206. Rishi Shah
$3.6 billion * self-made score: source: Health care Media age: 31 residence: chicago dropout, northwestern Shah started what would become Outcome Health as a 20-year-old student at Northwestern, dropping out a year later to pursue the idea. Outcome claims it provides 231,000 health care professionals with tablets and screens with specialized ads and content for their offices and waiting rooms. It raised more than $500 million at a $5.6 billion valuation in May. Sources told Forbes that customers aren’t happy; Pfizer got a full $4 million refund for one ad campaign. Outcome insists that it provides “meaningful returns” and that the majority of its customers renew their deals. Still, it recently laid off dozens of employees, even as it announced plans to hire 2,000 more staffers.