Pinnacle West Capital Corp. is a leading utilities company based in the United States. The company has a medium risk ESG score of 25.8. Pinnacle West's main subsidiary, Arizona Public Service, provides electricity to 1.4 million customers in central Arizona, including Phoenix. With over 6 gigawatts of power generation capacity, including a stake in the largest nuclear plant in the US, Palo Verde, the company is committed to sustainability with half of its energy coming from clean sources such as nuclear.