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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Skyline Oil Company | Wyoming | 0 BBLs | 0 MCF | Jun 1978 - Jan 1987 |
| Slaughter J M Oil Company | Wyoming | 0 BBLs | 0 MCF | Jul 1987 - Apr 1995 |
| Slawson Exploration Company Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 2019 |
| SM Energy Company | Wyoming | 0 BBLs | 0 MCF | Jul 2006 - Mar 2018 |
| Smith Al | Wyoming | 0 BBLs | 0 MCF | Jan 1984 - Dec 1993 |
| Smith Conley P Operating Co | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Jun 2000 |
| Smith Gene & George | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 1998 |
| Smith Kevin | Wyoming | 0 BBLs | 0 MCF | Sep 1987 - Sep 2024 |
| Smith Nowlin Jr Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1998 - May 2014 |
| Smith Red Plains Production LLC | Wyoming | 2,073 BBLs | 0 MCF | Dec 2022 - Jul 2025 |
| Smokey Gap Oil Company LLC | Wyoming | 238 BBLs | 0 MCF | Apr 2025 - Jul 2025 |
| Smokey Gap Ventures | Wyoming | 0 BBLs | 0 MCF | Apr 1982 - Jul 1997 |
| Smokey Oil Company Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1996 |
| Snowy Owl LLC | Wyoming | 7,620 BBLs | 0 MCF | Dec 2012 - Jul 2025 |
| Snyder Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Nov 1981 - Dec 1999 |
| Sois-Osage Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1996 - Oct 2006 |
| Solar Petroleum Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1980 - Dec 1980 |
| Sonat Exploration Co | Wyoming | 0 BBLs | 0 MCF | Jan 1983 - Oct 2000 |
| Sonoma Energy Corporation | Wyoming | 0 BBLs | 0 MCF | Dec 2000 - Feb 2010 |
| Sonterra Energy LLC | Wyoming | 0 BBLs | 0 MCF | Nov 1996 - Mar 2022 |
| Sooner Operating Co Inc | Wyoming | 189 BBLs | 0 MCF | Jun 2007 - Jul 2025 |
| Sourcegas Energy Services Co | Wyoming | 0 BBLs | 0 MCF | Feb 2009 - Jun 2015 |
| South Coast Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Mar 1987 - Dec 1993 |
| South Pass Petroleum Inc | Wyoming | 70 BBLs | 5,961 MCF | Sep 2018 - Jun 2025 |
| Southern Mineral Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Sep 1995 |
| Southern Oil LLC | Wyoming | 0 BBLs | 0 MCF | Aug 2013 - Jan 2017 |
| Southern States Petroleum Corp | Wyoming | 0 BBLs | 0 MCF | Mar 1981 - Dec 1982 |
| Southern Union Exploration | Wyoming | 0 BBLs | 0 MCF | Feb 1985 - Jan 1990 |
| Southland Royalty Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1995 |
| Southland Royalty Company LLC | Wyoming | 0 BBLs | 0 MCF | Jul 2016 - Jul 2021 |
| Southport Exploration Inc | Wyoming | 0 BBLs | 0 MCF | Jul 1981 - Jan 1986 |
| Southwest Drilling Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1983 - Jan 1992 |
| Southwestern Energy Prod Co | Wyoming | 0 BBLs | 0 MCF | Jan 1985 - Jul 1991 |
| Southwestern Production Corporation | Wyoming | 21,344 BBLs | 55,234 MCF | Jun 1999 - Jul 2025 |
| Speasfed Natural Resources LLC | Wyoming | 0 BBLs | 0 MCF | Oct 2016 - Sep 2018 |
| Speicher Jennie F | Wyoming | 0 BBLs | 0 MCF | Feb 1978 - Dec 1984 |
| Spellbound Energy LLC | Wyoming | 5,687 BBLs | 0 MCF | Jun 2018 - Jul 2025 |
| Spirit Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jun 1991 - Jun 1996 |
| Spring Valley Development Co LLC | Wyoming | 148 BBLs | 209 MCF | Mar 2013 - Jul 2025 |
| Spring Valley Oil & Gas | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Dec 1992 |
| Square S Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1993 - Oct 2009 |
| St Mary Operating Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1997 |
| St Michael Exploration | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jun 1987 |
| St Oil Company | Wyoming | 0 BBLs | 0 MCF | Oct 1994 - Dec 2010 |
| Stag Oil Producers Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 1998 |
| Stanco Petroleum Inc | Wyoming | 0 BBLs | 0 MCF | May 1989 - Jan 1995 |
| Standard Energy Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1989 - Sep 1998 |
| Stanley Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jul 1987 - Aug 2004 |
| Star Oil Operating Company LLC | Wyoming | 128 BBLs | 0 MCF | Jul 2021 - Jul 2025 |
| Star Resources LLC | Wyoming | 0 BBLs | 0 MCF | Oct 1998 - Nov 2005 |