Among them, I only know William Gates III (or Bill Gates
), Warren Buffett, Sergey Brin, Larry Page, Michael Dell and Michael Bloomberg. See the full list of the Forbes' Richest 400 Americans. Page and Brin the youngest ever to crack the top 10 on the list. Just a kind remind, even though ranked first for the 14th straight year , Microsoft's Gates is no longer the world's richest man; and Sergey Brin married to Anne Wojcicki this May.