Source of wealth: Kleiner Perkins Caufield & Byer
Industry: Technology
Net worth: $7.67 billion
John Doerr is the current chairman of Kleiner Perkins Caufield & Byers (KPCB), a venture capital firm. According to Forbes, "KPCB is one of Silicon Valley's most storied firms, having backed Amazon, AOL, Compaq, Electronic Arts, Google, Netscape and Twitter." Prior to KPCB, Doerr worked at Intel.