In 2018, Bloomberg pledged $1.8 billion to Johns Hopkins University, his undergraduate alma mater, adding to $1.5 billion he had already given the school.
As a teenager, Bloomberg worked at an electronics company in Cambridge, Massachusetts.
Michael Bloomberg cofounded financial information and media company Bloomberg LP in 1981.
He put in the seed funding for the company and now owns 88% of the business, which has estimated revenues north of $12 billion.
Bloomberg got his start on Wall Street in 1966 with an entry level job at investment bank Salomon Brothers. He was fired 15 years later.
A major philanthropist, he has donated more than $14.4 billion to gun control, climate change and other causes.
He has committed to donating his stake in Bloomberg LP to Bloomberg Philanthropies when he dies, if not sooner.
Bloomberg served as mayor of New York City for 12 years, from 2002 to 2013, and launched an unsuccessful bid for president in the 2020 race.
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