High Quality Content by WIKIPEDIA articles! Paul Gardner Allen (born January 21, 1953) is an American business magnate, investor, and philanthropist. Allen co-founded Microsoft with Bill Gates. He is also the 57th richest along with Viktor Vekselberg and Gerald Cavendish Grosvenor ( family) who all rank the same with an estimated wealth of $13 billion as of 2011. He is the founder and chairman of Vulcan Inc., which manages his business and philanthropic efforts. Allen also has a multi-billion dollar investment portfolio which includes technology companies such as Evri and Gist, real estate holdings, and stakes in other technology, media, and content companies. Allen also owns two professional sports teams, the Seattle Seahawks of the National Football League (NFL), and the Portland Trail Blazers of the National Basketball Association (NBA). He is also part-owner of the Seattle Sounders FC, which joined Major League Soccer (MLS) in 2009. Allen`s memoir Idea Man: A Memoir by the Cofounder of Microsoft was released on April 19, 2011.