MICHAEL PHELPS—EST. $55 MILLION

Michael Phelps is the most outstanding all-round swimmer in the world. When he was 15 years old, Phelps rose up in the world. At that time, he became the youngest swimmer in the U.S. Olympic swimming team and won the fifth place in the 200 meter butterfly at the Sydney Olympic Games.

Michael Phelps is one of those rare gems in the sporting world. Indeed, there was a time when he seemed so utterly unbeatable that merely getting second place when he places first had already been considered a huge accomplishment. It’s no wonder many companies have gleefully parted with millions of dollars just to get him associated with their products, which is primarily what made Phelps as rich as he is. But Phelps net worth isn’t solely because of the many products he’s paid to endorse; the man’s got an investment portfolio as well, which includes a swimsuit company called MP.