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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Lukowicz L J | Wyoming | 0 BBLs | 0 MCF | Jun 1983 - Mar 1991 |
| Lusk Operating LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2013 - Jun 2017 |
| Lyco Operating Company | Wyoming | 0 BBLs | 0 MCF | Jun 1995 - Dec 1997 |
| M & C Oil Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Jan 1999 |
| M & G Oil And Gas Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2009 - Apr 2023 |
| M & H Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1979 - Dec 1982 |
| M & K Oil Company LLC | Wyoming | 24,350 BBLs | 87,749 MCF | Jan 1978 - Mar 2024 |
| M & K Oil Operations | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Sep 1994 |
| M & L Oil | Wyoming | 0 BBLs | 0 MCF | Apr 1985 - Nov 2018 |
| M & T Incorporated | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 1980 |
| M & T Oil | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Dec 1987 |
| M G Production Co | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1999 |
| M K M Oil Company | Wyoming | 0 BBLs | 0 MCF | Aug 1981 - Jun 1996 |
| M W Petroleum Company | Wyoming | 0 BBLs | 0 MCF | Jan 1984 - Dec 1995 |
| M-3 Industries | Wyoming | 0 BBLs | 0 MCF | Jan 1986 - Mar 2024 |
| M2S Oil LLC | Wyoming | 373 BBLs | 0 MCF | Oct 2022 - Mar 2024 |
| Mack Energy Corporation | Wyoming | 0 BBLs | 0 MCF | May 2011 - Jun 2014 |
| Macpet | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1980 |
| Macquest Petroleum Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1979 - May 2008 |
| Macum Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jul 1991 - Aug 2021 |
| Maguire Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Sep 1991 |
| Maha Energy Us Inc | Wyoming | 0 BBLs | 0 MCF | May 2013 - Nov 2023 |
| Main Energy Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1989 - Oct 2004 |
| Majestic Petroleum Operations Inc | Wyoming | 0 BBLs | 0 MCF | Jun 2001 - Mar 2007 |
| Mak-J Energy Wyoming LLC | Wyoming | 0 BBLs | 0 MCF | Feb 2006 - Nov 2012 |
| Mallon Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Feb 2000 |
| Manewal Bradley Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 2013 |
| Manning R L | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jul 1983 |
| Manx Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Jun 2010 |
| Mapco Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 1985 |
| Mar/Reg Investments | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Jul 1999 |
| Marathon Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Nov 2016 |
| Markus Production | Wyoming | 79 BBLs | 15 MCF | Nov 1997 - Mar 2024 |
| Marlin Oil Company LLC | Wyoming | 0 BBLs | 0 MCF | Apr 1996 - Mar 2023 |
| Marmik Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 1994 |
| Marquis-Allred Eng Inc | Wyoming | 0 BBLs | 0 MCF | Mar 1981 - Apr 1992 |
| Marshall & Winston Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1986 - Jan 1995 |
| Martens & Peck Operating Co | Wyoming | 0 BBLs | 0 MCF | Dec 1994 - Feb 1997 |
| Martens & Peck Production Co | Wyoming | 0 BBLs | 0 MCF | Jul 1989 - Feb 1997 |
| Martha R Pace | Wyoming | 0 BBLs | 0 MCF | Jun 2002 - May 2012 |
| Martin Charles O | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Dec 1995 |
| Martin Exploration | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1993 |
| Masek Oil Company | Wyoming | 0 BBLs | 0 MCF | Apr 1984 - Jul 1992 |
| Materi Exploration Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1994 - Nov 2021 |
| Matrix Production Company | Wyoming | 25,754 BBLs | 20,523 MCF | Jan 1994 - Feb 2024 |
| Maxim Drilling & Expl Inc | Wyoming | 1,166 BBLs | 8,461 MCF | Jun 1982 - Mar 2024 |
| Maximus Operating LTD | Wyoming | 10,392 BBLs | 2,517 MCF | Jul 2014 - Mar 2024 |
| Mbi Oil & Gas LLC | Wyoming | 0 BBLs | 0 MCF | Jul 2014 - Nov 2014 |
| McAdams Roux & Associates | Wyoming | 0 BBLs | 0 MCF | Aug 1984 - Dec 1999 |
| McCartney Engineering LLC | Wyoming | 281 BBLs | 350 MCF | Apr 2001 - Mar 2024 |