| 6801 | Maran Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2020 |
| 6802 | Maran Oil Company, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2022 |
| 6803 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 6804 | Maranatha Oil Company | Gonzales, TX 78629 | Oil & Gas Operator | Dec 2025 |
| 6805 | Marata Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 6806 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 6807 | Marathon Oil Ef LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 6808 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 6809 | Marchman, J. E. | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 6810 | Marco Polo Exploration, Inc. | Rosenberg, TX 77471 | Oil & Gas Operator | Dec 1993 |
| 6811 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 6812 | Marconi Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 6813 | Marcum Drilling Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 6814 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2025 |
| 6815 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 6816 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 6817 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 6818 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Dec 2025 |
| 6819 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 6820 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 6821 | Marion County Prod. Co., L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 6822 | Maritech Resources, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2009 |
| 6823 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 6824 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 6825 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Aug 2025 |
| 6826 | Mark I Oil Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 6827 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |
| 6828 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Sep 2025 |
| 6829 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 6830 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 6831 | Market Street Energy, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Dec 2025 |
| 6832 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 6833 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2025 |
| 6834 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 6835 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 6836 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 6837 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2025 |
| 6838 | Marquee Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 6839 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 6840 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 6841 | Marrow, N. S. | Austin, TX 78703 | Oil & Gas Operator | Aug 2012 |
| 6842 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Jun 2025 |
| 6843 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 6844 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 6845 | Marshall Petroleum, Inc. | Houston, TX 77040 | Oil & Gas Operator | Aug 2003 |
| 6846 | Marshall Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 6847 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 6848 | Marshall, A. B. | Houston, TX 77050 | Oil & Gas Operator | Sep 1995 |
| 6849 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 6850 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Dec 2025 |
| 6851 | Marshco Production LLC | Colorado City, TX 79512 | Oil Operator | Dec 2025 |
| 6852 | Marshfield Oil & Gas, LLC | Houston, TX 77070 | Oil & Gas Operator | Dec 2025 |
| 6853 | Martex Oil & Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Dec 2025 |
| 6854 | Martin & Richards Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 1995 |
| 6855 | Martin Bros. Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 1993 |
| 6856 | Martin Cannon Interests, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 6857 | Martin Foree Operating II, LLC | Royse City, TX 75189 | Oil & Gas Operator | Dec 2025 |
| 6858 | Martin Foree Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Dec 2025 |
| 6859 | Martin Gas Sales, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | May 1993 |
| 6860 | Martin Matrix Inc. | San Angelo, TX 76905 | Oil & Gas Operator | Dec 2025 |
| 6861 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Aug 2025 |
| 6862 | Martin Oil & Gas Inc. | Freer, TX 78357 | Oil & Gas Operator | Dec 2025 |
| 6863 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 6864 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 6865 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6866 | Martin Well Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2015 |
| 6867 | Martin Well Service Company | Mineral Wells, TX 76067 | Oil & Gas Operator | Jul 2006 |
| 6868 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2025 |
| 6869 | Martin, John I. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6870 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |
| 6871 | Martin, Tim | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2003 |
| 6872 | Martin, William C. | Houston, TX 77071 | Oil & Gas Operator | Dec 2025 |
| 6873 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 6874 | Martino, Joseph C. | Pasadena, TX 77504 | Oil & Gas Operator | Dec 2025 |
| 6875 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Dec 2025 |
| 6876 | Marwell Petroleum LTD Partnrship | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 6877 | Marwell Petroleum, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2006 |
| 6878 | Marymac Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2001 |
| 6879 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 6880 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Dec 2025 |
| 6881 | Masada Development Company | Lubbock, TX 79416 | Oil & Gas Operator | Nov 2021 |
| 6882 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Dec 2025 |
| 6883 | Masada Oil & Gas Company LTD. | Abilene, TX 79603 | Oil & Gas Operator | Dec 2025 |
| 6884 | Mascot Oil Company | Schulenburg, TX 78956 | Oil & Gas Operator | Dec 2025 |
| 6885 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6886 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6887 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6888 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 6889 | Masters Oil & Gas, LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2025 |
| 6890 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 6891 | Masters Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2008 |
| 6892 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 6893 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 6894 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 6895 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Oct 2024 |
| 6896 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 6897 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 6898 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Dec 2025 |
| 6899 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 6900 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Dec 2025 |