| 6901 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 6902 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 6903 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 6904 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Feb 2026 |
| 6905 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 6906 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Feb 2026 |
| 6907 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 6908 | Mammoth Operating LLC | Spicewood, TX 78669 | Oil Operator | Feb 2026 |
| 6909 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Feb 2026 |
| 6910 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 6911 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | Feb 2026 |
| 6912 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 6913 | Manley, John D. III, Oper., Inc | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2016 |
| 6914 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 6915 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 6916 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Feb 2026 |
| 6917 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 6918 | Mantle Oil & Gas, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Feb 2026 |
| 6919 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 6920 | Manzanita Corporation | Midland, TX 79710 | Oil & Gas Operator | Nov 2008 |
| 6921 | Manzanita Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 6922 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 6923 | Manzano, LLC | Roswell, NM 88202 | Oil & Gas Operator | Feb 2026 |
| 6924 | Manziel Interests | Tyler, TX 75711 | Oil & Gas Operator | Jun 2004 |
| 6925 | Manziel Management Corporation | Tyler, TX 75711 | Oil Operator | Feb 2014 |
| 6926 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 6927 | Maple Energy Holdings, LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2023 |
| 6928 | Mar-Bec Energy Company, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | May 2001 |
| 6929 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 6930 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6931 | Maran Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2020 |
| 6932 | Maran Oil Company, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2022 |
| 6933 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 6934 | Maranatha Oil Company | Gonzales, TX 78629 | Oil & Gas Operator | Feb 2026 |
| 6935 | Marata Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 6936 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 6937 | Marathon Oil Ef LLC | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 6938 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 6939 | Marchman, J. E. | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 6940 | Marco Polo Exploration, Inc. | Rosenberg, TX 77471 | Oil & Gas Operator | Dec 1993 |
| 6941 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 6942 | Marconi Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 6943 | Marcum Drilling Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 6944 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Sep 2025 |
| 6945 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 6946 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 6947 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 6948 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Feb 2026 |
| 6949 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 6950 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Feb 2026 |
| 6951 | Marion County Prod. Co., L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 6952 | Maritech Resources, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2009 |
| 6953 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 6954 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 6955 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Nov 2025 |
| 6956 | Mark I Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 6957 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |
| 6958 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Dec 2025 |
| 6959 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 6960 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 6961 | Market Street Energy, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Feb 2026 |
| 6962 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 6963 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Feb 2026 |
| 6964 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 6965 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 6966 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 6967 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2025 |
| 6968 | Marquee Corporation | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 6969 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 6970 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 6971 | Marrow, N. S. | Austin, TX 78703 | Oil & Gas Operator | Aug 2012 |
| 6972 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Sep 2025 |
| 6973 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 6974 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 6975 | Marshall Petroleum, Inc. | Houston, TX 77040 | Oil & Gas Operator | Aug 2003 |
| 6976 | Marshall Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 6977 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 6978 | Marshall, A. B. | Houston, TX 77050 | Oil & Gas Operator | Sep 1995 |
| 6979 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 6980 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 6981 | Marshco Production LLC | Colorado City, TX 79512 | Oil Operator | Feb 2026 |
| 6982 | Marshfield Oil & Gas, LLC | Houston, TX 77070 | Oil & Gas Operator | Feb 2026 |
| 6983 | Martex Oil & Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Feb 2026 |
| 6984 | Martin & Richards Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 1995 |
| 6985 | Martin Bros. Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 1993 |
| 6986 | Martin Cannon Interests, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 6987 | Martin Foree Operating II, LLC | Fate, TX 75132 | Oil & Gas Operator | Feb 2026 |
| 6988 | Martin Foree Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Feb 2026 |
| 6989 | Martin Gas Sales, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | May 1993 |
| 6990 | Martin Matrix Inc. | San Angelo, TX 76905 | Oil & Gas Operator | Feb 2026 |
| 6991 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Oct 2025 |
| 6992 | Martin Oil & Gas Inc. | Freer, TX 78357 | Oil & Gas Operator | Feb 2026 |
| 6993 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 6994 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 6995 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 6996 | Martin Well Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2015 |
| 6997 | Martin Well Service Company | Mineral Wells, TX 76067 | Oil & Gas Operator | Jul 2006 |
| 6998 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2026 |
| 6999 | Martin, John I. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 7000 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |