Zurich Cantonal Bank Increases its Holding of Converium's Registered Shares to 5.87 Percent

Disclosure of Shareholdings Pursuant to Art. 20 SESTA

| Source: Converium Holding AG Converium Holding AG

ZUG, Switzerland, Aug. 23, 2005 (PRIMEZONE) -- Converium Holding Ltd. has been notified that Zurich Cantonal Bank, Tessinerplatz 7, 8002 Zurich, Switzerland, increased its holding of registered shares of Converium Holding Ltd., Zug on August 18, 2005 to 5.87% or 8,613,148 registered shares with voting rights.

Zurich Cantonal Bank states that the above-mentioned stock of shares is a pure trading position, which is generated during the normal course of its derivative business. 



            








        

            

                

                    
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                                INTERNATIONAL
                            
                            
                                STOCK
                            
                            
                                SHARES
                            

                



        




    

        

        
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