Lisa Draexlmaier

Age: 30

Net worth: $1.8 billion

Citizenship: Germany

Source of wealth: Auto parts

Lisa and her father, Fritz Draexlmaier, preside over auto parts maker Fritz Draexlmaier Holding GmbH, of which Lisa is the sole owner. The company counts Audi, BMW, Cadillac, Land Rover, Maserati, MercedesBenz, Porsche, and Tesla among its customers. Subsidiaries worldwide are named after the late Lisa Draexlmaier, Lisa’s grandmother, who co-founded the Draexlmaier group. The conglomerate got its start in 1958 with an order for 50,000 wiring harnesses for the Goggomobil, a microcar produced by Hans Glas GmbH.