| 1801 | Mitchell-Grossu Oil Co. | | Oil & Gas Operator | Sep 2023 |
| 1802 | Mitchwil Investments LLC | | Oil & Gas Operator | Dec 2019 |
| 1803 | Miti-Mini Inc | Wetumka, OK 74883-6172 | Gas Operator | Jul 2016 |
| 1804 | Mito Resources LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 1805 | Mito Resources TX LLC | Edmond, OK 73013 | Oil & Gas Operator | Apr 2025 |
| 1806 | Mitsui E&P USA LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 1807 | Miura Petroleum | | Oil Operator | Dec 1992 |
| 1808 | Miura Petroleum, Inc. | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 1809 | Miway Operations | Russell, KS 67665 | Oil Operator | Aug 1994 |
| 1810 | Mixon, Robert N. | Lometa, TX 76853 | Oil & Gas Operator | Apr 2025 |
| 1811 | Mize Energy Producers, LLC | | Oil & Gas Operator | Nov 2024 |
| 1812 | Mize Operations, LLC. | | Oil & Gas Operator | Dec 2018 |
| 1813 | MJ Energy Company, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 1814 | MJ Energy, LLC | Denver, CO 80206 | Oil Operator | Jan 2025 |
| 1815 | MJ Energy, LLC Of Arkansas | | Oil Operator | Jan 2025 |
| 1816 | MJ Goetz Bonding, LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2025 |
| 1817 | MJ Oil Company | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 1818 | MJ Oil, Inc. | Houston, TX 77265 | Oil & Gas Operator | Apr 2025 |
| 1819 | MJB Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2025 |
| 1820 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Apr 2025 |
| 1821 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 1822 | MJM Resources Inc | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 1823 | MJT Oil | | Oil Operator | Dec 2024 |
| 1824 | MK Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2014 |
| 1825 | MK Operating Company LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Apr 2025 |
| 1826 | Mka Oil Properties | Midland, TX 79701 | Oil & Gas Operator | Sep 1997 |
| 1827 | Mke Producing Inc | Canton, OH 44735 | Oil & Gas Operator | Dec 2023 |
| 1828 | MKG Marketing Co | Oklahoma City, OK 73102 | Gas Operator | Feb 2006 |
| 1829 | MKJ Oil Co LLC | Harper, KS 67058 | Oil & Gas Operator | Dec 2024 |
| 1830 | MKS Consulting Corporation | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2005 |
| 1831 | MKS Natural Gas Company | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2016 |
| 1832 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 1833 | MLB Operating Services, LLC | Tenn Colony, TX 75861 | Oil & Gas Operator | Apr 2025 |
| 1834 | MLC Co., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 1996 |
| 1835 | MLC Operating, LP | Houston, TX 77063 | Oil & Gas Operator | Apr 2025 |
| 1836 | MLC Resources LLC | Kingfisher, OK 73750-0364 | Oil & Gas Operator | Jan 2025 |
| 1837 | MLF, Inc. | Houston, TX 77096 | Gas Operator | Nov 2009 |
| 1838 | MLGW | | Gas Operator | Sep 1984 |
| 1839 | MLT Energy, LLC | Derby, KS 67037 | Oil Operator | Jan 2025 |
| 1840 | MLX Operating, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2021 |
| 1841 | MM China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Apr 2025 |
| 1842 | MMD Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2000 |
| 1843 | MMG Oil Company | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2006 |
| 1844 | MMGL East Texas II, LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 1845 | MMGL East Texas III, LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 1846 | MMGL TXPH, LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 1847 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Apr 2025 |
| 1848 | Mo-Jon, Inc. | Edroy, TX 78352 | Oil & Gas Operator | May 1999 |
| 1849 | Mo-Kan Oil Group | St. Louis, MO 63131 | Oil Operator | Sep 2001 |
| 1850 | Mo-Ky | | Oil Operator | Dec 1982 |
| 1851 | Moabb Oil Corp | | Oil & Gas Operator | Apr 1998 |
| 1852 | Mob Corp | Waynesburg, PA 15370-2036 | Gas Operator | Dec 2007 |
| 1853 | Mobay Storage Hub LLC | | Gas Operator | Oct 2008 |
| 1854 | Mobeetie Resource Dev LLC | Booker, TX 79005 | Oil & Gas Operator | Apr 2025 |
| 1855 | Mobil E&P N.A.-Pel-Tex | | Oil & Gas Operator | Dec 1993 |
| 1856 | Mobil E&P N.A.-WM Scully Et Al | | Oil & Gas Operator | Dec 1993 |
| 1857 | Mobil E&P North America Inc. | | Oil & Gas Operator | Jan 1994 |
| 1858 | Mobil Exp & Prod Us Inc | Houston, TX 77060-1991 | Oil & Gas Operator | May 2001 |
| 1859 | Mobil Expl & Producing North America Inc | | Oil & Gas Operator | Nov 1986 |
| 1860 | Mobil Explor & Prod | Cortez, CO 81321 | Oil & Gas Operator | May 2001 |
| 1861 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 1862 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 1863 | Mobil Oil E & P Southeast Inc | | Oil & Gas Operator | Sep 2013 |
| 1864 | Mobil Oil E&P Se Inc - Pel-Tex | | Oil & Gas Operator | Dec 2005 |
| 1865 | Mobil Oil Expl & Prod S E | | Oil & Gas Operator | Dec 1979 |
| 1866 | Mobil Oil Exploration & Producing Southeast, Inc. | | Oil & Gas Operator | Jan 2025 |
| 1867 | Mobil Oil Exploration & Production North America Inc. | | Oil & Gas Operator | Dec 1996 |
| 1868 | Mobil Petro Vac, Inc. | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 1869 | Mobil Producing Texas & New Mexico | Denver City, TX 79323 | Oil & Gas Operator | Jun 2005 |
| 1870 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 1871 | Mobile Gulf, Inc. | | Oil & Gas Operator | Aug 1985 |
| 1872 | Mobile Petrovac, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 1873 | Mobile Production Systems, Inc. | Austin, TX 78711 | Oil & Gas Operator | Feb 1995 |
| 1874 | Mobley & Davis | | Oil & Gas Operator | Oct 1986 |
| 1875 | Mobley & McCain | | Oil & Gas Operator | Nov 1979 |
| 1876 | Mobley & McCain, Et Al | | Oil & Gas Operator | Jul 1986 |
| 1877 | Mobley Oil Company, Inc. | | Oil & Gas Operator | Feb 1990 |
| 1878 | Mobley Valve Service, Inc. | | Oil & Gas Operator | Nov 2006 |
| 1879 | Mobpar, Inc. | Houston, TX 77219 | Oil & Gas Operator | Apr 2025 |
| 1880 | Mobreal Oil Inc | Wilmington, DE 19808 | Oil & Gas Operator | Dec 1989 |
| 1881 | Mockingbird Oil, Inc. (I) | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 1882 | Moco Oil Inc | | Oil Operator | May 1984 |
| 1883 | Moco Operating Company | | Oil & Gas Operator | Mar 2002 |
| 1884 | Mode Oil & Gasdev LTD12/21/Ofb 9-98 | | Oil & Gas Operator | May 2013 |
| 1885 | Modena Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 1886 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Apr 2025 |
| 1887 | Modus Inc. | | Oil & Gas Operator | Dec 2024 |
| 1888 | Moenning, Vernie | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 1889 | Moff Oil Company | Pratt, KS 67124 | Gas Operator | Apr 1988 |
| 1890 | Moffitt W G Trust | Fort Gibson, OK 74434-4258 | Gas Operator | Nov 2019 |
| 1891 | Mogo Reagan, LLC | Cut Bank, MT 59427 | Oil & Gas Operator | Jan 2025 |
| 1892 | Mogul Energy Corp | Los Angeles, CA 90024 | Oil & Gas Operator | Jan 2001 |
| 1893 | Mogul Energy International, Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 2017 |
| 1894 | Mogul Operating LLC | St Petersburg, FL 33706 | Oil Operator | Apr 2025 |
| 1895 | Mogul Resources, LLC | Ranger, TX 76470 | Oil & Gas Operator | Apr 2025 |
| 1896 | Mohawk Drilling Company | | Oil & Gas Operator | Nov 1998 |
| 1897 | Mohawk Operating LLC | Oklahoma City, OK 73173-8907 | Gas Operator | Feb 2004 |
| 1898 | Mohawk Petroleum | | Oil & Gas Operator | Jan 1995 |
| 1899 | Mohican Exploration, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2024 |
| 1900 | Mohican Oil & Gas, L.L.C. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Apr 2013 |