| 1801 | Missing Moon Oil Inc | Knox, PA 16232-4507 | Oil & Gas Operator | Dec 2024 |
| 1802 | Mission Creek Opco, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 1803 | Mission Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1804 | Mission Exploration, Inc. | Fate, TX 75132 | Oil & Gas Operator | Dec 1987 |
| 1805 | Mission Leasing LTD | Tulsa, OK 74136 | Oil Operator | Dec 2000 |
| 1806 | Mission Oil & Gas | Pawhuska, OK 74056 | Oil Operator | May 2013 |
| 1807 | Mission Oil Company | | Oil & Gas Operator | Nov 2025 |
| 1808 | Mission Resources | | Oil & Gas Operator | Dec 1991 |
| 1809 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 1810 | Mission River Systems, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Feb 2026 |
| 1811 | Mississippi Resources, LLC Dba MSR Operating, LLC | | Oil & Gas Operator | May 2021 |
| 1812 | Mississippi River Transm. Corp | | Oil & Gas Operator | Sep 2002 |
| 1813 | Mississippi Valley Gas Co | | Oil & Gas Operator | Aug 1984 |
| 1814 | Mississippi Ventures | | Gas Operator | Feb 1992 |
| 1815 | Mississippi Ventures, Inc. | Granbury, TX 76048 | Gas Operator | Jul 1997 |
| 1816 | Missouri Basin Well Service, Inc. | Belfield, ND 58622 | Oil & Gas Operator | Jan 2018 |
| 1817 | Missouri Breaks, LLC | | Oil & Gas Operator | Jun 2011 |
| 1818 | Missouri River R | | Gas Operator | Jun 1993 |
| 1819 | Missouri River Resources ND, LLC | | Oil & Gas Operator | Dec 2025 |
| 1820 | Missouri River Royalty Corporation | Bismarck, ND 58504 | Oil & Gas Operator | Dec 2025 |
| 1821 | Mist Prod. & Exploration Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1822 | Mistex Operating, Inc. | Lewisville, TX 75029 | Oil & Gas Operator | Feb 2026 |
| 1823 | Mitch Well Energy Inc | Waterford, PA 16441-8143 | Oil & Gas Operator | Dec 2012 |
| 1824 | Mitchell And R. E. Mitchel | | Oil Operator | Feb 2000 |
| 1825 | Mitchell Cecil D | Haskell, OK 74436-7667 | Oil & Gas Operator | Apr 2020 |
| 1826 | Mitchell Drilling Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 1827 | Mitchell Ehrlich Oil & Gas, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 1828 | Mitchell Energy | | Oil & Gas Operator | Dec 1996 |
| 1829 | Mitchell Energy & Goodrich Oil | | Oil & Gas Operator | Feb 1985 |
| 1830 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 1831 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 1832 | Mitchell James D | Bartlesville, OK 74006-7610 | Oil Operator | Nov 2025 |
| 1833 | Mitchell M J | | Oil & Gas Operator | Jan 1983 |
| 1834 | Mitchell Martha | Henryetta, OK 74437-0488 | Oil & Gas Operator | Apr 2011 |
| 1835 | Mitchell Oil | | Oil Operator | Nov 2025 |
| 1836 | Mitchell Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 1837 | Mitchell Resources, Inc. | Addison, TX 75001 | Oil & Gas Operator | Aug 2003 |
| 1838 | Mitchell Wyatt B | | Oil Operator | Aug 1993 |
| 1839 | Mitchell, James - Operator | Lamesa, TX 79331 | Oil & Gas Operator | Mar 2008 |
| 1840 | Mitchell-Grossu Oil Co. | | Oil & Gas Operator | Sep 2023 |
| 1841 | Mitchwil Investments LLC | | Oil & Gas Operator | Dec 2019 |
| 1842 | Miti-Mini Inc | Wetumka, OK 74883-6172 | Gas Operator | Jul 2016 |
| 1843 | Mito Resources LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |
| 1844 | Mito Resources TX LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 1845 | Mitsui E&P USA LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 1846 | Miura Petroleum | | Oil Operator | Dec 1992 |
| 1847 | Miura Petroleum Inc | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 1848 | Miway Operations | Russell, KS 67665 | Oil Operator | Aug 1994 |
| 1849 | Mixon, Robert N. | Lometa, TX 76853 | Oil & Gas Operator | Feb 2026 |
| 1850 | Mize Energy Producers, LLC | | Oil & Gas Operator | Oct 2025 |
| 1851 | Mize Operations, LLC. | | Oil & Gas Operator | Dec 2018 |
| 1852 | MJ Energy Company, LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 1853 | MJ Energy LLC | Denver, CO 80206 | Oil Operator | Jan 2025 |
| 1854 | MJ Energy, LLC Of Arkansas | | Oil Operator | Jan 2025 |
| 1855 | MJ Goetz Bonding, LLC | Bartlesville, OK 74006 | Oil Operator | Nov 2025 |
| 1856 | MJ Oil, Inc. | Houston, TX 77265 | Oil & Gas Operator | Feb 2026 |
| 1857 | MJB Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 1858 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Feb 2026 |
| 1859 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 1860 | MJM Resources Inc | Norman, OK 73072 | Oil & Gas Operator | Dec 2025 |
| 1861 | MJT Oil | | Oil Operator | Sep 2025 |
| 1862 | MK Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2014 |
| 1863 | MK Operating Company LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Feb 2026 |
| 1864 | Mka Oil Properties | Midland, TX 79701 | Oil & Gas Operator | Sep 1997 |
| 1865 | Mke Producing Inc | Canton, OH 44735 | Oil & Gas Operator | Dec 2024 |
| 1866 | MKJ Oil Co LLC | Harper, KS 67058 | Oil & Gas Operator | Sep 2025 |
| 1867 | MKS Consulting Corporation | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2005 |
| 1868 | MKS Natural Gas Company | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2016 |
| 1869 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 1870 | MLB Operating Services, LLC | Tenn Colony, TX 75861 | Oil & Gas Operator | Feb 2026 |
| 1871 | MLB Properties Inc | Roaming Shores, OH 44085 | Oil & Gas Operator | Dec 2024 |
| 1872 | MLC Co., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 1996 |
| 1873 | MLC Operating, LP | Houston, TX 77063 | Oil & Gas Operator | Feb 2026 |
| 1874 | MLC Resources LLC | Kingfisher, OK 73750-0364 | Oil & Gas Operator | Nov 2025 |
| 1875 | MLF, Inc. | Houston, TX 77096 | Gas Operator | Nov 2009 |
| 1876 | MLGW | | Gas Operator | Sep 1984 |
| 1877 | MLT Energy, LLC | Derby, KS 67037 | Oil Operator | Nov 2025 |
| 1878 | MLX Operating, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2021 |
| 1879 | MM China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Feb 2026 |
| 1880 | MMD Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2000 |
| 1881 | MMG Oil Company | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2006 |
| 1882 | MMGL East Texas II, LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 1883 | MMGL East Texas III, LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 1884 | MMGL TXPH, LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 1885 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Dec 2025 |
| 1886 | Mo-Jon, Inc. | Edroy, TX 78352 | Oil & Gas Operator | May 1999 |
| 1887 | Mo-Kan Oil Group | St. Louis, MO 63131 | Oil Operator | Sep 2001 |
| 1888 | Mo-Ky | | Oil Operator | Dec 1982 |
| 1889 | Mo-Tech Energy I | | Gas Operator | Dec 1993 |
| 1890 | Moabb Oil Corp | | Oil & Gas Operator | Apr 1998 |
| 1891 | Mob Corp | Waynesburg, PA 15370-2036 | Gas Operator | Dec 2007 |
| 1892 | Mobay Storage Hub LLC | | Gas Operator | Oct 2008 |
| 1893 | Mobeetie Resource Dev LLC | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 1894 | Mobil E&P N.A.-Pel-Tex | | Oil & Gas Operator | Dec 1993 |
| 1895 | Mobil E&P N.A.-WM Scully Et Al | | Oil & Gas Operator | Dec 1993 |
| 1896 | Mobil E&P North America Inc. | | Oil & Gas Operator | Jan 1994 |
| 1897 | Mobil Exp & Prod Us Inc | Houston, TX 77060-1991 | Oil & Gas Operator | May 2001 |
| 1898 | Mobil Expl & Producing North America Inc | | Oil & Gas Operator | Nov 1986 |
| 1899 | Mobil Explor & Prod | Cortez, CO 81321 | Oil & Gas Operator | May 2001 |
| 1900 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |