| 1901 | OUTLAW 22 FEDERAL COM | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1902 | OUTLAW 55-1-30 UNIT 1H | Loving County, TX | Oil & Gas Property | Nov 2025 |
| 1903 | OUTLAW FLATS | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1904 | OUTLAW GAP | McKenzie County, ND | Oil & Gas Property | Dec 2025 |
| 1905 | OUTLAW STATE | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1906 | OUTLOOK | Sheridan County, MT | Oil & Gas Property | Aug 1996 |
| 1907 | OUTPOST 22-24 | Las Animas County, CO | Gas Property | Dec 2025 |
| 1908 | OUTRIDER | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1909 | OUTRIDER 27 FEDERAL COM | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1910 | OUTRIDER 28 FEDERAL COM | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1911 | OUTTERSIDE A. J | Galveston County, TX | Oil & Gas Property | Oct 2025 |
| 1912 | OV UNIT | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 1913 | OVATION FEDERAL COM 1318 | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1914 | OVER | Clarion County, PA | Gas Property | Dec 2025 |
| 1915 | OVER | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 1916 | OVERACKER | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 1917 | OVERAL 5892 11-30T | Mountrail County, ND | Oil & Gas Property | Dec 2025 |
| 1918 | OVERALL | Anderson County, KS | Oil Property | Aug 2025 |
| 1919 | OVERALL | Coleman County, TX | Oil & Gas Property | Oct 2025 |
| 1920 | OVERALL | Reno County, KS | Oil & Gas Property | Sep 2025 |
| 1921 | OVERBEY | Wichita County, TX | Oil & Gas Property | Nov 2025 |
| 1922 | OVERBEY 28-14 #1 | Conecuh County, AL | Oil & Gas Property | Dec 2025 |
| 1923 | OVERBROOK FEE | Campbell County, WY | Gas Property | Jun 2013 |
| 1924 | OVERBY | Wichita County, TX | Oil & Gas Property | Oct 2025 |
| 1925 | OVERBY | Toole County, MT | Gas Property | Sep 2025 |
| 1926 | OVERBY 15-1 | Conecuh County, AL | Oil & Gas Property | Dec 2025 |
| 1927 | OVERBY C. J | Karnes County, TX | Oil & Gas Property | Apr 2015 |
| 1928 | OVERBY GAS UNIT 2E | Bee County, TX | Oil & Gas Property | Nov 2025 |
| 1929 | OVERCASH | Throckmorton County, TX | Oil & Gas Property | Nov 2025 |
| 1930 | OVERDORF | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1931 | OVERFIELD | Henderson County, KY | Oil Property | Nov 2019 |
| 1932 | OVERFIELD | Henderson County, KY | Oil Property | Oct 2014 |
| 1933 | OVERHOLSER | Rooks County, KS | Oil Property | Sep 2025 |
| 1934 | OVERHOLT | Claiborne Parish, LA | Oil Property | Dec 2024 |
| 1935 | OVERLAND | Wagoner County, OK | Oil & Gas Property | Sep 2022 |
| 1936 | OVERLAND 1 | Burke County, ND | Oil & Gas Property | Dec 2025 |
| 1937 | OVERLAND 20-17-162-98H 4MD | Divide County, ND | Oil & Gas Property | Dec 2025 |
| 1938 | OVERLAND ANDERSON | Kern County, CA | Oil & Gas Property | Nov 2018 |
| 1939 | OVERLEE | Burke County, ND | Oil & Gas Property | Dec 2025 |
| 1940 | OVERLOAD 23-19 | Las Animas County, CO | Gas Property | Dec 2025 |
| 1941 | OVERLOOK | Weld County, CO | Oil & Gas Property | Dec 2024 |
| 1942 | OVERLOOK | Seminole County, OK | Oil & Gas Property | Dec 2012 |
| 1943 | OVERLOOK | Grady County, OK | Oil & Gas Property | Nov 2025 |
| 1944 | OVERLOOK DEV | Montgomery County, KS | Oil Property | Sep 2025 |
| 1945 | OVERLOON 1-34H1 | Billings County, ND | Oil & Gas Property | Dec 2025 |
| 1946 | OVERLORD 33 32 FEDERAL COM | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1947 | OVERMAN | Kay County, OK | Oil & Gas Property | Aug 2023 |
| 1948 | OVERMAN | Cowley County, KS | Oil & Gas Property | Dec 2022 |
| 1949 | OVERMYER | Ford County, KS | Oil & Gas Property | Sep 2025 |
| 1950 | OVERPASS 1 | Jackson County, TX | Oil & Gas Property | Nov 2025 |
| 1951 | OVERSHOWN GAS UNIT | Houston County, TX | Oil & Gas Property | Nov 2025 |
| 1952 | OVERSTREET | Haskell County, OK | Gas Property | Nov 2025 |
| 1953 | OVERSTREET | Le Flore County, OK | Gas Property | Feb 2016 |
| 1954 | OVERSTREET | Washita County, OK | Oil & Gas Property | Sep 2022 |
| 1955 | OVERSTREET | Cooke County, TX | Oil Property | Nov 2025 |
| 1956 | OVERSTREET | Polk County, TX | Oil & Gas Property | Apr 2025 |
| 1957 | OVERSTREET | Seminole County, OK | Oil & Gas Property | Jun 2025 |
| 1958 | OVERTON | Garfield County, OK | Oil & Gas Property | May 2016 |
| 1959 | OVERTON | Smith County, TX | Oil & Gas Property | Nov 2025 |
| 1960 | OVERTON | Ritchie County, WV | Oil & Gas Property | Dec 2021 |
| 1961 | OVERTON | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1962 | OVERTON | Logan County, OK | Oil & Gas Property | Oct 2025 |
| 1963 | OVERTON | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1964 | OVERTON | Christian County, KY | Oil Property | Jul 2022 |
| 1965 | OVERTON | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1966 | OVERTON | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 1967 | OVERTON | Glasscock County, TX | Oil & Gas Property | Nov 2025 |
| 1968 | OVERTON | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1969 | OVERTON | Adams County, MS | Oil & Gas Property | Dec 2025 |
| 1970 | OVERTON BEN | Brown County, TX | Oil & Gas Property | Nov 2025 |
| 1971 | OVERTON G | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 1972 | OVERTON NE (PETTIT -A-) UNIT | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 1973 | OVIATT | Major County, OK | Oil & Gas Property | Jan 2006 |
| 1974 | OVMLC | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 1975 | OW PROPER | Elk County, PA | Gas Property | Dec 2025 |
| 1976 | OWAN 14B-22HN | Divide County, ND | Oil & Gas Property | Dec 2025 |
| 1977 | OWASCO UNIT | Kimball County, NE | Oil Property | Dec 2024 |
| 1978 | OWC 0 | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1979 | OWE 0 | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1980 | OWEN | Uinta County, WY | Oil & Gas Property | Dec 2025 |
| 1981 | OWEN | San Juan County, NM | Oil & Gas Property | Dec 2025 |
| 1982 | OWEN | Logan County, KS | Oil Property | Sep 2025 |
| 1983 | OWEN | Stafford County, KS | Oil Property | Mar 1992 |
| 1984 | OWEN | Moore County, TX | Oil & Gas Property | Nov 2025 |
| 1985 | OWEN | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1986 | OWEN | Johnson County, TX | Oil & Gas Property | Nov 2025 |
| 1987 | OWEN | Burleson County, TX | Oil & Gas Property | Nov 2025 |
| 1988 | OWEN | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 1989 | OWEN | Jack County, TX | Oil & Gas Property | Apr 2025 |
| 1990 | OWEN | Ector County, TX | Oil & Gas Property | Nov 2025 |
| 1991 | OWEN | Jack County, TX | Oil & Gas Property | Nov 2025 |
| 1992 | OWEN | Young County, TX | Oil & Gas Property | Nov 2025 |
| 1993 | OWEN | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 1994 | OWEN 1 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 1995 | OWEN 2 | Dewey County, OK | Oil & Gas Property | Nov 2025 |
| 1996 | OWEN BEN 30-16-22 1H | Roger Mills County, OK | Oil & Gas Property | Nov 2025 |
| 1997 | OWEN CHALK | Howard County, TX | Oil & Gas Property | Nov 2025 |
| 1998 | OWEN DOWDY | Stevens County, KS | Oil Property | Aug 2017 |
| 1999 | OWEN F | Burleson County, TX | Oil & Gas Property | May 2022 |
| 2000 | OWEN F | Knox County, OH | Oil Property | Dec 2017 |