UniSource Energy Services

{{Short description|Electric and natural gas utility in Arizona, US}}

UniSource Energy Services is an electric and natural gas utility company serving Arizona in the United States. It is a subsidiary of Fortis.

W. B. Foshay Co., a predecessor of Citizens Communications, acquired Southern Arizona Power of Nogales and Desert Power and Water of Kingman in 1927.{{Cite news| pages = 16| title = Foshay Completes New Utilities Grouping| work = Miami Daily Arizona Silver Belt| location = Miami, Arizona| date = 1927-10-10|url=https://www.newspaperarchive.com/us/arizona/miami/miami-daily-arizona-silver-belt/1927/10-10/page-16/|url-access=subscription}}{{Cite news| pages = 4| last = AP| title = Fosheys Acquire Nogales Utility| work = Miami Daily Silver Belt| location = Miami, Arizona| date = 1927-03-07|url=https://www.newspaperarchive.com/us/arizona/miami/miami-daily-silver-belt/1927/03-07/page-4/|url-access=subscription}}

In 2003, UniSource Energy (later UNS) acquired Citizen's Arizona gas and electric operations in 2003 and renamed them UniSource Energy Services.[http://www.bizjournals.com/phoenix/stories/2003/08/11/daily15.html Citizens sells Arizona operations to UniSource Energy] In 2013, Fortis announced its acquisition of UNS.[https://dealbook.nytimes.com/2013/12/11/canadian-utility-buys-uns-energy-of-arizona-for-2-5-billion/ Canadian Utility Buys UNS Energy of Arizona for $2.5 Billion]