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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Energy Quest II LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2019 |
| Energy Search Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2021 |
| Enervest Operating LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2013 |
| Enprop Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2013 |
| Entek GRB LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2021 |
| EOG Resources Inc | Colorado | 0 BBLs | 0 MCF | Jun 2001 - Jan 2026 |
| Ephphatha LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Epic Energy LLC | Colorado | 0 BBLs | 26,560 MCF | Jan 1999 - Nov 2025 |
| Evergreen Natural Resources LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Exco Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2006 |
| Extraction Oil & Gas LLC | Colorado | 619,894 BBLs | 4,986,905 MCF | Jan 1999 - Dec 2025 |
| Exxon Mobil Corporation | Colorado | 0 BBLs | 0 MCF | Aug 2007 - Jun 2008 |
| Fahey Oil & Gas | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2021 |
| Faulconer Inc* Vernon E | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2018 |
| Fees Jr And Son Oil & Gas* Walter S | Colorado | 6 BBLs | 5,874 MCF | Jan 1999 - Dec 2025 |
| Fidelity Exploration & Production Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2012 |
| Forestar Group Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2015 |
| Fortitude Exploration Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Foundation Energy Management LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2025 |
| Fountainhead Resources LTD | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2016 |
| Four Corners Energy LLC | Colorado | 0 BBLs | 0 MCF | Mar 1999 - Jun 2012 |
| Four Star Oil & Gas Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2017 |
| Fram Operating LLC | Colorado | 0 BBLs | 0 MCF | Oct 2002 - Dec 2018 |
| Francis Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 1999 |
| Freund Investments LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2004 |
| Fritz & Digman Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Fritzler Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Fulcrum Energy Operating LLC | Colorado | 56,647 BBLs | 142,659 MCF | Jul 2007 - Nov 2025 |
| Fundare Resources Operating Company LLC | Colorado | 134,472 BBLs | 453,256 MCF | Jan 1999 - Nov 2025 |
| Gadeco LLC | Colorado | 317 BBLs | 27 MCF | Jan 1999 - Dec 2025 |
| Genesis Gas & Oil Colorado LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2023 |
| Geomet Operating Company Inc | Colorado | 0 BBLs | 0 MCF | Jun 2003 - May 2012 |
| Geotech Production Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2011 |
| Gibson* J W | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 1999 |
| Gilbert-Stewart Operating LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Gils Hot Oil Service | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2022 |
| Glade* Chris Oil & Gas LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2019 |
| GMT Exploration Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Goodwin Energy Management LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2022 |
| Gordon Engineering Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Gould & Associates* Joseph B | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2002 |
| Grand Mesa Operating Co | Colorado | 2,494 BBLs | 94 MCF | Jan 1999 - Dec 2025 |
| Grand Valley Resources Inc | Colorado | 6 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Great Northern Gas Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2016 |
| Great Western Operating Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2020 |
| Greenleaf Environmental Services LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2016 |
| Griffin Management LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2010 |
| Grizzly Operating LLC | Colorado | 0 BBLs | 0 MCF | Mar 2014 - Dec 2024 |
| GRMR Oil & Gas LLC | Colorado | 1,436 BBLs | 1,268 MCF | Jan 1999 - Nov 2025 |
| Grynberg* Jack Dba Grynberg Petroleum Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2023 |