| 1801 | DEVON COAST | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1802 | DEVON INFILLS MSL | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1803 | DEVONIAN OIL CO | McKean County, PA | Gas Property | Dec 2025 |
| 1804 | DEVORE | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1805 | DEWEES | Bradford County, PA | Gas Property | Jun 2026 |
| 1806 | DEWEY | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 1807 | DEWING 05 100 0 | Bradford County, PA | Gas Property | Jun 2026 |
| 1808 | DEYARMIN | Indiana County, PA | Gas Property | Dec 2025 |
| 1809 | DF BROWN | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 1810 | DF GOURLEY | Jefferson County, PA | Gas Property | Dec 2025 |
| 1811 | DGSM | Bradford County, PA | Gas Property | Jun 2026 |
| 1812 | DIAMOND | Fayette County, PA | Gas Property | Dec 2024 |
| 1813 | DIAZ | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1814 | DIAZ FAMILY L P | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1815 | DIAZ FAMILY LP 0 | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1816 | DIAZ M 0 | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1817 | DIAZ M 06 | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1818 | DICARLO | Fayette County, PA | Oil & Gas Property | Jun 2026 |
| 1819 | DICE | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1820 | DICENZO | Fayette County, PA | Gas Property | Dec 2025 |
| 1821 | DICESARE F PARTNERSHIP 00 | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1822 | DICK | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1823 | DICK-1 | Indiana County, PA | Gas Property | Dec 2025 |
| 1824 | DICKEY | Armstrong County, PA | Gas Property | Jun 2026 |
| 1825 | DICKEY | Clearfield County, PA | Gas Property | Dec 2025 |
| 1826 | DICKEY | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1827 | DICKEY | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1828 | DICKEY LUMBER CO | Clearfield County, PA | Gas Property | Dec 2025 |
| 1829 | DICKINSON | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1830 | DIKEMAN | McKean County, PA | Oil Property | Dec 2023 |
| 1831 | DILLAWAY | Potter County, PA | Oil & Gas Property | Dec 2012 |
| 1832 | DILLINGER EDWIN | Fayette County, PA | Gas Property | Dec 2025 |
| 1833 | DILLON | Fayette County, PA | Gas Property | Dec 2025 |
| 1834 | DILLON | Cambria County, PA | Gas Property | Dec 2025 |
| 1835 | DIMMIG | Wyoming County, PA | Gas Property | Jun 2026 |
| 1836 | DINDIOS | Cambria County, PA | Gas Property | Dec 2025 |
| 1837 | DINNEEN | Crawford County, PA | Gas Property | Dec 2025 |
| 1838 | DIOCESE OF ERIE | Warren County, PA | Gas Property | Dec 2025 |
| 1839 | DIXON | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 1840 | DIXON | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1841 | DIXON S LIGHTCAP | Indiana County, PA | Gas Property | Dec 2025 |
| 1842 | DJ BRA | Bradford County, PA | Gas Property | Apr 2026 |
| 1843 | DK GAS/HOLLOBAUGH | Clarion County, PA | Gas Property | Dec 2025 |
| 1844 | DK GAS/ROGER SHORE TRACT | Clarion County, PA | Gas Property | Dec 2025 |
| 1845 | DMC PROPERTIES | Washington County, PA | Gas Property | Jun 2026 |
| 1846 | DOBROSIELSKI | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1847 | DOBROSIELSKI J 0 | Susquehanna County, PA | Gas Property | Jun 2026 |
| 1848 | DOBSON | Jefferson County, PA | Gas Property | Dec 2025 |
| 1849 | DOEBLER UNIT | Lycoming County, PA | Gas Property | Jun 2026 |
| 1850 | DOG RUN HUNTING CLUB UNIT | Lycoming County, PA | Gas Property | Jun 2026 |
| 1851 | DOLLIE BECKMAN | Clearfield County, PA | Gas Property | Dec 2025 |
| 1852 | DON C FREDERICK | Venango County, PA | Oil Property | Dec 2025 |
| 1853 | DON FLAMENCO | Greene County, PA | Gas Property | Jun 2026 |
| 1854 | DON J DAVIS A | Lycoming County, PA | Gas Property | Jun 2026 |
| 1855 | DONAHEY HEIRS | Washington County, PA | Oil Property | Dec 2012 |
| 1856 | DONAHOO | Washington County, PA | Gas Property | Jun 2026 |
| 1857 | DONAHUE & WHITE 0 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1858 | DONALD | Erie County, PA | Gas Property | Dec 2025 |
| 1859 | DONALD | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1860 | DONALD BOGDANSKI ET AL | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1861 | DONALD E & MABEL S MARTIN | Indiana County, PA | Gas Property | Dec 2025 |
| 1862 | DONALD G & LOIS JEAN WINDOWS | Armstrong County, PA | Gas Property | Dec 2025 |
| 1863 | DONALD H | Crawford County, PA | Gas Property | Dec 2025 |
| 1864 | DONALD MAUTHE | Clarion County, PA | Gas Property | Dec 2025 |
| 1865 | DONALD MCCRAY | Crawford County, PA | Gas Property | Dec 2025 |
| 1866 | DONALD P MCPHERSON | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1867 | DONALD POWELL | Jefferson County, PA | Gas Property | Dec 2025 |
| 1868 | DONALD SHIREY | Clarion County, PA | Gas Property | Dec 2025 |
| 1869 | DONALD STREAMS | Indiana County, PA | Gas Property | Dec 2025 |
| 1870 | DONALD STROUP | Armstrong County, PA | Gas Property | Dec 2025 |
| 1871 | DONALD W DEITZ | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 1872 | DONALD W STREAMS | Indiana County, PA | Gas Property | Dec 2025 |
| 1873 | DONEY | Westmoreland County, PA | Oil & Gas Property | Jun 2026 |
| 1874 | DONLEY | Greene County, PA | Oil & Gas Property | Jun 2026 |
| 1875 | DONNA | Bradford County, PA | Gas Property | Jun 2026 |
| 1876 | DONNA CLARE DC | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 1877 | DONOVAN OR STEWART RUN CLUB | Venango County, PA | Oil Property | Dec 2025 |
| 1878 | DONOVAN/STEWART RUN CLUB | Venango County, PA | Oil Property | Dec 2025 |
| 1879 | DORADO | Butler County, PA | Gas Property | Jun 2026 |
| 1880 | DORAZIO | Fayette County, PA | Gas Property | Dec 2025 |
| 1881 | DORN (02-180 | Tioga County, PA | Gas Property | Jun 2026 |
| 1882 | DOROTHEA TAYLOR T | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1883 | DOROTHY MCNAUGHTON | Indiana County, PA | Gas Property | Dec 2025 |
| 1884 | DORSCH UNIT | Butler County, PA | Oil & Gas Property | Jun 2026 |
| 1885 | DOSS | Bradford County, PA | Gas Property | Jun 2026 |
| 1886 | DOTTS | Clearfield County, PA | Gas Property | Dec 2025 |
| 1887 | DOTY | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1888 | DOUGHERTY | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 1889 | DOUGHERTY HEIRS | Clarion County, PA | Gas Property | Dec 2025 |
| 1890 | DOUGLAS BIEDA | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1891 | DOUGLAS E. BIEDA | Indiana County, PA | Gas Property | Dec 2025 |
| 1892 | DOUGLAS G MINICH | Clarion County, PA | Gas Property | Dec 2025 |
| 1893 | DOUGLAS HEIRS | Indiana County, PA | Gas Property | Dec 2025 |
| 1894 | DOUGLAS MINICH | Clarion County, PA | Gas Property | Dec 2025 |
| 1895 | DOUTHIT 00 | Jefferson County, PA | Gas Property | Dec 2025 |
| 1896 | DOVEN SPIKE | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 1897 | DOVERSPIKE | Armstrong County, PA | Gas Property | Dec 2025 |
| 1898 | DOVERSPIKE | Jefferson County, PA | Gas Property | Dec 2025 |
| 1899 | DOVERSPIKE EBERLE 00 | Armstrong County, PA | Gas Property | Dec 2025 |
| 1900 | DOWER | Warren County, PA | Oil & Gas Property | Dec 2025 |