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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Abilene Perfect Energy JV LLC | Colorado | 0 BBLs | 0 MCF | Aug 2015 - Aug 2018 |
| Aeon Energy Corp | Colorado | 0 BBLs | 0 MCF | Jun 2004 - Apr 2023 |
| Alamosa Drilling Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2023 |
| American Petroleum Energy Co | Colorado | 0 BBLs | 3,493 MCF | Jan 1999 - Apr 2023 |
| Amoco Production Co. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2002 |
| Anadarko E&P Onshore LLC | Colorado | 0 BBLs | 0 MCF | Jan 2001 - May 2018 |
| Andrikopoulos Resources* A G | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2015 |
| Anschutz Exploration Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2023 |
| Antelope Energy Company LLC | Colorado | 89 BBLs | 120 MCF | Jan 1999 - Apr 2023 |
| Apollo Operating LLC | Colorado | 0 BBLs | 0 MCF | Mar 2007 - Sep 2013 |
| Arch Oil & Gas LLC | Colorado | 41 BBLs | 0 MCF | Jul 2014 - May 2023 |
| Argali Exploration Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2022 |
| Argonex Company LLC | Colorado | 81 BBLs | 304 MCF | Jan 1999 - Apr 2023 |
| Ark Trust, Carol W Byrd Trustee | Colorado | 374 BBLs | 0 MCF | Jan 1999 - May 2023 |
| Armor Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Nov 2004 - Dec 2022 |
| Arp Production Company LLC | Colorado | 0 BBLs | 0 MCF | Feb 2014 - Oct 2018 |
| Atlas Resources LLC Dba Atlas Rockies LLC | Colorado | 0 BBLs | 0 MCF | Jan 2011 - Jun 2017 |
| Augustus Energy Resources LLC | Colorado | 0 BBLs | 0 MCF | Aug 2013 - Oct 2019 |
| Aurora Power Resources Inc | Colorado | 0 BBLs | 0 MCF | Feb 2014 - Aug 2018 |
| Aus-Tex Exploration Inc | Colorado | 27 BBLs | 10 MCF | Jun 2012 - May 2023 |
| Ausmus & Clark Oil | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2022 |
| Axia Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 2011 - Jun 2016 |
| 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 - Jun 2016 |
| Barrett Corporation* Bill | Colorado | 0 BBLs | 0 MCF | Mar 2002 - Mar 2023 |
| Bayhorse Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Nov 2007 - Dec 2016 |
| Bayless Producer LLC* Robert L | Colorado | 2,207 BBLs | 41,547 MCF | Jan 1999 - Apr 2023 |
| Bayswater Exploration And Production LLC | Colorado | 607,567 BBLs | 1,994,212 MCF | Jan 2008 - Apr 2023 |
| Beartooth Oil & Gas Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2018 |
| Becca Oil LLC | Colorado | 0 BBLs | 0 MCF | Mar 2006 - Sep 2018 |
| Beeman Oil & Gas LLC | Colorado | 2,405 BBLs | 8,785 MCF | Jan 1999 - May 2023 |
| Benchmark Energy LLC | Colorado | 0 BBLs | 0 MCF | Aug 2011 - Aug 2021 |
| Benson-Montin-Greer Drilling Corporation | Colorado | 0 BBLs | 0 MCF | Oct 2002 - Sep 2022 |
| Beren Corporation | Colorado | 2,382 BBLs | 0 MCF | Jan 1999 - Apr 2023 |
| Berenergy Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2016 |
| Berexco LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2023 |
| Berry Energy Inc*Walter | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2017 |
| Big Run Production Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2023 |
| Black Hills Exploration And Production Inc | Colorado | 0 BBLs | 0 MCF | Mar 2001 - May 2018 |
| Black Hills Plateau Production LLC | Colorado | 0 BBLs | 0 MCF | Feb 2005 - May 2018 |
| Black Raven Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 2007 - Jun 2017 |
| Blue Chip Oil Inc | Colorado | 288 BBLs | 3,219 MCF | Jan 1999 - Apr 2023 |
| Bonanza Creek Energy Operating Company LLC | Colorado | 602,331 BBLs | 1,923,138 MCF | Apr 1999 - Apr 2023 |
| Bopco LP | Colorado | 0 BBLs | 0 MCF | Sep 2005 - Oct 2018 |
| BP America Production Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2020 |
| BP Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2017 |
| Brown Oil & Gas LLC | Colorado | 997 BBLs | 9,799 MCF | Jan 1999 - Apr 2023 |
| Burlington Resources Oil & Gas LP | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2020 |
| Byron Oil Industries Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2019 |
| C & J Field Services | Colorado | 38 BBLs | 0 MCF | Sep 2003 - Apr 2023 |