In 2014, more than two-thirds of the people on the list made their own fortunes. By contrast, more than half were born into wealth just 20 years ago.
- Jan Koum, who sold WhatsApp to Facebook
- Travis Kalanick, the hard-charging CEO of ride sharing firm Uber
- Elizabeth Holmes, the CEO of Theranos, which aims to revolutionize consumers’ access to medical tests and information.
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