He engineers sale of Union Bank of Switzerland to Swiss Bank.
He breaks up conglomerate Alusuisse-Lonza and sells Alusuisse to Alcan.
Declares he has built a 10% stake in Investor, the Wallenberg holding company, and demands it improve its performance.
Makes $2 billion for his firm by selling its 20% stake in pharmaceutical company Roche to arch-rival Novartis.
Builds up 20% stake in insurer Baloise.
Forces out ABB Chairman Percy Barnevik as part of a drive to restore the engineering giant's flagging performance.