P.F. Chang’s China Bistro Inc. is the nation’s largest Asian-themed casual-dining chain with more than 200 U.S. units and more than $899 million in U.S. systemwide sales. The Scottsdale, Ariz.-based company also operates the Pei Wei Asian Diner fast-casual chain. P.F. Chang’s went private in 2012 in a $1.1 billion deal with private-equity firm Centerbridge Partners.