20. EREN OZMEN
$1.4 billion SOURCE: Aerospace AGE: 62 • RESIDENCE: Reno, NV SELF-MADE SCORE: The Turkish immigrant co-owns aerospace and defense contractor Sierra Nevada Corp. with her husband, Fatih. Their Dream Chaser spacecraft has a contract with NASA for at least seven missions to deliver cargo to the International Space Station. In April, the Ozmens spun off their space operations into a stand-alone company, Sierra Space, with ambitions to build a new commercial space station in five years.