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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Levkulich Oil | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2009 |
| Lewis & Clark Exploration Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2005 |
| Lilis Energy Inc | Colorado | 0 BBLs | 0 MCF | Feb 2014 - Aug 2017 |
| Linde Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2021 |
| Linn Bros Oil & Gas Inc. | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2022 |
| Linn Operating LLC | Colorado | 0 BBLs | 0 MCF | Jun 2014 - Apr 2017 |
| Locin Oil Corporation | Colorado | 0 BBLs | 0 MCF | Jun 2000 - Jan 2024 |
| Loeb LLC* Herman L | Colorado | 1,510 BBLs | 7,882 MCF | Jan 1999 - Mar 2024 |
| Logos Operating LLC | Colorado | 0 BBLs | 256,550 MCF | Jul 2017 - Feb 2024 |
| Loloff Construction Inc | Colorado | 0 BBLs | 0 MCF | Mar 2015 - Apr 2016 |
| Lone Mountain Production Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2016 |
| Lone Pine Gas Inc | Colorado | 0 BBLs | 0 MCF | Sep 2002 - May 2013 |
| Longs Peak Resources LLC | Colorado | 0 BBLs | 0 MCF | Feb 2016 - Jan 2024 |
| Lorentz Oil & Gas LLC | Colorado | 0 BBLs | 0 MCF | Apr 2005 - Jan 2019 |
| Louis Dreyfus Nat Gas Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2001 |
| Lowry Exploration, Inc. | Colorado | 0 BBLs | 0 MCF | Oct 2001 - May 2005 |
| Ludwick* James L | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2004 |
| Luff Exploration Co | Colorado | 0 BBLs | 0 MCF | Mar 1999 - Aug 2001 |
| Lundvall Oil & Gas Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2023 |
| Lyco Energy Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2002 |
| Lyster Oil Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2020 |
| Lyster* Brandon L. | Colorado | 0 BBLs | 0 MCF | Jun 2002 - Aug 2005 |
| M E III Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2022 |
| Machii-Ross Petroleum Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2014 |
| Magpie Operating, Inc | Colorado | 17,361 BBLs | 102,006 MCF | Jan 1999 - Feb 2024 |
| Mak-J Energy Colorado LLC | Colorado | 0 BBLs | 0 MCF | Mar 2012 - Jun 2013 |
| Mallard Operating Company LLC | Colorado | 0 BBLs | 0 MCF | May 2000 - Feb 2002 |
| Mallon Oil Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2005 |
| Manzano LLC | Colorado | 0 BBLs | 0 MCF | Jan 2005 - Jun 2015 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2024 |
| Marathon Oil Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2017 |
| Markus Production, Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2021 |
| Markwest Resources Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2003 |
| Marty Brothers | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Nov 2006 |
| Mastorakos* D A | Colorado | 0 BBLs | 0 MCF | Jan 1999 - May 2019 |
| Matrix Energy LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2013 |
| Matrix Oil Corporation | Colorado | 0 BBLs | 0 MCF | May 2012 - Jan 2021 |
| Matrix Production Company | Colorado | 1,050 BBLs | 0 MCF | Jun 2004 - Feb 2024 |
| Maverick Oil Company | Colorado | 0 BBLs | 0 MCF | Aug 2002 - Oct 2005 |
| Mayer* Dorothy M | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Oct 2004 |
| McCartney Engineering LLC | Colorado | 0 BBLs | 0 MCF | Jun 2001 - Jan 2024 |
| McClane Energy Inc | Colorado | 0 BBLs | 0 MCF | Sep 2015 - Aug 2017 |
| McCoy Petroleum Corporation | Colorado | 325 BBLs | 0 MCF | Nov 2019 - Mar 2024 |
| McElvain Energy Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2019 |
| McLane Trust* Dixie | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2023 |
| McMurry Oil Company | Colorado | 0 BBLs | 0 MCF | Jan 2001 - Oct 2001 |
| McRae & Henry LTD | Colorado | 0 BBLs | 0 MCF | Mar 2006 - Mar 2015 |
| McWhinney Holding Company LLLP | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Mar 2021 |
| MDS Energy Development LLC | Colorado | 31,776 BBLs | 32,520 MCF | Nov 2022 - Feb 2024 |
| Medicine Bow Operating Company | Colorado | 0 BBLs | 0 MCF | Aug 2001 - Aug 2004 |