Bloomberg Businessweek, previously known as BusinessWeek, is an American weekly business magazine published fifty times a year. Since 2009, the magazine is owned by New York City-based Bloomberg L.P. The magazine debuted in New York City in September 1929. Bloomberg Businessweek business magazines are located in the Bloomberg Tower, 731 Lexington Avenue, Manhattan in New York City and market magazines are located in the Citigroup Center, 153 East 53rd Street between Lexington and Third Avenue, Manhattan in New York City.

Bloomberg L.P. is a privately held financial, software, data, and media company headquartered in Midtown Manhattan, New York City. It was co-founded by Michael Bloomberg in 1981, with Thomas Secunda, Duncan MacMillan, Charles Zegar, and a 12% ownership investment by Bank of America through their brokerage subsidiary Merrill Lynch.