18. SAFRA CATZ

$1.6 billion  SOURCE: Software AGE: 59 • RESIDENCE: Redwood City, CA SELF-MADE SCORE:  In 2020, Catz moved the headquarters of software giant Oracle from Redwood City, California, to Austin, Texas. The Israeli native has been sole CEO since 2019, having become co-CEO in 2014. Prior to Oracle, Catz covered the software industry on Wall Street for 14 years.