Question: arizona public service (corporate headquarters) phoenix az

title: Arizona Public Service
text: In 1987 , AZP Group changed its name to Pinnacle West Capital Corporation , and began trading under the new ticker symbol PNW . The utility continued to operate as its principal subsidiary . By then Pinnacle 's long - term debt had grown to almost US $2.4 billion . Earnings had declined to US $260 million in 1986 , but were recovering by the end 1987 . However , the stock price reached an all - time peak that year , which was not surpassed for the next decade , as the company ran into troubles through the early 1990s . In 1986 , Pinnacle acquired MeraBank , a savings and loan . It grew to become Arizona 's largest thrift , with $6.5 billion in assets . However , the thrift was seized by federal regulators in January 1990 , due in part to the deterioration in prices in the Arizona real estate market .