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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Nielson & Associates, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2006 |
| Nighthawk Production LLC | Colorado | 0 BBLs | 0 MCF | Feb 2012 - Jun 2018 |
| Niobrara Illuminating Gas Associates LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2009 |
| Noble Energy Inc | Colorado | 2,286,776 BBLs | 16,913,609 MCF | Jan 1997 - Feb 2025 |
| Noble Energy Production Inc | Colorado | 0 BBLs | 0 MCF | Jun 2005 - Dec 2010 |
| Noco Oil Company LLC | Colorado | 0 BBLs | 0 MCF | Nov 1999 - Jul 2002 |
| Nonsuch Natural Gas Inc | Colorado | 0 BBLs | 0 MCF | Jan 2006 - Jun 2024 |
| Norstar Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Oct 2002 - Apr 2015 |
| North American Resources Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2003 |
| North Shore Exploration And Production LLC | Colorado | 54 BBLs | 9,971 MCF | Jan 2019 - Feb 2025 |
| Northern Michigan Oil & Gas Corporation | Colorado | 0 BBLs | 0 MCF | Aug 2005 - May 2006 |
| Northstar Gas Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2016 |
| Nova Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 1999 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 602,723 MCF | Jul 2023 - Feb 2025 |
| Nylund* J. W. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2000 |
| O'Brien Energy Resources Corp | Colorado | 11 BBLs | 367 MCF | Jan 1999 - Feb 2025 |
| Oaks Resources Management Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 1999 |
| Ocean Energy Inc Ndba Devon Louisiana Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2001 |
| Ogris Operating LLC | Colorado | 0 BBLs | 579,695 MCF | Sep 2020 - Feb 2025 |
| Oilfield Operating Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2006 |
| Oilfield Salvage & Service Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2001 |
| Omimex Petroleum Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2022 |
| Oneok Resources Company | Colorado | 0 BBLs | 0 MCF | Jan 2003 - Jan 2003 |
| Organic Energy Company LLC | Colorado | 2,299 BBLs | 2,771 MCF | Nov 2020 - Mar 2025 |
| Orion Energy Partners LP | Colorado | 0 BBLs | 0 MCF | Oct 2006 - Oct 2024 |
| Orr Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 2007 - Nov 2012 |
| Orr Production Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 1999 |
| Outlaw Operating LTD | Colorado | 0 BBLs | 0 MCF | Oct 2013 - Jan 2016 |
| Overland Resources LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2019 |
| Own Resources Operating LLC | Colorado | 55 BBLs | 798,638 MCF | Jul 2018 - Feb 2025 |
| Oxbow Properties Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2024 |
| Oxy USA Inc | Colorado | 0 BBLs | 192,044 MCF | Jan 1999 - Feb 2025 |
| Oxy USA WTP LP | Colorado | 0 BBLs | 0 MCF | Jan 2001 - Feb 2016 |
| P & M Petroleum Management LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2021 |
| P O & G Operating LLC | Colorado | 0 BBLs | 0 MCF | May 2016 - Jan 2025 |
| Pablo Operating Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2018 |
| Padco LLC | Colorado | 1,008 BBLs | 0 MCF | Jan 1999 - Feb 2025 |
| Paine* Joseph J.C. Dba Paine Petroleum Company LLC | Colorado | 0 BBLs | 0 MCF | Dec 2009 - Aug 2020 |
| Painted Pegasus Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Sep 2018 - Jul 2024 |
| Paladin Energy Partners LLC | Colorado | 0 BBLs | 0 MCF | Feb 2001 - Dec 2006 |
| Pan American Petroleum Corp | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2008 |
| Pancanadian Energy Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 2002 - Dec 2004 |
| Pape Oilfield Service Inc | Colorado | 0 BBLs | 0 MCF | Jan 2001 - Jul 2018 |
| Par Pacific Holdings Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2015 |
| Park Energy Petroleum LLC | Colorado | 0 BBLs | 0 MCF | Sep 2005 - Mar 2023 |
| Patara Oil & Gas LLC | Colorado | 0 BBLs | 0 MCF | May 2010 - Nov 2015 |
| Patina Oil & Gas Corporation | Colorado | 0 BBLs | 0 MCF | Apr 1997 - Aug 2007 |
| PCR Operating LLC | Colorado | 0 BBLs | 0 MCF | May 2017 - Jul 2024 |
| PDC Energy Inc | Colorado | 2,098,078 BBLs | 22,558,942 MCF | Dec 1999 - Feb 2025 |
| Peacock Oil Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2004 |