| Animas Well Services, LLC, Delinquent January 1, 2008Location not reported, CO · Delinquent | Location not reported, CO | LLC | Jul 6, 2005 | Delinquent |
| Red River Energy, Inc., Delinquent November 1, 2007Location not reported, CO · Delinquent | Location not reported, CO | Corporation | May 1, 2006 | Delinquent |
| Auburn Operating Company, LLC, Delinquent June 1, 2022Location not reported, CO · Delinquent | Location not reported, CO | LLC | Aug 17, 2011 | Delinquent |
| Chama Oil & Minerals LLC, Dissolved August 24, 2023Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | May 1, 2012 | Voluntarily Dissolved |
| Sierra Engineering LLC, Delinquent July 1, 2022Location not reported, CO · Delinquent | Location not reported, CO | LLC | Feb 6, 2013 | Delinquent |
| Sierra Petroleum Services LLC, Delinquent July 1, 2022Location not reported, CO · Delinquent | Location not reported, CO | LLC | Feb 6, 2013 | Delinquent |
| Flint Land and Exploration LLC, Dissolved January 10, 2014Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Dec 10, 2013 | Voluntarily Dissolved |
| Fisher Land and Minerals LLC, Dissolved May 11, 2015Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Jan 10, 2014 | Voluntarily Dissolved |
| Sierra Hamilton LLC, Delinquent February 1, 2023Location not reported, CO · Delinquent | Location not reported, CO | LLC | Sep 4, 2014 | Delinquent |
| RG Exploration LLC, Dissolved August 24, 2023Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Apr 6, 2015 | Voluntarily Dissolved |
| PEI-TEX Holdings, LLC, Dissolved December 12, 2024Denver, CO · Voluntarily Dissolved | Denver, CO | LLC | Mar 31, 2019 | Voluntarily Dissolved |