Michael Rubens Bloomberg (born February 14, 1942) is an American businessman, politician, philanthropist, and author. He is the majority owner, co-founder and CEO of Bloomberg L.P. He was Mayor of New York City from 2002 to 2013, and was a candidate for the 2020 Democratic nomination for President of the United States. He has served as chair of the Defense Innovation Board, an independent advisory board that provides recommendations on artificial intelligence, software, data and digital modernization to the United States Department of Defense, since June 2022.