| 18501 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 18502 | Maguire James Q Inc | Norman, OK 73070-1748 | Oil & Gas Operator | Jun 2011 |
| 18503 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 18504 | Maha Energy Us Inc | | Oil Operator | Nov 2023 |
| 18505 | Mahan, Janet L | | Oil & Gas Operator | Nov 2025 |
| 18506 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 18507 | Mahl, Matthew J. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 18508 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 18509 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 18510 | Mahoney Drilling | | Gas Operator | Jan 1982 |
| 18511 | Mahue Construction Company | Huntington, WV 25724-2345 | Oil & Gas Operator | Dec 2021 |
| 18512 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 18513 | Mai Operations | | Oil Operator | Dec 1996 |
| 18514 | Maier Resources Inc | Oklahoma City, OK 73157-2996 | Oil & Gas Operator | Mar 2015 |
| 18515 | Maier, H Paul | | Oil Operator | Dec 2023 |
| 18516 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 18517 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 18518 | Maines, Wendy R. | Irving, NY 14081 | Gas Operator | Dec 2024 |
| 18519 | Mainspring LLC | Uhrichsville, OH 44683 | Oil & Gas Operator | Dec 2024 |
| 18520 | Maintainer Energy Res Corp Inc | Morris, OK 74445-2663 | Oil Operator | Oct 2025 |
| 18521 | Majestic Energy Company LLC | Keifer, OK 74041 | Oil Operator | Nov 2025 |
| 18522 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 18523 | Majestic Management Corp | | Oil Operator | Dec 2013 |
| 18524 | Majestic Oil & Gas Holding Co. | Midland, TX 79705 | Oil Operator | Feb 2026 |
| 18525 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 18526 | Majestic Petroleum Corporation | Dallas, TX 75230 | Oil & Gas Operator | Oct 1996 |
| 18527 | Majestic Petroleum Operations Inc | Story, WY 82842 | Gas Operator | Mar 2007 |
| 18528 | Majestic Resources, Inc. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Nov 2007 |
| 18529 | Major Oil Co LLC | Drumright, OK 74030 | Oil & Gas Operator | May 2025 |
| 18530 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 18531 | Majors Eugene E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Nov 2025 |
| 18532 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Aug 2025 |
| 18533 | Majors Jimmy R | Osceola, NE 68651-0726 | Oil & Gas Operator | Sep 2000 |
| 18534 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Nov 2025 |
| 18535 | Majors Michael | Holdenville, OK 74848-0531 | Oil & Gas Operator | Sep 1994 |
| 18536 | Majors, Linda K | | Oil Operator | Aug 2025 |
| 18537 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 18538 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 18539 | Mak-J Energy Wyoming LLC | Denver, CO 80620 | Oil & Gas Operator | Nov 2012 |
| 18540 | Makar Production Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 18541 | Makk Oil Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 18542 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 18543 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 18544 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 18545 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 18546 | Malka Production Company | Oklahoma City, OK 73101-0248 | Oil & Gas Operator | Jan 2000 |
| 18547 | Mallard Drilling Corp. | | Oil & Gas Operator | Jan 1993 |
| 18548 | Mallard DRLG & Central Oil Co | | Gas Operator | Mar 1978 |
| 18549 | Mallard Exploration, Inc. | | Oil & Gas Operator | Sep 1975 |
| 18550 | Mallard Oil & Gas | Cody, WY 82414-9640 | Oil & Gas Operator | Oct 2019 |
| 18551 | Mallard Operating LLC | | Oil & Gas Operator | Nov 2024 |
| 18552 | Mallard Petroleum, Inc. | | Oil & Gas Operator | Apr 1986 |
| 18553 | Mallett Luke-Dba Mallett Energy | New Concord, OH 43762 | Oil & Gas Operator | Dec 2016 |
| 18554 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 18555 | Mallonee-Mahoney | | Oil & Gas Operator | Dec 1994 |
| 18556 | Mallorn Energy LLC | Edmond, OK 73034 | Oil & Gas Operator | Nov 2025 |
| 18557 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 18558 | Malmac | | Gas Operator | Mar 1991 |
| 18559 | Malmac Energy Corp. | | Oil & Gas Operator | Jul 1987 |
| 18560 | Malone Donald J | | Oil Operator | Nov 1993 |
| 18561 | Malone Oil & Gas Exploration, Inc. | | Oil Operator | Dec 2018 |
| 18562 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 18563 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 18564 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Feb 2026 |
| 18565 | Malone-Killen Oil Expl. Co. | | Oil Operator | Apr 1992 |
| 18566 | Maloney Helen V Dba Penn-Ok Corporation | Hockessin, DE 19707-9640 | Oil & Gas Operator | Sep 2025 |
| 18567 | Malpais Inc | Prague, OK 74864 | Gas Operator | Nov 2025 |
| 18568 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 18569 | Malvern Group Inc | Clearwater, FL 33758-6817 | Oil & Gas Operator | Mar 2005 |
| 18570 | Maly & Maly Oil | Beggs, OK 74421-2844 | Oil & Gas Operator | Nov 2025 |
| 18571 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Feb 2026 |
| 18572 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 18573 | Mammoth Operating LLC | Spicewood, TX 78669 | Oil Operator | Feb 2026 |
| 18574 | Mammoth Resource, LLC | | Oil & Gas Operator | Dec 2008 |
| 18575 | Mammoth Service Group, LLC | | Oil & Gas Operator | Nov 2025 |
| 18576 | Manana Gas Inc | Albuquerque, NM 87122 | Oil & Gas Operator | Dec 2025 |
| 18577 | Mancal Resources Corporation | | Oil & Gas Operator | Aug 2019 |
| 18578 | Mance, Patricia M. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 18579 | Manchester Oil Co | | Oil Operator | Jan 2000 |
| 18580 | Mancuso, Richard L. | Le Roy, NY 14482 | Gas Operator | Dec 2024 |
| 18581 | Mandalay Oil & Gas, L.L.C. | | Oil & Gas Operator | May 2008 |
| 18582 | Mandalay Trading Services Inc. | | Oil Operator | Jul 1999 |
| 18583 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Feb 2026 |
| 18584 | Mandina & Murphy Oil Company | | Oil Operator | Nov 1990 |
| 18585 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 18586 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | Feb 2026 |
| 18587 | Manewal Bradley Oil Company | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2013 |
| 18588 | Maney McNeal Oil & Gas | | Oil & Gas Operator | Dec 1999 |
| 18589 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 18590 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2025 |
| 18591 | Manitou Explor Co Inc | Granville, OH 43023 | Oil & Gas Operator | Dec 1997 |
| 18592 | Manley Energy Resources LLC | | Oil Operator | Jan 2018 |
| 18593 | Manley, John D. III, Oper., Inc | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2016 |
| 18594 | Mann Energy, Inc. | Charleston, WV 25332-3242 | Oil & Gas Operator | Nov 2018 |
| 18595 | Mann Oil Company, LLC | | Oil Operator | Jun 2023 |
| 18596 | Mann Production Co., Inc. | | Oil Operator | Nov 1995 |
| 18597 | Manna Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Dec 2014 |
| 18598 | Manna Minerals, Inc. | | Oil & Gas Operator | Apr 1989 |
| 18599 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 18600 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |