14. PEGGY CHERNG

$2 billion  SOURCE: Fast food AGE: 73 • RESIDENCE: Las Vegas SELF-MADE SCORE:  Cherng and her husband, Andrew, founded Panda Express, their 2,200location fast food chain, in 1982 after immigrating to the U.S. from China. She and her husband are co-CEOs. Last year the couple donated $5 million to the University of Nevada, Las Vegas to establish the nation’s first academic program in fast-casual restaurant management.