Once upon a time there were seven. The members of the ultra-exclusive Groupement des Banques Privées in Geneva were Bordier, Darier, Ferrier Lullin, Hentsch, Lombard Odier, Mirabeau and Pictet.
Today you can still see their tastefully subdued advertisements as you pass through Geneva airport, but the numbers have shrunk. Darier merged with Hentsch. Ferrier Lullin was acquired by the old Swiss Bank Corporation, which is today's UBS.