What is Jim Clark's net worth? Jim Clark is a Texas-born billionaire businessman who has a net worth of $4.5 billion. Jim Clark is the founder of several notable tech companies including, Silicon Graphics Inc., Netscape Communications Corporation, Healtheon (which later merged with WebMD) and wealth management firm myCFO.James H. Clark was born on March 23, 1944, in Plainview, Texas. Havin...

Usain Bolt is the highest-earning sprinter of all-time. Yet thanks to one investment firm, he just lost a lot of cash.

Bolt says that there are millions of dollars missing from his investment accounts with Stocks and Securities Limited, and an investigation is now reportedly under way.

Palm Beach, Boca Raton, Bal Harbour, and other ritzy Miami enclaves regularly make the list of the most expensive zip codes in the U.S. It's no surprise then, that 22 billionaires call the Miami area home.