315. Jay Paul
$2.6 billion Self-made Score: * Source: real estate age: 70 residence: san francisco B.S. Boston u. ’71 Known for his Silicon Valley real estate developments, Paul is set to open his first project in San Francisco in 2018, the 70-story 181 Fremont, with offices and 67 upper-floor luxury condos; in September Paul’s firm said that Facebook leased the entire office portion of the building, enough for 2,000 or more employees. Google, Apple, Amazon and Microsoft are some of the tech giants who rent space in his Silicon Valley office buildings.