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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| 1876 Resources LLC | Colorado | 35,068 BBLs | 502,962 MCF | Nov 2023 - Sep 2024 |
| 31 Operating | Colorado | 0 BBLs | 0 MCF | Nov 2017 - Jul 2022 |
| 4-H Operating Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2017 |
| 44 Canyon LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2006 |
| 8 North LLC | Colorado | 11 BBLs | 0 MCF | Jun 2015 - Sep 2024 |
| A J Oil Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2000 |
| Abilene Perfect Energy JV LLC | Colorado | 0 BBLs | 0 MCF | Aug 2015 - Mar 2018 |
| Abraxas Petroleum Corporation | Colorado | 0 BBLs | 0 MCF | Mar 2008 - Sep 2009 |
| Abundance Energy Services LLC | Colorado | 0 BBLs | 556,961 MCF | Feb 2024 - Sep 2024 |
| Aceite Energy Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2007 |
| Adams County | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2001 |
| Advanced Wireless Communications LLC | Colorado | 0 BBLs | 11,405 MCF | Oct 2019 - Oct 2024 |
| Advantage Resources, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2008 |
| Aec Oil & Gas (USA) Inc | Colorado | 0 BBLs | 0 MCF | Jan 2002 - May 2004 |
| Aeon Energy Corp | Colorado | 0 BBLs | 0 MCF | Jun 2004 - Sep 2024 |
| 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 |
| Allison Drilling Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 1999 |
| Alta Mesa Services LP | Colorado | 0 BBLs | 0 MCF | Jun 2016 - Jan 2018 |
| American Helium Operating LLC | Colorado | 0 BBLs | 0 MCF | Mar 2024 - Jul 2024 |
| American International Energy Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2003 |
| American Penn Energy | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2003 |
| American Petroleum Energy Co | Colorado | 0 BBLs | 3,176 MCF | Jan 1999 - Sep 2024 |
| Amkel Resources LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2003 |
| Amoco Production Co. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2002 |
| Anadarko E&P Onshore LLC | Colorado | 0 BBLs | 0 MCF | Oct 2002 - May 2018 |
| Anchor Bay Corporation | Colorado | 0 BBLs | 0 MCF | Jan 2000 - Feb 2006 |
| Andrikopoulos Resources* A G | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2015 |
| Anschutz Exploration Corp | Colorado | 3,858 BBLs | 20,651 MCF | Jan 1999 - Sep 2024 |
| Antara Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2000 |
| Antelope Energy Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2024 |
| Antero Resources Piceance LLC | Colorado | 0 BBLs | 0 MCF | Aug 2005 - Dec 2012 |
| Antler Energy LLC | Colorado | 1,066 BBLs | 7,602 MCF | Jun 2011 - Sep 2024 |
| Apache Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2005 |
| Apex Oil Ventures Inc | Colorado | 276 BBLs | 150 MCF | Jan 2016 - Sep 2024 |
| Apollo Operating LLC | Colorado | 0 BBLs | 0 MCF | Mar 2007 - Sep 2013 |
| Arch Oil & Gas LLC | Colorado | 0 BBLs | 0 MCF | Apr 2014 - Jul 2024 |
| Arco Permian, A Div Of Atlantic Richfield Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2001 |
| Argali Exploration Company | Colorado | 0 BBLs | 0 MCF | Jan 2000 - Aug 2024 |
| Argonex Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2024 |
| Aries Operating LLC | Colorado | 0 BBLs | 0 MCF | Aug 2002 - Feb 2010 |
| Ark Trust, Carol W Byrd Trustee | Colorado | 439 BBLs | 0 MCF | Jan 1999 - Oct 2024 |
| Arkoma Operations LLC | Colorado | 0 BBLs | 0 MCF | Apr 2021 - Jan 2024 |
| Armor Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Nov 2004 - Dec 2022 |
| Arp Production Company LLC | Colorado | 0 BBLs | 0 MCF | Aug 2013 - Sep 2018 |
| Aspen Operating LLC | Colorado | 0 BBLs | 0 MCF | Jul 2006 - Dec 2010 |
| Atg Enterprises Inc | Colorado | 0 BBLs | 0 MCF | Jun 2018 - Jun 2021 |
| Atlas Resources LLC Dba Atlas Rockies LLC | Colorado | 0 BBLs | 0 MCF | Jan 2011 - Jun 2017 |
| Atom Petroleum LLC | Colorado | 0 BBLs | 0 MCF | May 2012 - Jun 2016 |
| Auburn Operating Company LLC | Colorado | 0 BBLs | 0 MCF | Mar 2012 - May 2012 |