Capital Group International Inc. acquires 5.75% in Converium registered shares -held and managed in various funds-.

Business Editors

ZUG, Switzerland--(BUSINESS WIRE)--Feb. 18, 2004

We hereby inform you that Capital Group International Inc., 333 South Hope Street, in Los Angeles, CA, 90071-1406, has acquired for its own account and on behalf of various of its international subsidiaries 2,298,540 registered shares in Converium Holding Ltd, Zug (NYSE:CHR)(SWX:CHR). This corresponds to 5.75% of Converium's registered shares. These shares were purchased for own account trading and asset management purposes by the various entities. None of these entities represented by Capital Group International Inc., individually holds shares of 5% or more of Converium's registered share capital.

Disclosed share holdings in Converium Holding Ltd, Zug

To-date the following interests have been previously notified to Converium Holding Ltd, Zug:

-- Fidelity International Limited ("Fidelity"), Hamilton/Bermuda:

9.87% (date of notification April 28, 2003)

-- Wellington Management Company ("Wellington"), LLP,

Boston/Massachusetts, U.S.A.: 7.68% (date of notification

January 11, 2002)

-- Capital Group International Inc., Los Angeles/California (date

of notifcation, February 16, 2004)

Fidelity is an investment advisor, which provides investment advisory and management services to a number of non-U.S. investment companies or instrument trusts and certain institutional investors. Only one shareholder, a fund managed by Fidelity International Limited (European Growth SICAV Luxembourg: 6.01%), is registered in Converium's share register with an individual shareholding exceeding the 5% threshold.

Wellington is an investment advisor and portfolio manager having voting authority for 47 investment advisory clients, none of which has an individual shareholding in excess of 5%.

Capital Group International Inc. is a parent holding company of a group of investment management companies, which provides investment advisory and management services for their respective clients, including registered investment companies and institutional accounts.