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It may be an understatement to say that a lot has happened since Paul Bonavia became chief executive of UNS Energy Corp. and its main subsidia…

Paul J. Bonavia, chairman and CEO of UNS Energy Corp. since 2009, will retire as CEO on May 2 and take a new role as executive board chair of …

Higher rates at Tucson Electric Power Co. helped parent UNS Energy Corp. post an 80 percent increase in fourth-quarter profit and a 40 percent…

UNS Energy Corp., the parent of Tucson Electric Power Co., has agreed to be acquired by Canada-based utility Fortis Inc. in a deal worth $4.3 …

UNS Energy Corp., the parent of Tucson Electric Power Co., has agreed to be acquired by Canada-based utility Fortis Inc. in a deal worth $4.3 …

  • By David Wichner Arizona Daily Star

Tucson Electric Power Co. parent UNS Energy Corp. beat analysts’ third-quarter earnings expectations thanks in part to a recent rate increase,…

Tucson Electric Power Co. is swapping a chunk of its coal-fired power generation for cleaner-burning natural gas.

  • Arizona Daily Star Arizona Daily Star

Tucson-based UNS Energy Corp. posted a higher second-quarter profit but missed Wall Street revenue estimates as sales slipped at subsidiary Tu…

  • Arizona Daily Star

Tucson-based UNS Energy Corp. posted higher first-quarter earnings today as cold weather boosted energy demand.

  • Arizona Daily Star

Tucson-based UNS Energy Corp. today reported lower fourth-quarter profits but beat analysts’ estimates for income and revenues.