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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Mountain Petroleum LTD | Wyoming | 0 BBLs | 0 MCF | Jan 1985 - Aug 1987 |
| Mountain Resource Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1983 - Dec 1988 |
| Moxa Energy Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1981 - Apr 1981 |
| MRD Operating LLC (Delaware) | Wyoming | 0 BBLs | 0 MCF | Feb 2008 - Jul 2015 |
| Mtarri Inc | Wyoming | 0 BBLs | 0 MCF | Feb 2001 - Nov 2004 |
| MTG Operating Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1997 - Apr 2011 |
| Muddy Mineral Exploration LLC | Wyoming | 0 BBLs | 0 MCF | Apr 2009 - Jun 2017 |
| Mueller Fred W | Wyoming | 0 BBLs | 0 MCF | Jun 1979 - Dec 1995 |
| Mule West Oil LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2010 - Feb 2014 |
| Mull Drilling Company | Wyoming | 0 BBLs | 0 MCF | Dec 1994 - Nov 2008 |
| Mundell F E | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 1994 |
| Murex Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | Dec 2003 - Nov 2017 |
| Murphy D V | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1989 |
| Murphy Oil USA Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 1992 |
| Murphy Sheldon L & Loretta | Wyoming | 79 BBLs | 0 MCF | Jan 1986 - Aug 2026 |
| Mustang Oil & Gas Corporation | Wyoming | 0 BBLs | 0 MCF | Mar 1982 - Mar 1996 |
| Mustang Resources LLC | Wyoming | 439 BBLs | 147,315 MCF | Nov 2014 - Aug 2026 |
| MWJ Producing Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - May 1998 |
| Mystique Developments | Wyoming | 0 BBLs | 0 MCF | May 1983 - Dec 1997 |
| Nadel & Gussman Rockies LLC | Wyoming | 0 BBLs | 0 MCF | Jul 2005 - Jun 2012 |
| Nance Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | Jul 1999 - Nov 2007 |
| Nanke Energy LLC | Wyoming | 0 BBLs | 0 MCF | Apr 2017 - Jul 2026 |
| National Energy Group Inc | Wyoming | 0 BBLs | 0 MCF | Nov 1991 - Sep 1996 |
| National Fuel Corporation | Wyoming | 138 BBLs | 0 MCF | Apr 1992 - Jul 2026 |
| National Oil Company | Wyoming | 0 BBLs | 0 MCF | Jun 1980 - May 1990 |
| National Pride Operating | Wyoming | 0 BBLs | 0 MCF | Mar 1983 - Dec 2017 |
| National Treasure Mines | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1998 |
| Natomas North America Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - May 1984 |
| Natrona County Holdings LLC | Wyoming | 0 BBLs | 0 MCF | Apr 2001 - Nov 2020 |
| Natural Gas Corp Of California | Wyoming | 0 BBLs | 0 MCF | Jan 1981 - Dec 1989 |
| Natural Gas Processing Company | Wyoming | 2,086 BBLs | 6,383 MCF | Feb 1978 - Aug 2026 |
| Natural Resource Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1981 - Sep 1983 |
| Nautilus Exploration LLC | Wyoming | 0 BBLs | 0 MCF | Oct 2006 - Mar 2011 |
| Navigation Powder River LLC | Wyoming | 13,023 BBLs | 64,158 MCF | Dec 2016 - Aug 2026 |
| Nearburg Producing Company | Wyoming | 0 BBLs | 0 MCF | Mar 2002 - Mar 2004 |
| Nebeker Claude | Wyoming | 0 BBLs | 0 MCF | Jan 1984 - Dec 1986 |
| Nella Company LTD | Wyoming | 0 BBLs | 0 MCF | Jan 1983 - Dec 1986 |
| Nelsco Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jul 1986 |
| Nepeco | Wyoming | 0 BBLs | 0 MCF | Oct 1996 - Jun 2026 |
| Netz Joseph | Wyoming | 0 BBLs | 0 MCF | Jul 1991 - Dec 1991 |
| Nevdak Oil & Exploration | Wyoming | 0 BBLs | 0 MCF | Apr 1987 - Dec 1991 |
| New Energy Co LLC | Wyoming | 0 BBLs | 0 MCF | Jan 2002 - Nov 2009 |
| New Era Oil/Preferred Energy | Wyoming | 0 BBLs | 0 MCF | Jan 1980 - Sep 1993 |
| New Era Petroleum Inc | Wyoming | 980 BBLs | 0 MCF | Feb 2010 - Aug 2026 |
| New Horizon Resources LLC | Wyoming | 811 BBLs | 587 MCF | Jan 2022 - Jul 2026 |
| New Tech Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1989 - Aug 2006 |
| Neward Corporation | Wyoming | 0 BBLs | 0 MCF | Jul 1990 - Dec 1997 |
| Newcastle Oil & Gas Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1986 - Dec 1988 |
| Newfield Production Company | Wyoming | 0 BBLs | 0 MCF | Jul 2007 - Nov 2012 |
| Newman Bros Drilling | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Apr 2004 |