| 6601 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 6602 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 6603 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Nov 2024 |
| 6604 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2024 |
| 6605 | Magnys Operations, LLC | El Paso, TX 79932 | Oil Operator | Sep 2024 |
| 6606 | Magruder '81, LTD. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 6607 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 6608 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 6609 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 6610 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 6611 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 6612 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jul 2024 |
| 6613 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 6614 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 6615 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 6616 | Majestic Petroleum Corporation | Dallas, TX 75230 | Oil & Gas Operator | Oct 1996 |
| 6617 | Majestic Petroleum Services LLC | Midland, TX 79705 | Oil Operator | Nov 2024 |
| 6618 | Majestic Resources, Inc. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Nov 2007 |
| 6619 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 6620 | Makar Production Company | Amarillo, TX 79118 | Oil & Gas Operator | Nov 2024 |
| 6621 | Makk Oil Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Nov 2024 |
| 6622 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Nov 2024 |
| 6623 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 6624 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 6625 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 6626 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 6627 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Nov 2024 |
| 6628 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 6629 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Nov 2024 |
| 6630 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 6631 | Mammoth Operating LLC | Spicewood, TX 78669 | Oil Operator | Nov 2024 |
| 6632 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Nov 2024 |
| 6633 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 6634 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | Nov 2024 |
| 6635 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 6636 | Manley, John D. III, Oper., Inc | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2016 |
| 6637 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 6638 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 6639 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Nov 2024 |
| 6640 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2024 |
| 6641 | Mantle Oil & Gas, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Nov 2024 |
| 6642 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Aug 2024 |
| 6643 | Manzanita Corporation | Midland, TX 79710 | Oil & Gas Operator | Nov 2008 |
| 6644 | Manzanita Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 6645 | Manzano LLC | Roswell, NM 88202 | Oil & Gas Operator | Nov 2024 |
| 6646 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 6647 | Manziel Interests | Tyler, TX 75711 | Oil & Gas Operator | Jun 2004 |
| 6648 | Manziel Management Corporation | Tyler, TX 75711 | Oil Operator | Feb 2014 |
| 6649 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 6650 | Maple Energy Holdings, LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2023 |
| 6651 | Mar Oil & Gas Corp. | Santa Fe, NM 87502 | Oil & Gas Operator | Sep 2024 |
| 6652 | Mar-Bec Energy Company, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | May 2001 |
| 6653 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 6654 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6655 | Maran Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2020 |
| 6656 | Maran Oil Company, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2022 |
| 6657 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 6658 | Maranatha Oil Company | Gonzales, TX 78629 | Oil & Gas Operator | Nov 2024 |
| 6659 | Marata Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 6660 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 6661 | Marathon Oil Ef LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2024 |
| 6662 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 6663 | Marchman, J. E. | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 6664 | Marco Polo Exploration, Inc. | Rosenberg, TX 77471 | Oil & Gas Operator | Dec 1993 |
| 6665 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 6666 | Marcum Drilling Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 6667 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Nov 2024 |
| 6668 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 6669 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 6670 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 6671 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Nov 2024 |
| 6672 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 6673 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Nov 2024 |
| 6674 | Marion County Prod. Co., L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 6675 | Maritech Resources, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2009 |
| 6676 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 6677 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 6678 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Aug 2024 |
| 6679 | Mark I Oil Company | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 6680 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |
| 6681 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Sep 2024 |
| 6682 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | May 2024 |
| 6683 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 6684 | Market Street Energy, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Nov 2024 |
| 6685 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 6686 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2024 |
| 6687 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jul 2024 |
| 6688 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 6689 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 6690 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Nov 2024 |
| 6691 | Marquee Corporation | Houston, TX 77024 | Oil & Gas Operator | Nov 2024 |
| 6692 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 6693 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 6694 | Marrow, N. S. | Austin, TX 78703 | Oil & Gas Operator | Aug 2012 |
| 6695 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Jul 2024 |
| 6696 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2024 |
| 6697 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 6698 | Marshall Petroleum, Inc. | Houston, TX 77040 | Oil & Gas Operator | Aug 2003 |
| 6699 | Marshall Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 6700 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |