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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| King-Sherwood Oil | Montana | 0 BBLs | 0 MCF | Jan 1986 - Sep 2024 |
| Kipling Energy Incorporated | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jan 2011 |
| Kirkwood, W.C. | Montana | 0 BBLs | 0 MCF | Apr 1996 - Aug 2002 |
| Klabzuba Oil & Gas, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jul 2010 |
| Klein, Fred P. | Montana | 0 BBLs | 0 MCF | Apr 1996 - Apr 1997 |
| Knaup, Harry J. & Lucille | Montana | 0 BBLs | 0 MCF | Jan 1991 - Oct 2023 |
| Kodiak Oil & Gas (USA) Inc. | Montana | 0 BBLs | 0 MCF | Jul 2005 - Sep 2013 |
| Kraken Operating, LLC | Montana | 1,044,042 BBLs | 1,274,172 MCF | Sep 2013 - Oct 2024 |
| Kykuit Resources, LLC | Montana | 0 BBLs | 0 MCF | Feb 2009 - Mar 2021 |
| Lamamco Drilling Co. | Montana | 0 BBLs | 0 MCF | Jan 2005 - Mar 2008 |
| Lamarsa Corp. | Montana | 0 BBLs | 0 MCF | May 2010 - Sep 2024 |
| Lease Technicians, James S. Brandt Dba | Montana | 0 BBLs | 0 MCF | Jan 1993 - Mar 2013 |
| Legacy Reserves Operating LP | Montana | 1,717 BBLs | 19 MCF | Jun 2012 - Oct 2024 |
| Light Energy, Inc. | Montana | 0 BBLs | 0 MCF | Oct 1996 - Aug 1997 |
| Lindberg, Ralph J. Or Anna M. | Montana | 0 BBLs | 0 MCF | Apr 2005 - Apr 2005 |
| Linn Operating Inc. | Montana | 0 BBLs | 0 MCF | Mar 2008 - Jan 2015 |
| Lonewolf Operating, LLC | Montana | 0 BBLs | 0 MCF | Aug 2018 - Sep 2024 |
| Longshot Oil, LLC | Montana | 0 BBLs | 0 MCF | Nov 2010 - Jul 2018 |
| Lowrance Company, The | Montana | 0 BBLs | 0 MCF | Dec 1998 - May 2019 |
| Lowrance, Darrell A. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Aug 2007 |
| Luff Exploration Company | Montana | 0 BBLs | 0 MCF | Mar 1991 - Nov 2010 |
| Lyon, John J. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jun 2022 |
| M & K Oil Company | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 2024 |
| Mach Petroleum, Inc. | Montana | 0 BBLs | 0 MCF | Apr 1996 - Apr 1998 |
| Macum Energy Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jul 2021 |
| Main Energy, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Feb 2008 |
| Main Energy, Inc. | Montana | 0 BBLs | 0 MCF | Aug 1992 - Aug 2006 |
| Makoil, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Nov 2003 |
| Malone, Isabelle M. | Montana | 0 BBLs | 0 MCF | Apr 1996 - Oct 1996 |
| Manuel Corporation | Montana | 692 BBLs | 0 MCF | Oct 1998 - Oct 2024 |
| Marathon Oil Company | Montana | 0 BBLs | 0 MCF | Apr 2007 - Jun 2014 |
| Marnell Resources Inc. | Montana | 0 BBLs | 0 MCF | Feb 1991 - Dec 1998 |
| Mbi Oil And Gas, LLC | Montana | 0 BBLs | 0 MCF | Jun 2011 - Dec 2021 |
| McCarthy, Lawrence J. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Nov 2011 |
| McCullis Resources Co., Inc. | Montana | 0 BBLs | 335 MCF | May 1991 - Oct 2024 |
| McLoraine, Helen M. | Montana | 0 BBLs | 0 MCF | Sep 2000 - Jul 2001 |
| McMinn Operating Company | Montana | 0 BBLs | 0 MCF | Nov 2006 - Jul 2009 |
| McOil Montana One LLC | Montana | 0 BBLs | 0 MCF | Dec 2003 - Jul 2024 |
| McPhillips, Bernice | Montana | 0 BBLs | 0 MCF | Jan 2010 - Oct 2022 |
| McPhillips, R D | Montana | 0 BBLs | 0 MCF | May 1996 - Jan 2010 |
| MCR, LLC | Montana | 0 BBLs | 0 MCF | Oct 2003 - Jul 2024 |
| McRae & Henry LTD | Montana | 0 BBLs | 0 MCF | May 1996 - Mar 2021 |
| Medallion Petroleum, Inc. | Montana | 0 BBLs | 0 MCF | Dec 1995 - Jun 2007 |
| Mendell Energy Technologies, Inc. | Montana | 0 BBLs | 0 MCF | Jul 2001 - Aug 2008 |
| Mercury Exploration Co. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Oct 2000 |
| Merit Energy Company | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 2000 |
| Miami Oil Producers, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jul 1999 |
| Midway Energy, LLC | Montana | 2,307 BBLs | 0 MCF | Mar 2019 - Oct 2024 |
| Miller, Frank I. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jun 2024 |
| Miocene Oil & Gas LTD | Montana | 0 BBLs | 0 MCF | Oct 2001 - Dec 2003 |