5/Tech 3: Larry Ellison
With an estimated $43 billion in his pocket, Larry Ellison takes the No. 5 spot on the worldwide list, and the No. 3 spot in America. Although famous for pioneering Oracle, where his shares are reportedly up more than 20 percent year-over-year, Ellison lately has been in the news for his extracurricular activities. Last year, he bought nearly the entire Hawaiian island of Lanai for a sum believed to be in excess of $500 million. More recently, he also purchased two homes in Malibu for a combined $55 million. It also has been widely speculated that Ellison will likely buy the Sacramento Kings as part of an effort to prevent the basketball team from moving to Seattle. His interest and investment in yacht racing is also widely known, particularly as it relates to the Americas Cup regatta, which will take place in the San Francisco Bay this year.