14. (250) Ingrid Wu, $6.61 billion
Wu, 69, co-founded AAC Technologies Holdings, a mobile phone component maker with revenue of $2.3 billion in 2016, with her husband Pan Zhengmin in 1993, according to Bloomberg News. She served as chief financial officer of the Shenzhen-based company, which builds miniaturized speakers and receivers for clients including Apple and Samsung, according to Bloomberg.