Pinnacle West Capital Corporation (PNW), headquartered in Phoenix, Arizona, provides retail and wholesale electric services. Valued at $10.5 billion by market cap, the company provides retail and wholesale electric service to most of the State of Arizona. PNW is also involved in real estate development activities in the western U.S. Companies worth$10 billion or more are generally described as “large-cap stocks,” and PNW perfectly fits that description, with its market cap exceeding this mark, underscor ...