| 1901 | ALLAR UNIT | Tyler County, TX | Oil & Gas Property | Nov 2025 |
| 1902 | ALLAR-C | Hansford County, TX | Oil & Gas Property | Nov 2025 |
| 1903 | ALLAR-CALLAWAY 27 | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 1904 | ALLAR-CHRISTIE | Young County, TX | Oil & Gas Property | Nov 2025 |
| 1905 | ALLAR-KING | Young County, TX | Oil & Gas Property | Nov 2025 |
| 1906 | ALLAR-MARSTON | Ward County, TX | Oil & Gas Property | Nov 2025 |
| 1907 | ALLARD | Seward County, KS | Gas Property | Sep 2025 |
| 1908 | ALLARD | Medina County, OH | Oil & Gas Property | Dec 2024 |
| 1909 | ALLARD | Jackson County, CO | Oil Property | Nov 2015 |
| 1910 | ALLBERG | Andrews County, TX | Oil & Gas Property | Nov 2025 |
| 1911 | ALLBERT | Ellis County, KS | Oil Property | Sep 2025 |
| 1912 | ALLBRIGHT | Marion County, TX | Oil & Gas Property | Nov 2025 |
| 1913 | ALLBRITTEN | Stevens County, KS | Gas Property | Sep 2025 |
| 1914 | ALLBRITTEN | Grant County, KS | Gas Property | Sep 2025 |
| 1915 | ALLBRITTON | Leon County, TX | Oil & Gas Property | Nov 2025 |
| 1916 | ALLBRITTON | Andrews County, TX | Oil & Gas Property | Nov 2025 |
| 1917 | ALLBRITTON | Red River Parish, LA | Gas Property | Dec 2024 |
| 1918 | ALLBRITTON | Leon County, TX | Oil & Gas Property | Nov 2025 |
| 1919 | ALLDALE | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 1920 | ALLDAY | Cass County, TX | Oil & Gas Property | Nov 2025 |
| 1921 | ALLDAY | Harrison County, TX | Oil & Gas Property | Nov 2025 |
| 1922 | ALLDAY | Marion County, TX | Oil & Gas Property | Nov 2025 |
| 1923 | ALLDAY | Howard County, TX | Oil & Gas Property | Oct 2025 |
| 1924 | ALLDAY SUPPLY COMPANY | Cass County, TX | Oil & Gas Property | Nov 2025 |
| 1925 | ALLDER | Nevada County, AR | Oil Property | Nov 2025 |
| 1926 | ALLDREDGE | Fisher County, TX | Oil & Gas Property | Dec 2019 |
| 1927 | ALLEDER | Midland County, TX | Oil & Gas Property | Nov 2025 |
| 1928 | ALLEE | Dimmit County, TX | Oil & Gas Property | Nov 2025 |
| 1929 | ALLEE | Roger Mills County, OK | Oil & Gas Property | Nov 2025 |
| 1930 | ALLEE UNIT | Dimmit County, TX | Oil & Gas Property | Nov 2025 |
| 1931 | ALLEGANY | Potter County, PA | Gas Property | Dec 2025 |
| 1932 | ALLEGHENY ENERGY | Allegheny County, PA | Gas Property | Dec 2025 |
| 1933 | ALLEGHENY LAND CO | Boone County, WV | Gas Property | Dec 2021 |
| 1934 | ALLEGHENY LAND CO | Boone County, WV | Oil & Gas Property | Dec 2021 |
| 1935 | ALLEGHENY LUDLUM STEEL CORP | Westmoreland County, PA | Gas Property | Dec 2025 |
| 1936 | ALLEGHENY METALS | Armstrong County, PA | Gas Property | Dec 2024 |
| 1937 | ALLEGHENY MINERAL | Armstrong County, PA | Gas Property | Dec 2025 |
| 1938 | ALLEGHENY MINERAL CORP | Armstrong County, PA | Gas Property | Dec 2025 |
| 1939 | ALLEGHENY N | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1940 | ALLEGHENY N | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1941 | ALLEGHENY NAT | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1942 | ALLEGHENY NAT | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 1943 | ALLEGHENY NAT | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1944 | ALLEGHENY NATIONAL FOREST | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1945 | ALLEGHENY NATL FOREST | Elk County, PA | Gas Property | Dec 2025 |
| 1946 | ALLEGHENY NATL FOREST 1 | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 1947 | ALLEGHENY NATL FOREST LOT 7 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 1948 | ALLEGHENY NATL FOREST WARRANT 5195 95 | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 1949 | ALLEGHENY RIDGE WEST HILLEGAS | Lycoming County, PA | Gas Property | Dec 2025 |
| 1950 | ALLEGHENY RIVER MIN | Jefferson County, PA | Oil & Gas Property | Dec 2025 |
| 1951 | ALLEGHENY RIVER MINI | Jefferson County, PA | Gas Property | Dec 2025 |
| 1952 | ALLEGHENY WOOD PROD | Braxton County, WV | Oil & Gas Property | Dec 2021 |
| 1953 | ALLEGRA | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 1954 | ALLEIN | Sterling County, TX | Oil & Gas Property | Nov 2025 |
| 1955 | ALLEMAN 1 | Haskell County, KS | Gas Property | Sep 2025 |
| 1956 | ALLEMAN, LENA K | Wood County, WV | Oil & Gas Property | Dec 2021 |
| 1957 | ALLEMAND | Converse County, WY | Oil & Gas Property | Dec 2025 |
| 1958 | ALLEMAND | Converse County, WY | Oil & Gas Property | Dec 2025 |
| 1959 | ALLEN | Brown County, TX | Oil & Gas Property | Nov 2025 |
| 1960 | ALLEN | Atoka County, OK | Oil & Gas Property | Nov 2025 |
| 1961 | ALLEN | Texas County, OK | Oil & Gas Property | Jan 2020 |
| 1962 | ALLEN | Fayette County, PA | Gas Property | Dec 2025 |
| 1963 | ALLEN | Eddy County, NM | Oil & Gas Property | Dec 2018 |
| 1964 | ALLEN | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1965 | ALLEN | Lafayette County, AR | Oil Property | Sep 1989 |
| 1966 | ALLEN | Cattaraugus County, NY | Gas Property | Dec 2024 |
| 1967 | ALLEN | Canadian County, OK | Oil & Gas Property | Nov 2025 |
| 1968 | ALLEN | Lafayette County, AR | Oil Property | Nov 2025 |
| 1969 | ALLEN | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 1970 | ALLEN | Bradford County, PA | Gas Property | Dec 2025 |
| 1971 | ALLEN | Washington County, CO | Oil & Gas Property | Dec 2025 |
| 1972 | ALLEN | Woodson County, KS | Oil Property | Jun 2025 |
| 1973 | ALLEN | Garvin County, OK | Oil Property | Jun 2023 |
| 1974 | ALLEN | Wise County, TX | Oil & Gas Property | Nov 2025 |
| 1975 | ALLEN | Colorado County, TX | Oil & Gas Property | Jan 2022 |
| 1976 | ALLEN | Floyd County, KY | Oil & Gas Property | Dec 2023 |
| 1977 | ALLEN | Knott County, KY | Oil & Gas Property | Dec 2023 |
| 1978 | ALLEN | Texas County, OK | Gas Property | Nov 2025 |
| 1979 | ALLEN | Washington County, OK | Oil Property | Oct 2025 |
| 1980 | ALLEN | Loving County, TX | Oil & Gas Property | Sep 2021 |
| 1981 | ALLEN | Beaver County, OK | Oil & Gas Property | Feb 2022 |
| 1982 | ALLEN | Roger Mills County, OK | Oil & Gas Property | Nov 2025 |
| 1983 | ALLEN | Shelby County, TX | Oil & Gas Property | Nov 2025 |
| 1984 | ALLEN | Alfalfa County, OK | Oil & Gas Property | Nov 2025 |
| 1985 | ALLEN | Lasalle Parish, LA | Oil & Gas Property | Jan 2025 |
| 1986 | ALLEN | San Juan County, NM | Oil & Gas Property | Dec 2025 |
| 1987 | ALLEN | Morgan County, OH | Oil & Gas Property | Dec 2024 |
| 1988 | ALLEN | Eastland County, TX | Oil & Gas Property | Sep 2025 |
| 1989 | ALLEN | Pottawatomie County, OK | Oil Property | Nov 2025 |
| 1990 | ALLEN | Harrison County, TX | Oil & Gas Property | Oct 2025 |
| 1991 | ALLEN | Ouachita County, AR | Oil & Gas Property | Nov 2025 |
| 1992 | ALLEN | Cleburne County, AR | Gas Property | Jul 2024 |
| 1993 | ALLEN | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1994 | ALLEN | Perry County, OH | Oil & Gas Property | Dec 2024 |
| 1995 | ALLEN | Stephens County, OK | Oil Property | Jun 2019 |
| 1996 | ALLEN | Lafayette County, AR | Oil Property | Apr 1981 |
| 1997 | ALLEN | Montgomery County, KS | Oil Property | Oct 2024 |
| 1998 | ALLEN | Montgomery County, KS | Oil Property | Sep 2025 |
| 1999 | ALLEN | Magoffin County, KY | Oil Property | Dec 2014 |
| 2000 | ALLEN | Roger Mills County, OK | Oil & Gas Property | Jan 2024 |