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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Ranchers Exploration Partners LLC | Colorado | 0 BBLs | 0 MCF | May 2014 - Jan 2015 |
| Red Mesa Holdings/O&G LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2014 |
| Red Mountain Energy LLC | Colorado | 0 BBLs | 0 MCF | Jun 2005 - Sep 2017 |
| Red Mountain Resources LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2023 |
| Red River Ranch Holdings LLC | Colorado | 0 BBLs | 0 MCF | Oct 2003 - Jan 2015 |
| Red Willow Production Company | Colorado | 0 BBLs | 2,443,256 MCF | Jan 1999 - Jul 2026 |
| Renegade Oil & Gas Company LLC | Colorado | 1,827 BBLs | 6,655 MCF | Jan 1999 - Aug 2026 |
| Retamco Operating Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2026 |
| Rim Operating, Inc | Colorado | 150 BBLs | 17,526 MCF | Jan 1999 - Aug 2026 |
| Rio Mesa Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2022 |
| Ritchie Exploration Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2014 |
| Robertson* Dexter | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2018 |
| Rocket Petroleum Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2005 |
| Rockies Oil & Gas Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 1999 |
| Rosewood Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2019 |
| Roughhouse Oil & Gas LLC | Colorado | 24 BBLs | 306 MCF | Jan 1999 - Jun 2026 |
| Ruth* Ula Pearl | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2019 |
| RWL Enterprises | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2017 |
| S & D LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2022 |
| Saga Petroleum Limited Liability Co Of Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2015 |
| Samedan Oil Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2001 |
| Samotlor Petroleum Investments LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2000 |
| Samson Resources Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2016 |
| San Marco Petroleum Inc | Colorado | 80 BBLs | 0 MCF | Jan 1999 - Jun 2026 |
| Sand Hills Society | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2007 |
| Sandlin Oil Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2026 |
| Santa Fe Natural Resources Inc | Colorado | 0 BBLs | 0 MCF | Nov 2001 - Dec 2021 |
| Sawtooth Energy Partners LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2005 |
| Schmid Properties Inc | Colorado | 20 BBLs | 0 MCF | Jan 1999 - Jun 2026 |
| Schneider Energy Services Inc | Colorado | 213 BBLs | 152 MCF | Jan 1999 - Jun 2026 |
| Schreider & Company, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2023 |
| Schutz* Harold | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2009 |
| Schutz* Richard E | Colorado | 15 BBLs | 0 MCF | Jan 1999 - Aug 2026 |
| Scout Energy Management LLC | Colorado | 213,131 BBLs | 895 MCF | Jan 1999 - Aug 2026 |
| Seeley Oil Company LLC | Colorado | 4,434 BBLs | 6,272 MCF | Jan 1999 - Aug 2026 |
| Select Natural Gas LLC | Colorado | 0 BBLs | 0 MCF | Jul 2000 - Aug 2001 |
| Setex Oil & Gas Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2004 |
| SG Interests I LTD | Colorado | 33 BBLs | 604,267 MCF | Jan 1999 - Aug 2026 |
| Shawnee Oil Development Co Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Silver Mountain Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Simcoe LLC | Colorado | 0 BBLs | 7,081,877 MCF | Jan 1999 - Jul 2026 |
| Simmons, Inc.* D. J. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2020 |
| Slawson Exploration Company Inc | Colorado | 0 BBLs | 0 MCF | Jul 2010 - Apr 2013 |
| Smith Energy Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2024 |
| Smith Energy LLC | Colorado | 0 BBLs | 68,365 MCF | Jan 1999 - Aug 2026 |
| Smith Oil Properties Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2022 |
| Sonat Raton, L.L.C. | Colorado | 0 BBLs | 0 MCF | Jul 2000 - Jul 2000 |
| Sonterra Energy, L.L.C. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2022 |
| Southwestern Production Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2001 |
| Sovereign Operating Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2016 |