil Operator | Sep 1994 |
| 1560 | Midnite Oil Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Feb 2026 |
| 1561 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 1562 | Midroc Oil Company Et Al | | Oil Operator | Nov 1984 |
| 1563 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. | | Oil & Gas Operator | Feb 2010 |
| 1564 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. & Placid Oil Co. | | Oil & Gas Operator | May 1991 |
| 1565 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 1566 | Midsco | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 1567 | Midstate Employment Services LLC | | Oil Operator | Apr 2024 |
| 1568 | Midstate Energy Inc | | Oil & Gas Operator | Aug 2017 |
| 1569 | Midstate Oil & Gas Company | Shawnee, OK 74801 | Oil & Gas Operator | Nov 2025 |
| 1570 | Midstates Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 1571 | Midstates Energy Operating, LLC | FT Myers, FL 33912 | Oil Operator | Sep 2025 |
| 1572 | Midstates Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2000 |
| 1573 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 1574 | Midstates Petroleum Corp. | | Oil & Gas Operator | Dec 2008 |
| 1575 | Midville Energy, LLC. | Midland, TX 79705 | Oil & Gas Operator | Jul 2024 |
| 1576 | Midway City Gas Company | Huntington, WV 25701 | Oil & Gas Operator | Dec 2018 |
| 1577 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 1578 | Midway Drilling Co. | Richmond, TX 77469 | Oil & Gas Operator | Feb 2026 |
| 1579 | Midway Energy Partners Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 1580 | Midway Energy, LLC | Thermopolis, WY 82443 | Oil Operator | Nov 2025 |
| 1581 | Midway Leasing Inc | Haskell, OK 74436-2406 | Oil & Gas Operator | Jan 2024 |
| 1582 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 1583 | Midway Operating Company, L.L.C. | Woodward, OK 73802 | Oil & Gas Operator | Feb 2026 |
| 1584 | Midway Production Co. | | Gas Operator | May 1990 |
| 1585 | Midway Terrel Operating Co | | Oil & Gas Operator | Dec 1999 |
| 1586 | Midway Testing Company Inc | | Gas Operator | Mar 1984 |
| 1587 | Midway-Sunset Investors LLC | | Oil & Gas Operator | Dec 2025 |
| 1588 | Midwest Energy Companies, Inc. | | Oil & Gas Operator | Feb 1998 |
| 1589 | Midwest Energy Corporation | Tulsa, OK 74105-6083 | Oil & Gas Operator | Aug 2016 |
| 1590 | Midwest Enterprises Inc | Cashion, OK 73016-9626 | Oil & Gas Operator | Apr 2025 |
| 1591 | Midwest Enterprises, LLC | Cashion, OK 73016 | Oil Operator | Nov 2025 |
| 1592 | Midwest Eor Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | May 2013 |
| 1593 | Midwest Exploration Inc | Villa Park, IL 60181 | Oil & Gas Operator | Dec 1990 |
| 1594 | Midwest Oil & Gas | Columbus, OH 43220-1836 | Oil & Gas Operator | Dec 2021 |
| 1595 | Midwest Oil Company | Beggs, OK 74421-2976 | Oil Operator | Apr 2015 |
| 1596 | Midwest Oil, LLC | Destin, FL 32541 | Oil Operator | Sep 2025 |
| 1597 | Midwest Operating Company Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | Nov 1999 |
| 1598 | Midwest Operating, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2026 |
| 1599 | Midwest Pipe & Supply Company | Oklahoma City, OK 73154-0245 | Oil & Gas Operator | Dec 2008 |
| 1600 | Midwest Radiant Oil & Gas Co | | Oil Operator | Dec 2020 |