Michael Rubens Bloomberg is an American businessman and politician He is the majority owner and co-founder of Bloomberg L.P.. He was the mayor of New York City from 2002 to 2013, and was briefly a candidate in the 2020 Democratic presidential primaries (from November 24, 2019, to March 4, 2020).

Bloomberg grew up in Medford, Massachusetts, and graduated from Johns Hopkins University and Harvard Business School. He began his career at the securities brokerage Salomon Brothers before forming his own company in 1981. That company, Bloomberg L.P., is a financial information, software and media firm that is known for its Bloomberg Terminal. Bloomberg spent the next twenty years as its chairman and CEO. In 2020, Forbes ranked him as the sixteenth-richest person in the world, with an estimated net worth of $48 billion as of 7 April 2020 and as of 21 July 2020, Bloomberg ranked 8th in Forbes 400 with net worth $60.1 billion. Since signing The Giving Pledge, Bloomberg has given away $8.2 billion.

While attending Johns Hopkins he invented their mascot which is the blue jay.