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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Southwestern Energy Production Co. | Montana | 0 BBLs | 0 MCF | Sep 2012 - Nov 2014 |
| Spectrum Energy, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Oct 2003 |
| Spoklie, Guy R. | Montana | 0 BBLs | 0 MCF | Jan 1993 - Mar 2001 |
| St. Mary Land & Exploration Company | Montana | 0 BBLs | 0 MCF | Apr 2005 - May 2010 |
| Staghorn Energy, LLC | Montana | 0 BBLs | 0 MCF | Sep 2000 - Mar 2005 |
| Stalking Horse Energy, LLC | Montana | 0 BBLs | 0 MCF | Jan 2022 - Jan 2025 |
| Stearns Oil Company LLC | Montana | 10 BBLs | 9 MCF | Mar 2022 - Feb 2025 |
| Stephens & Johnson Operating Company | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 2004 |
| Stephens Production Company, LLC | Montana | 0 BBLs | 0 MCF | Jun 2010 - Feb 2018 |
| Stephens, Autry C. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Oct 2001 |
| Stivers, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Mar 2003 |
| Stockman Oil, Inc. | Montana | 0 BBLs | 0 MCF | Dec 2009 - Sep 2014 |
| Stokes Excavation Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Feb 2003 |
| Stone Energy Corporation | Montana | 0 BBLs | 0 MCF | Apr 2005 - Mar 2011 |
| Stone Energy, LLC | Montana | 0 BBLs | 0 MCF | Feb 1994 - Jun 1997 |
| Storm Cat Energy (USA) Operating Corporation | Montana | 0 BBLs | 0 MCF | Dec 2011 - Jun 2017 |
| Stovall Oil Co | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 1996 |
| Stratex Oil And Gas, Inc. | Montana | 0 BBLs | 0 MCF | Mar 2012 - Jun 2016 |
| Strauser, William D. | Montana | 0 BBLs | 0 MCF | May 1996 - Apr 1997 |
| Striper Oil, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 1996 |
| Summer Night Oil Company, LLC | Montana | 0 BBLs | 0 MCF | Jan 2004 - Apr 2013 |
| Summit Gas Resources, Inc. | Montana | 0 BBLs | 0 MCF | Apr 2011 - Dec 2023 |
| Summit Resources, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - May 2012 |
| Sun Coulee, LLC | Montana | 1,042 BBLs | 0 MCF | May 2022 - Feb 2025 |
| Sunburst Exploration, Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jul 2000 |
| Synergy Offshore LLC | Montana | 0 BBLs | 0 MCF | Feb 2011 - Feb 2022 |
| T.W.O. (Taylor Well Operating) | Montana | 654 BBLs | 195 MCF | Aug 1991 - Feb 2025 |
| T2 Operating Corporation | Montana | 0 BBLs | 0 MCF | Jun 2024 - Jan 2025 |
| Tanglewood Oil & Gas, LLC | Montana | 0 BBLs | 0 MCF | Nov 2013 - Dec 2013 |
| Taqa USA, Inc. | Montana | 0 BBLs | 0 MCF | Jan 2009 - Dec 2019 |
| Targe Energy Exploration And Production, LLC | Montana | 0 BBLs | 0 MCF | Nov 2007 - Oct 2013 |
| Tca Operations, Ted Clark Dba | Montana | 0 BBLs | 0 MCF | Apr 1991 - Dec 2008 |
| Tempel Contracting, Inc. | Montana | 0 BBLs | 0 MCF | Nov 2010 - Jan 2025 |
| Tensas Delta Exploration Company, LLC | Montana | 0 BBLs | 0 MCF | Aug 2004 - Dec 2009 |
| Terrol Energy Incorporated | Montana | 0 BBLs | 0 MCF | Jan 1991 - Mar 1994 |
| Texaco Exploration And Production Inc. | Montana | 76 BBLs | 0 MCF | Jan 1991 - Feb 2025 |
| Texakoma Exploration & Production LLC | Montana | 13 BBLs | 0 MCF | Feb 2024 - Feb 2025 |
| Thomas Operating Co., Inc. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Aug 2008 |
| Thompson Oil Co. | Montana | 0 BBLs | 0 MCF | Jan 1991 - Apr 1996 |
| Three Forks Resources, LLC | Montana | 1,059 BBLs | 7,489 MCF | Sep 2008 - Feb 2025 |
| Timberline Petroleum Company | Montana | 0 BBLs | 0 MCF | Jan 1986 - Feb 1987 |
| Tipperary Oil & Gas Corporation | Montana | 0 BBLs | 0 MCF | Jan 1991 - Jul 2000 |
| TJ Industries Inc. | Montana | 0 BBLs | 0 MCF | Jun 1996 - Mar 1997 |
| TMR Exploration, Inc. | Montana | 0 BBLs | 0 MCF | Oct 2002 - Jul 2004 |
| TNT Oil, LLC | Montana | 0 BBLs | 0 MCF | Mar 2003 - Nov 2017 |
| Toi Operating | Montana | 0 BBLs | 0 MCF | Jan 1991 - Sep 2019 |
| Tomahawk Oil Company, Inc. | Montana | 2,895 BBLs | 0 MCF | Jan 1991 - Feb 2025 |
| Topaz Oil & Gas Inc | Montana | 0 BBLs | 0 MCF | Jan 1991 - Nov 2019 |
| Triangle USA Petroleum Corporation | Montana | 0 BBLs | 0 MCF | Jul 2014 - Jul 2021 |
| Trout, Kye Jr | Montana | 0 BBLs | 0 MCF | Dec 1998 - Apr 1999 |