Warren Buffett $7 billions
Buffett has 38% stocks of company Berkshire Hathaway. He is also business magnate, investor and philanthropist. On Forbes list he is richest man in the world. Warren was born in August 30, 1930. His company made this year 20% increase in price of its shares.
Charles Koch $6 billions
Charles Koch was born November 1, 1935. He is an American businessman and philanthropist and with 42% stocks co-owner of Koch industries. A rise in revenues for his chemical and Georgia Pacific properties greatly increased his net worth in $6 billion.