| 1801 | ALKALI BUTTE | Fremont County, WY | Oil & Gas Property | Dec 2015 |
| 1802 | ALKALI CREEK 4 | McKenzie County, ND | Oil & Gas Property | Feb 2026 |
| 1803 | ALKALI FEDERAL | Chaves County, NM | Oil & Gas Property | Jan 2026 |
| 1804 | ALKALI GULCH | Sweetwater County, WY | Oil & Gas Property | Jan 2026 |
| 1805 | ALKALINE EARTH | Midland County, TX | Oil & Gas Property | Jan 2026 |
| 1806 | ALKAN | Bradford County, PA | Gas Property | Jan 2026 |
| 1807 | ALKAR FARMS | Major County, OK | Oil & Gas Property | Dec 2025 |
| 1808 | ALKEK | Maverick County, TX | Oil & Gas Property | Dec 2015 |
| 1809 | ALKIRE | Lewis County, WV | Oil & Gas Property | Dec 2021 |
| 1810 | ALL ALONG 1525-17 FED COM | Chaves County, NM | Oil & Gas Property | Oct 2025 |
| 1811 | ALL ALONG THE W | Ness County, KS | Oil Property | Nov 2025 |
| 1812 | ALL IN BS | Reeves County, TX | Oil & Gas Property | May 2025 |
| 1813 | ALL NIGHT CREEK | Campbell County, WY | Oil & Gas Property | Feb 2026 |
| 1814 | ALL NIGHT CREEK UN | Campbell County, WY | Gas Property | Jun 2017 |
| 1815 | ALL RIV MNG CO 1 | Armstrong County, PA | Gas Property | Dec 2025 |
| 1816 | ALL SAINTS | Summit County, OH | Oil & Gas Property | Dec 2020 |
| 1817 | ALL STATE STAR | Antrim County, MI | Gas Property | Aug 2025 |
| 1818 | ALL STATES | Stark County, OH | Oil & Gas Property | Dec 2025 |
| 1819 | ALLAIN-LEBRETON | Lafourche Parish, LA | Oil & Gas Property | Dec 2024 |
| 1820 | ALLAM | Venango County, PA | Oil & Gas Property | Jan 2026 |
| 1821 | ALLAM | Johnson County, AR | Gas Property | May 2014 |
| 1822 | ALLAN 14-23H | Stark County, ND | Oil & Gas Property | Feb 2026 |
| 1823 | ALLAN COMPANY | Lafourche Parish, LA | Oil & Gas Property | Dec 2024 |
| 1824 | ALLAN H UNIT | Boulder County, CO | Oil & Gas Property | Jan 2026 |
| 1825 | ALLAN HART | Crawford County, PA | Oil & Gas Property | Dec 2025 |
| 1826 | ALLAN MARBURGER | Bastrop County, TX | Oil & Gas Property | Apr 2025 |
| 1827 | ALLAR | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1828 | ALLAR | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1829 | ALLAR | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1830 | ALLAR | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1831 | ALLAR | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1832 | ALLAR | Cass County, TX | Oil & Gas Property | Jan 2026 |
| 1833 | ALLAR | Howard County, TX | Oil & Gas Property | Dec 2025 |
| 1834 | ALLAR | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1835 | ALLAR | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1836 | ALLAR | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 1837 | ALLAR | Stephens County, TX | Oil & Gas Property | Jan 2026 |
| 1838 | ALLAR | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1839 | ALLAR | San Jacinto County, TX | Oil & Gas Property | Jan 2026 |
| 1840 | ALLAR | Stephens County, TX | Oil & Gas Property | Jan 2026 |
| 1841 | ALLAR | Hansford County, TX | Gas Property | Dec 2025 |
| 1842 | ALLAR | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1843 | ALLAR COMPANY A | Jack County, TX | Oil & Gas Property | Jan 2026 |
| 1844 | ALLAR J | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1845 | ALLAR SEIDEL UNIT | La Salle County, TX | Oil & Gas Property | Jan 2026 |
| 1846 | ALLAR STATE UNIT 2877 | Reeves County, TX | Oil & Gas Property | Jan 2026 |
| 1847 | ALLAR UNIT | Tyler County, TX | Oil & Gas Property | Jan 2026 |
| 1848 | ALLAR-C | Hansford County, TX | Oil & Gas Property | Dec 2025 |
| 1849 | ALLAR-CALLAWAY 27 | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1850 | ALLAR-CHRISTIE | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1851 | ALLAR-KING | Young County, TX | Oil & Gas Property | Jan 2026 |
| 1852 | ALLAR-MARSTON | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 1853 | ALLARD | Jackson County, CO | Oil Property | Nov 2015 |
| 1854 | ALLARD | Seward County, KS | Gas Property | Nov 2025 |
| 1855 | ALLARD | Medina County, OH | Oil & Gas Property | Dec 2024 |
| 1856 | ALLBERG | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 1857 | ALLBERT | Ellis County, KS | Oil Property | Oct 2025 |
| 1858 | ALLBRIGHT | Marion County, TX | Oil & Gas Property | Jan 2026 |
| 1859 | ALLBRITTEN | Grant County, KS | Gas Property | Nov 2025 |
| 1860 | ALLBRITTEN | Stevens County, KS | Gas Property | Nov 2025 |
| 1861 | ALLBRITTON | Red River Parish, LA | Gas Property | Dec 2024 |
| 1862 | ALLBRITTON | Leon County, TX | Oil & Gas Property | Jan 2026 |
| 1863 | ALLBRITTON | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 1864 | ALLBRITTON | Leon County, TX | Oil & Gas Property | Jan 2026 |
| 1865 | ALLDALE | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 1866 | ALLDAY | Cass County, TX | Oil & Gas Property | Jan 2026 |
| 1867 | ALLDAY | Harrison County, TX | Oil & Gas Property | Jan 2026 |
| 1868 | ALLDAY | Marion County, TX | Oil & Gas Property | Dec 2025 |
| 1869 | ALLDAY | Howard County, TX | Oil & Gas Property | Dec 2025 |
| 1870 | ALLDAY SUPPLY COMPANY | Cass County, TX | Oil & Gas Property | Jan 2026 |
| 1871 | ALLDER | Nevada County, AR | Oil Property | Dec 2025 |
| 1872 | ALLDREDGE | Fisher County, TX | Oil & Gas Property | Dec 2019 |
| 1873 | ALLEDER | Midland County, TX | Oil & Gas Property | Jan 2026 |
| 1874 | ALLEE | Dimmit County, TX | Oil & Gas Property | Jan 2026 |
| 1875 | ALLEE | Roger Mills County, OK | Oil & Gas Property | Dec 2025 |
| 1876 | ALLEE UNIT | Dimmit County, TX | Oil & Gas Property | Jan 2026 |
| 1877 | ALLEGANY | Potter County, PA | Gas Property | Jan 2026 |
| 1878 | ALLEGHENY ENERGY | Allegheny County, PA | Gas Property | Dec 2025 |
| 1879 | ALLEGHENY LAND CO | Boone County, WV | Oil & Gas Property | Dec 2021 |
| 1880 | ALLEGHENY LAND CO | Boone County, WV | Gas Property | Dec 2021 |
| 1881 | ALLEGHENY LUDLUM STEEL CORP | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1882 | ALLEGHENY METALS | Armstrong County, PA | Gas Property | Dec 2024 |
| 1883 | ALLEGHENY MINERAL | Armstrong County, PA | Gas Property | Dec 2025 |
| 1884 | ALLEGHENY MINERAL CORP | Armstrong County, PA | Gas Property | Dec 2025 |
| 1885 | ALLEGHENY N | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1886 | ALLEGHENY N | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1887 | ALLEGHENY NAT | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1888 | ALLEGHENY NAT | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1889 | ALLEGHENY NAT | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1890 | ALLEGHENY NATIONAL FOREST | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1891 | ALLEGHENY NATL FOREST | Elk County, PA | Gas Property | Dec 2025 |
| 1892 | ALLEGHENY NATL FOREST 1 | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 1893 | ALLEGHENY NATL FOREST LOT 7 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1894 | ALLEGHENY NATL FOREST WARRANT 5195 95 | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 1895 | ALLEGHENY RIDGE WEST HILLEGAS | Lycoming County, PA | Gas Property | Jan 2026 |
| 1896 | ALLEGHENY RIVER MIN | Jefferson County, PA | Oil & Gas Property | Dec 2025 |
| 1897 | ALLEGHENY RIVER MINI | Jefferson County, PA | Gas Property | Dec 2025 |
| 1898 | ALLEGHENY WOOD PROD | Braxton County, WV | Oil & Gas Property | Dec 2021 |
| 1899 | ALLEGRA | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 1900 | ALLEIN | Sterling County, TX | Oil & Gas Property | Jan 2026 |