| 17501 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 17502 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 17503 | Mahue Construction Company | Huntington, WV 25724-2345 | Oil & Gas Operator | Dec 2021 |
| 17504 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 17505 | Mai Operations | | Oil Operator | Dec 1996 |
| 17506 | Maier Resources Inc | Oklahoma City, OK 73157-2996 | Oil & Gas Operator | Mar 2015 |
| 17507 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 17508 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 17509 | Maines, Wendy R. | Irving, NY 14081 | Gas Operator | Dec 2024 |
| 17510 | Mainspring LLC | Uhrichsville, OH 44683 | Oil & Gas Operator | Dec 2024 |
| 17511 | Maintainer Energy Res Corp Inc | Morris, OK 74445-2663 | Oil Operator | Jan 2026 |
| 17512 | Majestic Energy Company LLC | Keifer, OK 74041 | Oil Operator | Feb 2026 |
| 17513 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 17514 | Majestic Management Corp | | Oil Operator | Dec 2013 |
| 17515 | Majestic Oil & Gas Holding Co. | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 17516 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 17517 | Majestic Petroleum Corporation | Dallas, TX 75230 | Oil & Gas Operator | Oct 1996 |
| 17518 | Majestic Petroleum Operations Inc | Story, WY 82842 | Gas Operator | Mar 2007 |
| 17519 | Majestic Resources, Inc. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Nov 2007 |
| 17520 | Majoil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1996 |
| 17521 | Major Oil Co LLC | Drumright, OK 74030 | Oil & Gas Operator | May 2025 |
| 17522 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 17523 | Majors Eugene E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Feb 2026 |
| 17524 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Dec 2025 |
| 17525 | Majors Jimmy R | Osceola, NE 68651-0726 | Oil & Gas Operator | Sep 2000 |
| 17526 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Feb 2026 |
| 17527 | Majors Michael | Holdenville, OK 74848-0531 | Oil & Gas Operator | Sep 1994 |
| 17528 | Majors, Linda K | | Oil Operator | Aug 2025 |
| 17529 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 17530 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 17531 | Mak-J Energy Wyoming LLC | Denver, CO 80620 | Oil & Gas Operator | Nov 2012 |
| 17532 | Makar Production Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 17533 | Makk Oil Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 17534 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2026 |
| 17535 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 17536 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 17537 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 17538 | Mallard Drilling Corp. | | Oil & Gas Operator | Jan 1993 |
| 17539 | Mallard Exploration, Inc. | | Oil & Gas Operator | Sep 1975 |
| 17540 | Mallard Oil & Gas | Cody, WY 82414-9640 | Oil & Gas Operator | Oct 2019 |
| 17541 | Mallard Operating LLC | | Oil & Gas Operator | Nov 2024 |
| 17542 | Mallard Petroleum, Inc. | | Oil & Gas Operator | Apr 1986 |
| 17543 | Mallett Luke-Dba Mallett Energy | New Concord, OH 43762 | Oil & Gas Operator | Dec 2016 |
| 17544 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 17545 | Mallorn Energy LLC | Edmond, OK 73034 | Oil & Gas Operator | Feb 2026 |
| 17546 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 17547 | Malmac Energy Corp. | | Oil & Gas Operator | Jul 1987 |
| 17548 | Malone Donald J | | Oil Operator | Nov 1993 |
| 17549 | Malone Oil & Gas Exploration, Inc. | | Oil Operator | Dec 2018 |
| 17550 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 17551 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 17552 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Jun 2026 |
| 17553 | Malone-Killen Oil Expl. Co. | | Oil Operator | Apr 1992 |
| 17554 | Maloney Helen V Dba Penn-Ok Corporation | Hockessin, DE 19707-9640 | Oil & Gas Operator | Feb 2026 |
| 17555 | Malpais Inc | Prague, OK 74864 | Gas Operator | Feb 2026 |
| 17556 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 17557 | Malvern Group Inc | Clearwater, FL 33758-6817 | Oil & Gas Operator | Mar 2005 |
| 17558 | Maly & Maly Oil | Beggs, OK 74421-2844 | Oil & Gas Operator | Feb 2026 |
| 17559 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Jun 2026 |
| 17560 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 17561 | Mammoth Operating LLC | Spicewood, TX 78669 | Oil Operator | Jun 2026 |
| 17562 | Mammoth Service Group, LLC | | Oil & Gas Operator | Dec 2025 |
| 17563 | Manana Gas Inc | Albuquerque, NM 87122 | Oil & Gas Operator | Mar 2026 |
| 17564 | Mancal Resources Corporation | | Oil & Gas Operator | Aug 2019 |
| 17565 | Mance, Patricia M. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 17566 | Manchester Oil Co | | Oil Operator | Jan 2000 |
| 17567 | Mancuso, Richard L. | Le Roy, NY 14482 | Gas Operator | Dec 2024 |
| 17568 | Mandalay Oil & Gas, L.L.C. | | Oil & Gas Operator | May 2008 |
| 17569 | Mandalay Trading Services Inc. | | Oil Operator | Jul 1999 |
| 17570 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Jun 2026 |
| 17571 | Mandina & Murphy Oil Company | | Oil Operator | Nov 1990 |
| 17572 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 17573 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | Jun 2026 |
| 17574 | Manewal Bradley Oil Company | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2013 |
| 17575 | Maney McNeal Oil & Gas | | Oil & Gas Operator | Dec 1999 |
| 17576 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 17577 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Dec 2025 |
| 17578 | Manitou Explor Co Inc | Granville, OH 43023 | Oil & Gas Operator | Dec 1997 |
| 17579 | Manley Energy Resources LLC | | Oil Operator | Jan 2018 |
| 17580 | Manley, John D. III, Oper., Inc | Corpus Christ, TX 78404 | Oil & Gas Operator | Feb 2016 |
| 17581 | Mann Energy, Inc. | Charleston, WV 25332-3242 | Oil & Gas Operator | Nov 2018 |
| 17582 | Mann Oil Company, LLC | | Oil Operator | Jun 2023 |
| 17583 | Mann Production Co., Inc. | | Oil Operator | Nov 1995 |
| 17584 | Manna Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Dec 2014 |
| 17585 | Manna Minerals, Inc. | | Oil & Gas Operator | Apr 1989 |
| 17586 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 17587 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 17588 | Mannon L. Walters, Inc. | | Oil & Gas Operator | Jun 2024 |
| 17589 | Manns' Atp, Inc. | Potwin, KS 67123 | Oil Operator | Oct 2025 |
| 17590 | Manolo Energy, Inc. | | Oil Operator | Sep 1996 |
| 17591 | Manorado Oil Company | | Oil Operator | Feb 1999 |
| 17592 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 17593 | Mantex Inc | Tulsa, OK 74114-6234 | Oil & Gas Operator | Mar 2015 |
| 17594 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 17595 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Jun 2026 |
| 17596 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2026 |
| 17597 | Mantle Oil & Gas, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Jun 2026 |
| 17598 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 17599 | Manursing Island Prod. Corp. | | Oil & Gas Operator | Sep 2002 |
| 17600 | Manx Inc | Pleasantville, PA 16341-1229 | Oil Operator | Dec 2020 |