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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| 1876 Resources LLC | Colorado | 0 BBLs | 0 MCF | Jun 2016 - Dec 2025 |
| 31 Operating | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2022 |
| 4-H Operating Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2017 |
| 8 North LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Abilene Perfect Energy JV LLC | Colorado | 0 BBLs | 0 MCF | Sep 2003 - Dec 2017 |
| Abundance Energy Services LLC | Colorado | 0 BBLs | 536,462 MCF | Jan 1999 - Nov 2025 |
| Advanced Wireless Communications LLC | Colorado | 0 BBLs | 0 MCF | Apr 2006 - Jan 2026 |
| Advantage Resources, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2008 |
| Aeon Energy Corp | Colorado | 0 BBLs | 6 MCF | Jun 2004 - Dec 2025 |
| Alamosa Drilling Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2024 |
| Alan Howard Karchmer Living Trust | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2022 |
| Alta Mesa Services LP | Colorado | 0 BBLs | 0 MCF | Nov 2012 - Jan 2018 |
| American Helium LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2025 |
| American Petroleum Energy Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Anadarko E&P Onshore LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2018 |
| Andrikopoulos Resources* A G | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2015 |
| Anschutz Exploration Corp | Colorado | 22,643 BBLs | 108,648 MCF | Jan 1999 - Nov 2025 |
| Antelope Energy Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2024 |
| Antler Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2025 |
| Apex Oil Ventures Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2025 |
| Arch Oil & Gas LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Argali Exploration Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Argonex Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2024 |
| Ark Trust, Carol W Byrd Trustee | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Armor Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2022 |
| Atom Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2016 |
| Augustus Energy Resources LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2015 |
| Aurora Power Resources Inc | Colorado | 0 BBLs | 0 MCF | Feb 2014 - Aug 2018 |
| Aus-Tex Exploration Inc | Colorado | 0 BBLs | 0 MCF | Jun 2012 - Dec 2025 |
| Ausmus & Clark Oil | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2022 |
| Axis Exploration LLC | Colorado | 21,488 BBLs | 83,246 MCF | Jan 1999 - Dec 2025 |
| B & B Oil Company LTD | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2020 |
| Baney Well Service Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2004 |
| Barrett Corporation* Bill | Colorado | 179,002 BBLs | 1,029,472 MCF | Jan 1999 - Dec 2025 |
| Bataa Oil Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2002 |
| Bates* James Edward | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2017 |
| Bayhorse Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Nov 2007 - Apr 2015 |
| Bayless Producer LLC* Robert L | Colorado | 1,473 BBLs | 36,156 MCF | Jan 1999 - Dec 2025 |
| Bayswater Exploration And Production LLC | Colorado | 241,062 BBLs | 723,765 MCF | Jan 1999 - Dec 2025 |
| Beartooth Oil & Gas Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2013 |
| Becca Oil LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2018 |
| Beeman Oil & Gas LLC | Colorado | 0 BBLs | 9,367 MCF | Jan 1999 - Dec 2025 |
| Behrens Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2019 |
| Benchmark Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2023 |
| Benson-Montin-Greer Drilling Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2022 |
| Beren Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Berenergy Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2016 |
| Berexco LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Berry Energy Inc*Walter | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2016 |
| Berry Petroleum Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2009 |