| 1901 | MARKLEY | Elk County, KS | Oil Property | Sep 2025 |
| 1902 | MARKLEY | Wayne County, OH | Gas Property | Dec 2024 |
| 1903 | MARKLEY | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1904 | MARKLEY ELIZABETH | Tuscarawas County, OH | Oil & Gas Property | Dec 2022 |
| 1905 | MARKLEY FANNIE | Lipscomb County, TX | Oil & Gas Property | Nov 2025 |
| 1906 | MARKOVICH,JOHN FOUR STATES UNIT A | Marion County, WV | Gas Property | Dec 2021 |
| 1907 | MARKOVITCH | Susquehanna County, PA | Gas Property | Dec 2025 |
| 1908 | MARKS | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1909 | MARKS | Jack County, TX | Oil & Gas Property | Nov 2025 |
| 1910 | MARKS | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1911 | MARKS | Goliad County, TX | Oil & Gas Property | Oct 2017 |
| 1912 | MARKS | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1913 | MARKS 'A' | Morton County, KS | Gas Property | Sep 2025 |
| 1914 | MARKS POOVEY GAS UNIT 1 | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 1915 | MARKS, C | Roane County, WV | Oil & Gas Property | Dec 2021 |
| 1916 | MARKS, J | Lewis County, WV | Oil & Gas Property | Dec 2021 |
| 1917 | MARKS, JAMES J | Lewis County, WV | Gas Property | Dec 2021 |
| 1918 | MARKS, JERRY M | Gilmer County, WV | Oil & Gas Property | Dec 2021 |
| 1919 | MARKS, ORMEDA | Gilmer County, WV | Oil & Gas Property | Dec 2021 |
| 1920 | MARKS, P | Wirt County, WV | Oil & Gas Property | Dec 2021 |
| 1921 | MARKULIC, F | Allegan County, MI | Oil Property | Nov 2025 |
| 1922 | MARKUS | Kingfisher County, OK | Oil & Gas Property | Mar 2023 |
| 1923 | MARKWELL | Caddo County, OK | Oil Property | Sep 2008 |
| 1924 | MARKWITH, DENNIS | Ritchie County, WV | Oil & Gas Property | Dec 2021 |
| 1925 | MARLA | Richland County, MT | Oil & Gas Property | Dec 2025 |
| 1926 | MARLA 10 | Atascosa County, TX | Oil & Gas Property | Nov 2025 |
| 1927 | MARLAN DOWNEY | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1928 | MARLAND 41-14TFH | Mountrail County, ND | Oil & Gas Property | Dec 2025 |
| 1929 | MARLATT | Adams County, CO | Oil & Gas Property | Jun 2020 |
| 1930 | MARLATT | Major County, OK | Oil & Gas Property | Mar 2025 |
| 1931 | MARLATT | Coshocton County, OH | Oil & Gas Property | Dec 2007 |
| 1932 | MARLENE | Finney County, KS | Oil Property | Sep 2025 |
| 1933 | MARLENE | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1934 | MARLENE | Lane County, KS | Oil Property | Sep 2025 |
| 1935 | MARLENE 1-10H | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1936 | MARLENE 34-11TFH | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1937 | MARLENE 42X-20 | McKenzie County, ND | Oil & Gas Property | Dec 2025 |
| 1938 | MARLENE 5501 14-1T | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1939 | MARLENE LILI | Washington County, TX | Oil & Gas Property | Nov 2025 |
| 1940 | MARLENE OLSON | Live Oak County, TX | Oil & Gas Property | Nov 2025 |
| 1941 | MARLENE STEFFAN 1-5-8H-141-97 | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1942 | MARLER | Wilson County, KS | Gas Property | Mar 2025 |
| 1943 | MARLETT T. W | Wise County, TX | Oil & Gas Property | Nov 2025 |
| 1944 | MARLEY | Crockett County, TX | Oil & Gas Property | Oct 2025 |
| 1945 | MARLEY | Jack County, TX | Oil & Gas Property | Nov 2025 |
| 1946 | MARLEY | Jack County, TX | Oil & Gas Property | Apr 2025 |
| 1947 | MARLEY C01 | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 1948 | MARLEY STATE COM 31 | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1949 | MARLEY-FRANSSEN | Jack County, TX | Oil & Gas Property | Nov 2025 |
| 1950 | MARLIN | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1951 | MARLIN | Grimes County, TX | Oil & Gas Property | Sep 2025 |
| 1952 | MARLIN | Brazos County, TX | Oil & Gas Property | Oct 2025 |
| 1953 | MARLIN | La Salle County, TX | Oil & Gas Property | Nov 2025 |
| 1954 | MARLIN | Madison County, TX | Oil & Gas Property | Oct 2025 |
| 1955 | MARLIN | Dewey County, OK | Oil & Gas Property | Nov 2025 |
| 1956 | MARLIN 11S | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1957 | MARLIN 27-34 1H | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1958 | MARLIN 32 | Glasscock County, TX | Oil & Gas Property | Nov 2025 |
| 1959 | MARLIN 47 | Glasscock County, TX | Oil & Gas Property | Nov 2025 |
| 1960 | MARLIN B STEPHENS | Indiana County, PA | Gas Property | Dec 2024 |
| 1961 | MARLIN FUNKA | Washington County, PA | Oil & Gas Property | Dec 2025 |
| 1962 | MARLIN STATE | Eddy County, NM | Oil & Gas Property | Nov 2025 |
| 1963 | MARLISUE QUEEN UNIT | Chaves County, NM | Oil Property | Feb 2007 |
| 1964 | MARLOW | Perry County, OH | Oil & Gas Property | Dec 2018 |
| 1965 | MARLOW BURNS | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1966 | MARLOW BURNS-BRADNA-LAI-COMM 1 1 | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1967 | MARLYS OLSON 31-1H | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1968 | MARMACONDA STATE 2-5-14-17 | Reeves County, TX | Oil & Gas Property | Oct 2025 |
| 1969 | MARMALARD | Reeves County, TX | Oil & Gas Property | Oct 2025 |
| 1970 | MARMET | Ellis County, TX | Gas Property | Nov 2025 |
| 1971 | MARMET | Kanawha County, WV | Gas Property | Dec 2020 |
| 1972 | MARMET COAL | Kanawha County, WV | Gas Property | Dec 2021 |
| 1973 | MARMIE | Barton County, KS | Oil Property | Sep 2025 |
| 1974 | MARMION-THORNHILL HC | Dimmit County, TX | Oil & Gas Property | Nov 2025 |
| 1975 | MARMO UNIT | Lee County, TX | Oil & Gas Property | Nov 2025 |
| 1976 | MARMON | Mountrail County, ND | Oil & Gas Property | Dec 2025 |
| 1977 | MARMON HAHN | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1978 | MARMONT | Toole County, MT | Gas Property | Sep 2025 |
| 1979 | MARMOT 19_18-16N-10W | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1980 | MARMOT 55-14 UNIT | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1981 | MARNA | Campbell County, WY | Oil & Gas Property | Oct 2025 |
| 1982 | MARNA KUEHNE | Campbell County, WY | Oil Property | Mar 1994 |
| 1983 | MARNER | Stanton County, KS | Gas Property | Sep 2025 |
| 1984 | MARNI | Moore County, TX | Oil & Gas Property | Oct 2025 |
| 1985 | MARNITA FIU 1-3-34XHM | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1986 | MAROLYN | Crockett County, TX | Oil & Gas Property | Nov 2025 |
| 1987 | MARON UNIT A | Dewitt County, TX | Oil & Gas Property | Nov 2025 |
| 1988 | MARON-RESP-VASB ULW | Dewitt County, TX | Oil & Gas Property | Nov 2025 |
| 1989 | MARON-VASB USW B | Dewitt County, TX | Oil & Gas Property | Nov 2025 |
| 1990 | MARONE | Washington County, OK | Oil & Gas Property | Aug 2019 |
| 1991 | MARONEY | Harper County, KS | Oil & Gas Property | Sep 2025 |
| 1992 | MARONEY | Sabine Parish, LA | Oil & Gas Property | Dec 2024 |
| 1993 | MAROON 18 | Yuma County, CO | Gas Property | Nov 2025 |
| 1994 | MAROON BELLS 13-14 UNIT | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1995 | MAROON BELLS FEDERAL COM 16 32 36 SB | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1996 | MAROONER | Winkler County, TX | Oil & Gas Property | Nov 2025 |
| 1997 | MAROONS | Garvin County, OK | Oil & Gas Property | Nov 2025 |
| 1998 | MAROSCHER UNIT | Columbiana County, OH | Gas Property | Dec 2024 |
| 1999 | MARPAT | Bexar County, TX | Oil Property | Nov 2025 |
| 2000 | MARPLE | Wilson County, KS | Oil Property | Aug 2025 |