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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Koda GNB, LLC | Utah | 27,182 BBLs | 4,398,767 MCF | Nov 2025 - Nov 2025 |
| Koda Uinta, LLC | Utah | 108,400 BBLs | 7,569,964 MCF | Nov 2025 - Dec 2025 |
| L B Industries Inc | Utah | 0 BBLs | 0 MCF | Jul 1994 - Feb 1996 |
| L&L Oilfield Services Inc | Utah | 0 BBLs | 0 MCF | Feb 1990 - Feb 1992 |
| L&W Oil Company | Utah | 0 BBLs | 0 MCF | Dec 1989 - Apr 1994 |
| Lacy, R | Utah | 0 BBLs | 0 MCF | Jan 1958 - Apr 1989 |
| Ladd Petroleum Corporation | Utah | 0 BBLs | 0 MCF | Dec 1963 - Jan 1986 |
| Lancaster, J C | Utah | 0 BBLs | 0 MCF | Feb 1968 - May 1970 |
| Landmark Drilling Corp | Utah | 0 BBLs | 0 MCF | Jun 1981 - Jul 1982 |
| Lansdale, A | Utah | 0 BBLs | 0 MCF | Nov 1962 - Apr 1985 |
| Lansdale/Vukasovich | Utah | 0 BBLs | 0 MCF | Nov 1987 - Dec 1988 |
| Larsen Industries | Utah | 0 BBLs | 0 MCF | Feb 1960 - Dec 1960 |
| Larsen Thomas B | Utah | 0 BBLs | 0 MCF | Feb 1969 - Dec 1972 |
| Larsen, Lewis H | Utah | 0 BBLs | 0 MCF | Jun 1959 - Jun 1960 |
| Lehndorff/LGB Minerals Inc | Utah | 0 BBLs | 0 MCF | Jan 1988 - Mar 2002 |
| Lehndorff/LGB Minerals Inc | Utah | 0 BBLs | 0 MCF | Jan 1988 - Jan 1990 |
| Liberty Pioneer Energy Source, Inc | Utah | 0 BBLs | 0 MCF | Mar 2012 - Oct 2021 |
| Linmar Energy Corporation | Utah | 0 BBLs | 0 MCF | Aug 1981 - Oct 1987 |
| Linmar Petroleum Company | Utah | 0 BBLs | 0 MCF | Nov 1987 - Apr 1994 |
| Linmar Petroleum Company | Utah | 0 BBLs | 0 MCF | Jan 1982 - Oct 1995 |
| Linn Bros Oil & Gas Inc | Utah | 0 BBLs | 0 MCF | Mar 1970 - Dec 2025 |
| Linn Operating Inc | Utah | 0 BBLs | 0 MCF | Jun 2014 - May 2017 |
| Linn Operating LLC | Utah | 0 BBLs | 0 MCF | Jun 2017 - Apr 2018 |
| Lockridge, John P | Utah | 0 BBLs | 0 MCF | Oct 1984 - Mar 1999 |
| Lodestone Operating, Inc | Utah | 0 BBLs | 0 MCF | Oct 2002 - Jul 2020 |
| Lomax Exploration Company | Utah | 0 BBLs | 0 MCF | Apr 1981 - Jun 1995 |
| Lone MTN Production Co | Utah | 0 BBLs | 0 MCF | Jan 1981 - Jul 2019 |
| Luff Exploration Company | Utah | 0 BBLs | 0 MCF | Mar 1958 - Aug 1987 |
| Magnum DRL Services Inc | Utah | 0 BBLs | 0 MCF | Oct 2000 - Oct 2002 |
| Mainard, Richard | Utah | 0 BBLs | 0 MCF | Aug 1982 - Aug 1982 |
| Mak-J Energy Partners LTD | Utah | 0 BBLs | 0 MCF | Jul 2004 - Dec 2006 |
| Mapco Inc | Utah | 0 BBLs | 0 MCF | May 1973 - Dec 1983 |
| Mapco Oil & Gas Company | Utah | 0 BBLs | 0 MCF | Jan 1974 - Jan 1985 |
| Mapco Production Co | Utah | 0 BBLs | 0 MCF | Nov 1978 - Dec 1983 |
| Mar/Reg Oil Company | Utah | 183 BBLs | 0 MCF | Aug 1993 - Nov 2025 |
| Maralex Resources Inc | Utah | 0 BBLs | 0 MCF | Aug 1996 - Jun 1997 |
| Marathon Oil Company | Utah | 0 BBLs | 0 MCF | Oct 1982 - Nov 2016 |
| Marion Energy Inc | Utah | 0 BBLs | 0 MCF | Feb 2006 - May 2015 |
| Marks, T Keith | Utah | 0 BBLs | 0 MCF | Jan 1975 - Oct 1997 |
| Master Pet & Devel Co Inc | Utah | 0 BBLs | 0 MCF | Aug 1984 - Jul 1999 |
| Matrix Production Company | Utah | 748 BBLs | 1,607 MCF | Jun 2004 - Dec 2025 |
| Maximum Energy Corporation | Utah | 0 BBLs | 0 MCF | Apr 2008 - Jun 2024 |
| Maxus Exploration Co | Utah | 0 BBLs | 0 MCF | Apr 1987 - Nov 1991 |
| Mayers & Company | Utah | 0 BBLs | 0 MCF | Nov 1985 - May 1986 |
| MC Cullough Oil & Gas | Utah | 0 BBLs | 0 MCF | Aug 1973 - Jun 1980 |
| McAdams, J F | Utah | 0 BBLs | 0 MCF | Jun 1959 - May 1971 |
| McConnell, B L Operating | Utah | 0 BBLs | 0 MCF | Jan 1984 - Aug 1985 |
| McCulliss Resources Co Inc | Utah | 0 BBLs | 0 MCF | Jan 1981 - Jun 2009 |
| McCulloch Geothermal Corporation | Utah | 0 BBLs | 0 MCF | Mar 1957 - Jun 1982 |
| McCulloch Oil Corp Of Ca | Utah | 0 BBLs | 0 MCF | Feb 1973 - May 1980 |