3. Michael Bloomberg – $42.7 Billion
Photo: businessinsider
The former mayor of New York City for three consecutive terms is the extremely wealthy business icon, Michael Bloomberg. He has an estimated net worth over $42.7 billion thanks to the massive success of his global financial company, Bloomberg L.P., which also specializes in software and mass media. Bloomberg was so popular for his work as Mayor that he was asked to run for both the Governor of New York, as well as the President of the United States in 2008 and 2012, but he declined.