 As of June 2015, it is the world's most valuable football brand, estimated to be worth $1.2 billion.After being floated on the London Stock Exchange in 1991, the club was purchased by Malcolm Glazer in May 2005 in a deal valuing the club at almost £800 million, after which the company was taken private again, before going public once more in August 2012, when they made an initial public offering on the New York Stock Exchange.Manchester United is one of the most widely supported football clubs in the world, and has rivalries with Liverpool, Manchester City, Arsenal and Leeds United.