Michael Bloomberg, the richest billionaire in the media business, returned to his eponymous media company in September 2014, eight months after stepping down as mayor of New York City.
One notable sign of his influence on the publication: Michael Bloomberg doesn t appear on Bloomberg s Billionaires Index.
FORBES pegs his net worth at $45.7 billion.
Bloomberg cofounded his financial data company in 1981 with Charles Zegarand Thomas Secunda, both of whom are now billionaires as well thanks to their minority equity stakes in Bloomberg LP.
The company expanded into business news coverage and has more than 2,000 reporters around the world.
In 2009, Bloomberg LP bought Business Week magazine from McGraw Hill for a reported $5 million plus assumption of debt.