| 1801 | MARKHAM | Texas County, OK | Gas Property | Jan 2026 |
| 1802 | MARKHAM | Wheeler County, TX | Oil & Gas Property | Jan 2026 |
| 1803 | MARKHAM STATE COM | Chaves County, NM | Oil & Gas Property | Feb 2026 |
| 1804 | MARKHAM,C | Wilson County, KS | Gas Property | Dec 2025 |
| 1805 | MARKHAM-TUSSY | Stephens County, OK | Oil Property | Jan 2026 |
| 1806 | MARKLE | Westmoreland County, PA | Oil & Gas Property | Feb 2026 |
| 1807 | MARKLEY | Cowley County, KS | Oil Property | Dec 1985 |
| 1808 | MARKLEY | Sumner County, KS | Oil Property | Aug 1992 |
| 1809 | MARKLEY | Medina County, OH | Oil & Gas Property | Dec 2025 |
| 1810 | MARKLEY | Labette County, KS | Gas Property | Dec 2025 |
| 1811 | MARKLEY | Sumner County, KS | Oil Property | Dec 2025 |
| 1812 | MARKLEY | Elk County, KS | Oil Property | Nov 2025 |
| 1813 | MARKLEY | Wayne County, OH | Gas Property | Dec 2025 |
| 1814 | MARKLEY | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1815 | MARKLEY ELIZABETH | Tuscarawas County, OH | Oil & Gas Property | Dec 2022 |
| 1816 | MARKLEY FANNIE | Lipscomb County, TX | Oil & Gas Property | Dec 2025 |
| 1817 | MARKOVICH,JOHN FOUR STATES UNIT A | Marion County, WV | Gas Property | Dec 2021 |
| 1818 | MARKOVITCH | Susquehanna County, PA | Gas Property | Feb 2026 |
| 1819 | MARKS | Blaine County, OK | Oil & Gas Property | Jan 2026 |
| 1820 | MARKS | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1821 | MARKS | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1822 | MARKS | Goliad County, TX | Oil & Gas Property | Oct 2017 |
| 1823 | MARKS | Blaine County, OK | Oil & Gas Property | Jan 2026 |
| 1824 | MARKS 'A' | Morton County, KS | Gas Property | Dec 2025 |
| 1825 | MARKS POOVEY GAS UNIT 1 | Rusk County, TX | Oil & Gas Property | Jan 2026 |
| 1826 | MARKS, C | Roane County, WV | Oil & Gas Property | Dec 2021 |
| 1827 | MARKS, J | Lewis County, WV | Oil & Gas Property | Dec 2021 |
| 1828 | MARKS, JAMES J | Lewis County, WV | Gas Property | Dec 2021 |
| 1829 | MARKS, JERRY M | Gilmer County, WV | Oil & Gas Property | Dec 2021 |
| 1830 | MARKS, ORMEDA | Gilmer County, WV | Oil & Gas Property | Dec 2021 |
| 1831 | MARKS, P | Wirt County, WV | Oil & Gas Property | Dec 2021 |
| 1832 | MARKULIC, F | Allegan County, MI | Oil Property | Feb 2026 |
| 1833 | MARKUS | Kingfisher County, OK | Oil & Gas Property | Mar 2023 |
| 1834 | MARKWELL | Caddo County, OK | Oil Property | Sep 2008 |
| 1835 | MARKWITH, DENNIS | Ritchie County, WV | Oil & Gas Property | Dec 2021 |
| 1836 | MARLA | Richland County, MT | Oil & Gas Property | Feb 2026 |
| 1837 | MARLA 10 | Atascosa County, TX | Oil & Gas Property | Jan 2026 |
| 1838 | MARLAN DOWNEY | Lea County, NM | Oil & Gas Property | Feb 2026 |
| 1839 | MARLAND 41-14TFH | Mountrail County, ND | Oil & Gas Property | Feb 2026 |
| 1840 | MARLATT | Adams County, CO | Oil & Gas Property | Jun 2020 |
| 1841 | MARLATT | Major County, OK | Oil & Gas Property | Mar 2025 |
| 1842 | MARLATT | Coshocton County, OH | Oil & Gas Property | Dec 2007 |
| 1843 | MARLENE | Finney County, KS | Oil Property | Nov 2025 |
| 1844 | MARLENE | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1845 | MARLENE | Lane County, KS | Oil Property | Dec 2025 |
| 1846 | MARLENE 1 | Decatur County, KS | Oil Property | Dec 2025 |
| 1847 | MARLENE 1-10H | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1848 | MARLENE 34-11TFH | Dunn County, ND | Oil & Gas Property | Feb 2026 |
| 1849 | MARLENE 42X-20 | McKenzie County, ND | Oil & Gas Property | Feb 2026 |
| 1850 | MARLENE 5501 14-1T | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1851 | MARLENE LILI | Washington County, TX | Oil & Gas Property | Jan 2026 |
| 1852 | MARLENE OLSON | Live Oak County, TX | Oil & Gas Property | Jan 2026 |
| 1853 | MARLER | Wilson County, KS | Gas Property | Mar 2025 |
| 1854 | MARLETT T. W | Wise County, TX | Oil & Gas Property | Jan 2026 |
| 1855 | MARLEY | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 1856 | MARLEY | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1857 | MARLEY | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1858 | MARLEY C01 | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 1859 | MARLEY STATE COM 31 | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 1860 | MARLEY-FRANSSEN | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1861 | MARLIN | Dunn County, ND | Oil & Gas Property | Feb 2026 |
| 1862 | MARLIN | Grimes County, TX | Oil & Gas Property | Sep 2025 |
| 1863 | MARLIN | Brazos County, TX | Oil & Gas Property | Jan 2026 |
| 1864 | MARLIN | La Salle County, TX | Oil & Gas Property | Jan 2026 |
| 1865 | MARLIN | Madison County, TX | Oil & Gas Property | Jan 2026 |
| 1866 | MARLIN 11S | Reeves County, TX | Oil & Gas Property | Jan 2026 |
| 1867 | MARLIN 27-34 1H | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1868 | MARLIN 32 | Glasscock County, TX | Oil & Gas Property | Jan 2026 |
| 1869 | MARLIN 47 | Glasscock County, TX | Oil & Gas Property | Jan 2026 |
| 1870 | MARLIN B STEPHENS | Indiana County, PA | Gas Property | Dec 2025 |
| 1871 | MARLIN FUNKA | Washington County, PA | Oil & Gas Property | Feb 2026 |
| 1872 | MARLIN STATE | Eddy County, NM | Oil & Gas Property | Jan 2026 |
| 1873 | MARLISUE QUEEN UNIT | Chaves County, NM | Oil Property | Feb 2007 |
| 1874 | MARLOW | Perry County, OH | Oil & Gas Property | Dec 2018 |
| 1875 | MARLOW BURNS | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1876 | MARLOW BURNS-BRADNA-LAI-COMM 1 1 | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1877 | MARLYS OLSON 31-1H | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1878 | MARMACONDA STATE 2-5-14-17 | Reeves County, TX | Oil & Gas Property | Jan 2026 |
| 1879 | MARMALARD | Reeves County, TX | Oil & Gas Property | Dec 2025 |
| 1880 | MARMET | Ellis County, TX | Gas Property | Jan 2026 |
| 1881 | MARMET | Kanawha County, WV | Gas Property | Dec 2020 |
| 1882 | MARMET COAL | Kanawha County, WV | Gas Property | Dec 2021 |
| 1883 | MARMIE | Barton County, KS | Oil Property | Dec 2025 |
| 1884 | MARMION-THORNHILL HC | Dimmit County, TX | Oil & Gas Property | Jan 2026 |
| 1885 | MARMO UNIT | Lee County, TX | Oil & Gas Property | Jan 2026 |
| 1886 | MARMON | Mountrail County, ND | Oil & Gas Property | Feb 2026 |
| 1887 | MARMON HAHN | Williams County, ND | Oil & Gas Property | Feb 2026 |
| 1888 | MARMONT | Toole County, MT | Gas Property | Dec 2025 |
| 1889 | MARMOT 19_18-16N-10W | Blaine County, OK | Oil & Gas Property | Jan 2026 |
| 1890 | MARMOT 55-14 UNIT | Reeves County, TX | Oil & Gas Property | Jan 2026 |
| 1891 | MARNA | Campbell County, WY | Oil & Gas Property | Dec 2025 |
| 1892 | MARNA KUEHNE | Campbell County, WY | Oil Property | Mar 1994 |
| 1893 | MARNER | Stanton County, KS | Gas Property | Dec 2025 |
| 1894 | MARNI | Moore County, TX | Oil & Gas Property | Jan 2026 |
| 1895 | MARNITA FIU 1-3-34XHM | Blaine County, OK | Oil & Gas Property | Jan 2026 |
| 1896 | MAROLYN | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 1897 | MARON UNIT A | Dewitt County, TX | Oil & Gas Property | Jan 2026 |
| 1898 | MARON-RESP-VASB ULW | Dewitt County, TX | Oil & Gas Property | Jan 2026 |
| 1899 | MARON-VASB USW B | Dewitt County, TX | Oil & Gas Property | Jan 2026 |
| 1900 | MARONE | Washington County, OK | Oil & Gas Property | Aug 2019 |