#10. Chelsea – Roman Abramovich – £5.3 billion
Few other owners on this list have had as much of an impact on their respective clubs as Roman Abramovich has. The Russian oligarch took over the club in 2003 and invested enough money to make the club one of the best in Europe. Chelsea went from being a club which hadn’t won the first division title for half a century to Premier League champions within two years of Abramovich’s ownership. Abramovich has invested big and won four Premier League titles, the Champions League and the Europa League since taking over.