Moody’s Assigns Negative Outlook to the Insurance Financial Strength Ratings of Converium Ag and Converium Rueckversicherung (Deutschland) Ag as well as to the Subordinated Notes Guaranteed by Converium Ag

Moody's Investors Service announced today that it had assigned a negative outlook to the Baa1 insurance financial strength rating (IFSR) of Converium AG and the Baa1 IFSR of Converium Rueckversicherung (Deutschland) AG, as well as to the 8.25% subordinated notes due 2032 issued by Converium Finance SA and guaranteed by Converium AG.

Published on May 10, 2005

Moody's said that its rating action was taken following today's earnings announcement and as a result of the increased likelihood that Converium will take longer than expected to return to sustainable profitability. The rating agency pointed out that lackluster 2005 renewals, a high expense ratio, ongoing restructuring costs, and deteriorating prospects for the next renewals season as a result of weak operating performance are increasing negative pressure on the ratings.

Moody's further stated that the Baa1 IFSR is predicated on the Group breaking even in 2005. To the extent additional evidence emerges later in the year that this expectation is unlikely to be met, Moody's will contemplate taking downward rating action at that time.

Converium AG, based in Zurich, Switzerland, is the main operating company of Converium Holding AG, Zug, Switzerland. Converium Holding AG reported consolidated Gross Premiums Written of $3,840.9 million in 2004 and Shareholders' Equity of $1,580.8 million as of 31 March 2005.

A negative outlook was assigned to the following ratings:

Converium AG -- insurance financial strength rating of Baa1

Converium Rueckversicherung (Deutschland) AG - insurance financial strength rating of Baa1

$200 million 8.25% guaranteed subordinated notes due December 2032 (callable in 2007) issued by Converium Finance S.A., a wholly-owned subsidiary of Converium Holding AG -- subordinated debt rating of Ba1

London

Simon Harris

Managing Director

Financial Institutions Group

Moody's Investors Service Ltd.

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London

Timour Boudkeev

Vice President - Senior Analyst

Financial Institutions Group

Moody's Investors Service Ltd.