The New York Stock Exchange (NYSE) is a stock exchange company based in New York City that is considered the largest equities-based exchange in the world, based on total market capitalization of its listed securities. Formerly run as a private organization, the NYSE became a public entity in 2005 following the acquisition of electronic trading exchange Archipelago. The parent company of the New York Stock Exchange is now called NYSE Euronext, following a merger with the European exchange in 2007; the NYSE Euronext was acquired by Intercontinental Exchange.
A series of mergers have given the New York Stock Exchange its massive size and global presence. The company started as NYSE before adding the American Stock Exchange and merging with the Euronext. The NYSE was purchased in an $11 billion deal by the Intercontinental Exchange in 2013.