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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Ranch Oil Company | Wyoming | 1,697 BBLs | 0 MCF | Jan 1986 - Feb 2026 |
| Ranch Resources LLC | Wyoming | 0 BBLs | 0 MCF | Aug 2019 - Nov 2019 |
| Ranck Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1997 - Jul 2001 |
| Randolph Rex L Oil Properties | Wyoming | 0 BBLs | 0 MCF | Jan 2001 - Jan 2001 |
| Ranger Holdings Co | Wyoming | 0 BBLs | 0 MCF | Mar 1983 - Jul 1993 |
| Rangeview Resources Operating Co | Wyoming | 10,710 BBLs | 865,486 MCF | Jul 2022 - Jan 2026 |
| Rathbun Roger | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Dec 1993 |
| Rathpro Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Feb 1994 |
| Rawhide Western Inc | Wyoming | 0 BBLs | 0 MCF | May 1992 - Dec 2007 |
| RB Operating Company | Wyoming | 0 BBLs | 0 MCF | May 1989 - Feb 1997 |
| RBJ Oil LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2009 - Apr 2021 |
| RDG Oil & Gas LLC | Wyoming | 0 BBLs | 0 MCF | Jan 2006 - Mar 2017 |
| Reading & Bates Petroleum | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Apr 1989 |
| Ready Roger | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1979 |
| Red Bluff Energy LLC | Wyoming | 0 BBLs | 0 MCF | May 2009 - Oct 2021 |
| Red Eagle Resources Corp | Wyoming | 0 BBLs | 0 MCF | Jul 1996 - Dec 1996 |
| Red River Oil & Gas LLC | Wyoming | 0 BBLs | 0 MCF | Feb 2014 - Feb 2025 |
| Red Rock Resources Corporation | Wyoming | 0 BBLs | 0 MCF | Feb 2026 - Feb 2026 |
| Red Tiger Oil & Gas LLC | Wyoming | 16,898 BBLs | 0 MCF | Sep 2018 - Jan 2026 |
| Redbud E&P Inc | Wyoming | 0 BBLs | 0 MCF | Jan 2014 - Aug 2019 |
| Redstone Gas Partners LLC | Wyoming | 0 BBLs | 0 MCF | Mar 1999 - Mar 2001 |
| Redstone Resources Inc | Wyoming | 0 BBLs | 0 MCF | Nov 1995 - Dec 2010 |
| Reef Exploration Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1999 - Oct 2005 |
| Reg'S Well Service Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Feb 1991 |
| Reliable Oil & Gas Inc | Wyoming | 0 BBLs | 0 MCF | Jan 2016 - Oct 2025 |
| Reliance Resources Inc | Wyoming | 0 BBLs | 0 MCF | Oct 2005 - Jun 2012 |
| Relmco Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1984 - Dec 1987 |
| Remuda Energy Development LLC | Wyoming | 0 BBLs | 0 MCF | Nov 2004 - Oct 2025 |
| Rendezvous Resources Corporation | Wyoming | 0 BBLs | 0 MCF | May 1999 - Jun 2007 |
| Renor Exploration | Wyoming | 0 BBLs | 0 MCF | Jan 1997 - Feb 2001 |
| Renos Land & Minerals Company | Wyoming | 0 BBLs | 0 MCF | Feb 2016 - Oct 2021 |
| Republic Natural Gas Company | Wyoming | 0 BBLs | 0 MCF | Apr 1978 - Aug 1978 |
| Reserve Oil & Gas Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jul 1981 |
| Reserve Operating Corporation | Wyoming | 0 BBLs | 0 MCF | Sep 1988 - Apr 2001 |
| Resolute Wyoming Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2004 - May 2017 |
| Resource Enterprises Inc | Wyoming | 0 BBLs | 0 MCF | Nov 1989 - Dec 1990 |
| Resource Technology Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Aug 1996 |
| Resources Investment Corp | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1986 |
| Reunion Energy Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1993 |
| Rex Energy Rockies LLC | Wyoming | 0 BBLs | 0 MCF | Oct 2010 - May 2013 |
| Rex Fuller Company | Wyoming | 0 BBLs | 0 MCF | Feb 1987 - Dec 1995 |
| Riata Energy Inc | Wyoming | 0 BBLs | 0 MCF | Apr 1995 - Jul 2003 |
| Richard Bryan FLLC | Wyoming | 0 BBLs | 0 MCF | May 2005 - May 2021 |
| Richardson Oil Company | Wyoming | 0 BBLs | 0 MCF | Jun 1991 - May 1993 |
| Richardson Operating Co | Wyoming | 8,191 BBLs | 29,898 MCF | Jan 1982 - Jan 2026 |
| Ridge Energy Partners LLC | Wyoming | 0 BBLs | 0 MCF | Feb 2016 - Dec 2018 |
| Ridgeland Wyoming Inc | Wyoming | 0 BBLs | 0 MCF | Nov 2006 - Dec 2014 |
| Rim Operating Inc | Wyoming | 7,848 BBLs | 385 MCF | Jan 1988 - Feb 2026 |
| Rio Blanco Energy Inc | Wyoming | 0 BBLs | 0 MCF | Apr 1988 - Sep 1997 |
| River City Resources Inc | Wyoming | 0 BBLs | 0 MCF | May 1990 - Sep 1996 |