Net Worth: $18 billion
Profession: Bloomberg is the current mayor of New York City and owner of Bloomberg L.P., a financial news and information services media company.
How He Got Rich: Bloomberg
Fast Facts: Bloomberg received an M.B.A from Harvard University, and he gave away around $1 billion to charities in the past five years. He’s divorced, has two kids, and he was a lifelong Democrat before he decided to run as a Republican during his 2001 election.