Manchester United was floated on the stock market in 1991,[18] and they received yet another takeover bid in 1998, this time from Rupert Murdoch's BSkyB Corporation.[19] The Manchester United board accepted a £623 million offer,[20] but the takeover was blocked by the Monopolies and Mergers Commission at the final hurdle in April 1999.[21] A few years later, a power struggle emerged between the club's manager, Sir Alex Ferguson, and his horse-racing partners, John Magnier and J. P. McManus, who had gradually become the largest shareholders via their company, Cubic Expression.[22] In a dispute that stemmed from contested ownership of the horse Rock of Gibraltar, Magnier and McManus attempted to have Ferguson removed from his position as manager, and the board responded by approaching investors to attempt to reduce the Irishmen's influence.[23]