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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Big Run Production Company | Colorado | 0 BBLs | 710 MCF | Jan 1999 - Feb 2026 |
| Bison IV Operating LLC | Colorado | 1,460,899 BBLs | 3,835,650 MCF | Jan 1999 - Mar 2026 |
| Black Hills Exploration And Production Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2004 |
| Black Hills Plateau Production LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2016 |
| Blackrock Energy Corp | Colorado | 343 BBLs | 1,128 MCF | Jan 1999 - Mar 2026 |
| Blue Chip Oil Inc | Colorado | 46 BBLs | 2,291 MCF | Jan 1999 - Mar 2026 |
| Blue Creek Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2002 |
| Bluebell Oil Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2002 |
| Bluestone Natural Resources II LLC | Colorado | 0 BBLs | 0 MCF | Jun 2011 - Mar 2017 |
| Bolet Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2003 |
| Bonanza Creek Energy Operating Company LLC | Colorado | 611,014 BBLs | 2,243,818 MCF | Jan 1999 - Feb 2026 |
| Booco'S Contract Services Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2021 |
| BP America Production Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2020 |
| Bright & Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2011 |
| Brooks Exploration Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2001 |
| Brown Oil & Gas LLC | Colorado | 918 BBLs | 0 MCF | Jan 1999 - Feb 2026 |
| Bta Oil Producers | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2003 |
| Btu Energy | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2008 |
| Buehler* Howard D & VIrginia A | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2013 |
| Burr Oil And Gas, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2003 |
| Byron Oil Industries Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2019 |
| C & J Field Services | Colorado | 79 BBLs | 0 MCF | Jan 1999 - Feb 2026 |
| Caerus Piceance LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2025 |
| Caerus Washco LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2015 |
| Calco Dba Callister Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2023 |
| Cannon Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2000 |
| Carmack Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2015 |
| Carrizo Niobrara LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2017 |
| Cascade Oil And Gas, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2005 |
| Cascade Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Feb 2013 - Aug 2015 |
| Catamount Energy Partners LLC | Colorado | 0 BBLs | 885,994 MCF | Jan 1999 - Mar 2026 |
| CDM Oil & Gas | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2017 |
| Cedar Ridge LLC | Colorado | 0 BBLs | 0 MCF | Nov 1999 - Oct 2005 |
| Ceh Operating LLC | Colorado | 63 BBLs | 388 MCF | Mar 2012 - Feb 2026 |
| Central Operating Inc | Colorado | 499 BBLs | 0 MCF | Jan 1999 - Mar 2026 |
| Chaco Energy Company | Colorado | 1,444 BBLs | 4,125 MCF | Jan 1999 - Feb 2026 |
| Chandler Creek Companies | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2010 |
| Chandler DJ Basin LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2007 |
| Charles P Dunning LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2025 |
| Chemco Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2023 |
| Chesapeake Operating LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2014 |
| Chevron Midcontinent LP | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2017 |
| Chevron USA Inc | Colorado | 735 BBLs | 230,579 MCF | Jan 1999 - Feb 2026 |
| Cholla Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Feb 2004 - Aug 2025 |
| Cholla Production LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2014 |
| Churchill Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2020 |
| Cig Resources Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2001 |
| Cinnamon Creek Oil & Gas Inc | Colorado | 190 BBLs | 0 MCF | Jan 1999 - Mar 2026 |
| Citation Oil & Gas Corp | Colorado | 13,188 BBLs | 111,083 MCF | Jan 1999 - Mar 2026 |
| City & County Of Denver | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2023 |