| 1801 | DEFREEZE 1 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1802 | DELANEY J 651 | Tioga County, PA | Gas Property | Dec 2025 |
| 1803 | DELHAGEN | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1804 | DELIMA | Bradford County, PA | Gas Property | Nov 2025 |
| 1805 | DELORES E SHERMAN | Clarion County, PA | Gas Property | Dec 2025 |
| 1806 | DELP WOLFE | Jefferson County, PA | Gas Property | Dec 2025 |
| 1807 | DELTA | Lycoming County, PA | Gas Property | Dec 2025 |
| 1808 | DELTON STILES S | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 1809 | DELUCIA R | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1810 | DELUXE | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1811 | DEMILLS | Warren County, PA | Gas Property | Dec 2024 |
| 1812 | DENNIS BOYER | Armstrong County, PA | Gas Property | Dec 2025 |
| 1813 | DENNIS CHOLAK | Greene County, PA | Gas Property | Dec 2025 |
| 1814 | DENNIS MCHENRY | Clarion County, PA | Gas Property | Dec 2025 |
| 1815 | DENNIS SWEENEY | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1816 | DENT | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1817 | DENT & STOTLER | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1818 | DENT DEV DENT W | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1819 | DENT NORTHEAST 1 | McKean County, PA | Oil & Gas Property | Dec 2018 |
| 1820 | DEPAOLA | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1821 | DEPUE | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1822 | DEREMER | Bradford County, PA | Gas Property | Oct 2025 |
| 1823 | DERIANCHO | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1824 | DERMOTTA | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1825 | DERR 854 | Lycoming County, PA | Gas Property | Dec 2025 |
| 1826 | DESIMONE | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1827 | DESLAURIERS | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 1828 | DETTERICK 8510H | Lycoming County, PA | Gas Property | Dec 2025 |
| 1829 | DETWEILER | Tioga County, PA | Gas Property | Dec 2025 |
| 1830 | DETWEILER 02 100 0 | Tioga County, PA | Gas Property | Dec 2025 |
| 1831 | DETWEILER J 235A | Tioga County, PA | Gas Property | Dec 2025 |
| 1832 | DEVINNEY UNIT | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1833 | DEVLING | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1834 | DEVON | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1835 | DEVON COAST | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1836 | DEVON INFILLS MSL | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1837 | DEVONIAN OIL CO | McKean County, PA | Gas Property | Dec 2025 |
| 1838 | DEVORE | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1839 | DEWEES | Bradford County, PA | Gas Property | Dec 2025 |
| 1840 | DEWEY | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 1841 | DEWING 05 100 0 | Bradford County, PA | Gas Property | Dec 2025 |
| 1842 | DEYARMIN | Indiana County, PA | Gas Property | Dec 2025 |
| 1843 | DF BROWN | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 1844 | DF GOURLEY | Jefferson County, PA | Gas Property | Dec 2025 |
| 1845 | DGSM | Bradford County, PA | Gas Property | Dec 2025 |
| 1846 | DIAMOND | Fayette County, PA | Gas Property | Dec 2024 |
| 1847 | DIAZ | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1848 | DIAZ FAMILY L P | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1849 | DIAZ FAMILY LP 0 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1850 | DIAZ M 0 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1851 | DIAZ M 06 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1852 | DICARLO | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1853 | DICE | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1854 | DICENZO | Fayette County, PA | Gas Property | Dec 2025 |
| 1855 | DICESARE F PARTNERSHIP 00 | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1856 | DICK | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 1857 | DICK-1 | Indiana County, PA | Gas Property | Dec 2025 |
| 1858 | DICKEY | Armstrong County, PA | Gas Property | Dec 2025 |
| 1859 | DICKEY | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1860 | DICKEY | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1861 | DICKEY | Clearfield County, PA | Gas Property | Dec 2025 |
| 1862 | DICKEY LUMBER CO | Clearfield County, PA | Gas Property | Dec 2025 |
| 1863 | DICKINSON | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1864 | DIKEMAN | McKean County, PA | Oil Property | Dec 2023 |
| 1865 | DILLAWAY | Potter County, PA | Oil & Gas Property | Dec 2012 |
| 1866 | DILLINGER EDWIN | Fayette County, PA | Gas Property | Dec 2024 |
| 1867 | DILLON | Cambria County, PA | Gas Property | Dec 2025 |
| 1868 | DILLON | Fayette County, PA | Gas Property | Dec 2025 |
| 1869 | DIMMIG | Wyoming County, PA | Gas Property | Dec 2025 |
| 1870 | DINDIOS | Cambria County, PA | Gas Property | Dec 2025 |
| 1871 | DINNEEN | Crawford County, PA | Gas Property | Dec 2024 |
| 1872 | DIOCESE OF ERIE | Warren County, PA | Gas Property | Dec 2024 |
| 1873 | DIXON | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1874 | DIXON | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 1875 | DIXON S LIGHTCAP | Indiana County, PA | Gas Property | Dec 2025 |
| 1876 | DJ BRA | Bradford County, PA | Gas Property | Dec 2025 |
| 1877 | DK GAS/HOLLOBAUGH | Clarion County, PA | Gas Property | Dec 2025 |
| 1878 | DK GAS/ROGER SHORE TRACT | Clarion County, PA | Gas Property | Dec 2025 |
| 1879 | DMC PROPERTIES | Washington County, PA | Gas Property | Dec 2025 |
| 1880 | DOBROSIELSKI | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1881 | DOBSON | Jefferson County, PA | Gas Property | Dec 2025 |
| 1882 | DOEBLER UNIT | Lycoming County, PA | Gas Property | Dec 2025 |
| 1883 | DOG RUN HUNTING CLUB UNIT | Lycoming County, PA | Gas Property | Dec 2025 |
| 1884 | DOLLIE BECKMAN | Clearfield County, PA | Gas Property | Dec 2025 |
| 1885 | DON C FREDERICK | Venango County, PA | Oil Property | Dec 2025 |
| 1886 | DON FLAMENCO | Greene County, PA | Gas Property | Dec 2025 |
| 1887 | DON J DAVIS A | Lycoming County, PA | Gas Property | Dec 2025 |
| 1888 | DONAHEY HEIRS | Washington County, PA | Oil Property | Dec 2012 |
| 1889 | DONAHOO | Washington County, PA | Gas Property | Dec 2025 |
| 1890 | DONAHUE & WHITE 0 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1891 | DONALD | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1892 | DONALD | Erie County, PA | Gas Property | Dec 2025 |
| 1893 | DONALD BOGDANSKI ET AL | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1894 | DONALD E & MABEL S MARTIN | Indiana County, PA | Gas Property | Dec 2025 |
| 1895 | DONALD G & LOIS JEAN WINDOWS | Armstrong County, PA | Gas Property | Dec 2025 |
| 1896 | DONALD H | Crawford County, PA | Gas Property | Dec 2024 |
| 1897 | DONALD MAUTHE | Clarion County, PA | Gas Property | Dec 2025 |
| 1898 | DONALD MCCRAY | Crawford County, PA | Gas Property | Dec 2024 |
| 1899 | DONALD P MCPHERSON | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 1900 | DONALD POWELL | Jefferson County, PA | Gas Property | Dec 2025 |