| KBR Consulting, Inc., Dissolved September 26, 2016Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | Corporation | Oct 28, 2005 | Voluntarily Dissolved |
| 160 Inverness, LLC, Colorado Authority Relinquished October 14, 2014Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Nov 18, 2005 | Withdrawn |
| Black Hills Service Company, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Dec 13, 2005 | Good Standing |
| Black Hills Plateau Production, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Dec 19, 2005 | Good Standing |
| Rockbrook Land Holding, LLC, Delinquent July 1, 2012Location not reported, CO · Delinquent | Location not reported, CO | LLC | Jan 17, 2006 | Delinquent |
| Black Hills Midstream, LLC, Colorado Authority Relinquished November 27, 2018Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Apr 7, 2006 | Withdrawn |
| ALVARADO PACIFIC, LLC, Colorado Authority Relinquished December 31, 2022Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Jul 27, 2006 | Withdrawn |
| Black Hills Gas Distribution, LLC, Colorado Authority Relinquished December 14, 2020Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Nov 28, 2006 | Withdrawn |
| Black Hills/Colorado Utility Company, LLC, Dissolved July 10, 2018Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Mar 23, 2007 | Voluntarily Dissolved |
| Black Hills/Colorado Utility Company II, LLC, Dissolved August 27, 2018Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Mar 23, 2007 | Voluntarily Dissolved |
| Black Hills Colorado Electric, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Mar 27, 2007 | Good Standing |
| Black Hills/Colorado Gas Utility Company, Inc.Location not reported, CO · Merged | Location not reported, CO | Corporation | Mar 27, 2007 | Merged |
| Johnstown, LLPLocation not reported, CO · Good Standing | Location not reported, CO | Partnership | Apr 13, 2007 | Good Standing |
| Midwest Properties Inc., Delinquent September 1, 2013Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Apr 23, 2007 | Delinquent |
| Saddleback Square, LLC, Colorado Authority Relinquished August 24, 2023Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Apr 24, 2007 | Withdrawn |
| Black Hills Gas, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | May 9, 2007 | Good Standing |
| Black Hills Gas, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 9, 2007 | Good Standing |
| Black Hills Gas Holdings, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | May 9, 2007 | Good Standing |
| 3345 N Cascade, LLC, Delinquent April 1, 2014Location not reported, CO · Delinquent | Location not reported, CO | LLC | Sep 4, 2007 | Delinquent |
| EVT Consulting Inc, Delinquent April 1, 2011Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Oct 20, 2007 | Delinquent |
| Ankarlo Management, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 6, 2008 | Good Standing |
| Black Hills Utility Holdings, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Aug 21, 2008 | Good Standing |
| 4 Front Kurtz Joint Venture, Colorado Authority Relinquished May 15, 2014Location not reported, CO · Withdrawn | Location not reported, CO | Other | May 22, 2009 | Withdrawn |
| Watt Properties, LLC, Delinquent November 1, 2013Location not reported, CO · Delinquent | Location not reported, CO | LLC | Jun 8, 2009 | Delinquent |
| Colorado Water Investment, LLC, Dissolved October 12, 2010Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Jun 26, 2009 | Voluntarily Dissolved |
| FortKnight Financial LLC, Dissolved June 24, 2022Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Jul 31, 2009 | Voluntarily Dissolved |
| Black Hills Colorado IPP, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Aug 25, 2009 | Good Standing |
| Generation Development Company, LLC, Colorado Authority Relinquished March 22, 2019Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Sep 23, 2009 | Withdrawn |
| ZTAI LLC, Dissolved October 4, 2019Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Oct 31, 2009 | Voluntarily Dissolved |
| Black Hills/Kansas Gas Utility Company, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Jan 25, 2010 | Good Standing |
| Dean Kurtz Construction Company, Inc., Colorado Authority Relinquished March 7, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Mar 17, 2010 | Withdrawn |
| Midwestern Mechanical Rapid, Inc., Colorado Authority Relinquished August 9, 2016Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jun 24, 2010 | Withdrawn |
| Samantha's Rentals, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Aug 9, 2010 | Good Standing |
| Vacation Rental, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Aug 9, 2010 | Good Standing |
| Ice Creek Properties, LLC, Dissolved November 26, 2013Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Sep 16, 2010 | Voluntarily Dissolved |
| Fuelade Technologies, LLC, Delinquent August 1, 2012Location not reported, CO · Delinquent | Location not reported, CO | LLC | Feb 1, 2011 | Delinquent |
| Brick Wall Fire Sprinkler, LLCLocation not reported, CO · Merged | Location not reported, CO | LLC | Feb 8, 2011 | Merged |
| Oran Jacobs Consulting Inc, Dissolved March 7, 2021Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | Corporation | Feb 27, 2011 | Voluntarily Dissolved |
| Jeff & Kristi Werner Investments, LLC, Delinquent October 1, 2022Location not reported, CO · Delinquent | Location not reported, CO | LLC | May 12, 2011 | Delinquent |
| CTC Engineering and Design Co., Colorado Authority Relinquished August 1, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Sep 28, 2011 | Withdrawn |
| Bonanza Records, LLC, Dissolved June 21, 2019Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Nov 11, 2011 | Voluntarily Dissolved |
| White Fields, LLC, Colorado Authority Relinquished May 6, 2020Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Dec 2, 2011 | Withdrawn |
| Black Hills Colorado Wind, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Dec 19, 2011 | Good Standing |
| Tenmile Resources, LLC, Delinquent August 1, 2014Location not reported, CO · Delinquent | Location not reported, CO | LLC | Mar 12, 2012 | Delinquent |
| K&S Communications, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 1, 2012 | Good Standing |
| A.W.A LLC, Delinquent June 1, 2025Location not reported, CO · Delinquent | Location not reported, CO | LLC | May 30, 2012 | Delinquent |
| Midco Diving & Marine Services, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Mar 5, 2013 | Good Standing |
| grant bolt roofing, Delinquent August 1, 2014Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Mar 18, 2013 | Delinquent |
| DC Gravel LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Jun 23, 2013 | Good Standing |
| Mountain to Coast Compliance Consulting, Dissolved January 7, 2020Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | LLC | Jan 21, 2014 | Voluntarily Dissolved |