15. Peter Thiel, Yuri Milner, Jim Breyer, Mark Pincus

Facebook's earliest investors

These people scored big when Facebook went public. Peter Thiel, who manages Founders Fund, was the first outside investor in Facebook; he put in half a million in 2004. Yuri Milner is now worth $1.1 billion post-IPO. Mark Pincus, Zynga founder, is now worth around $1.3 billion. Jim Breyer, a partner at Accel, led the firm to invest $12.7 million in the company.