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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549


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                                 Schedule 14D-9

                   SOLICITATION/RECOMMENDATION STATEMENT UNDER
             SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934


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                              CONVERIUM HOLDING AG
                            (Name of Subject Company)

                              CONVERIUM HOLDING AG
                        (Name of Person Filing Statement)

                Registered Shares, Nominal Value CHF 5 Per Share
 American Depositary Shares, each representing one half of one Registered Share
                         (Title of Class of Securities)

                               Registered Shares*
                  American Depository Shares (CUSIP: 21248N107)
                      (CUSIP Number of Class of Securities)


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                               Christian Felderer
                              Converium Holding AG
                                 Dammstrasse 19
                                   CH-6301 Zug
                                   Switzerland
                                 +41 44 639 9335
 (Name, Address and Telephone Number of Person Authorized to Receive Notice and
            Communications on Behalf of the Person Filing Statement)

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                                 With copies to:
                           Gregory B. Astrachan, Esq.
                          Willkie Farr & Gallagher LLP
                                  1 Angel Court
                                 London EC2R 7HJ
                                     England
                                +44 207 696 5454
     *There is no CUSIP Number assigned to the Registered Shares.

[X] Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

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News release
Converium Holding Ltd, Zug


Zug, Switzerland - March 1, 2007 - Converium upgraded to "A-" by Standard &
Poor's.

Converium announces that Standard & Poor's has raised the Company's long-term
financial strength rating to "A-" ("strong") with a stable outlook. According to
Standard & Poor's the ratings decision reflects the Group's strengthened
management team and sound infrastructure, strong competitive position, and
strong capitalization.

Markus Dennler, Chairman of Converium's Board of Directors, commented: "The
restoration of our A-rating marks the full completion of Converium's turnaround.
We thank our shareholders, clients and employees for their support and loyalty
throughout challenging times in which Converium was able to demonstrate a
uniquely strong and intact client franchise."

Inga Beale, CEO of Converium, added: "Based on our strong 2006 financial results
and our robust franchise, we are now well positioned to capture growth
opportunities arising from the upgrade throughout 2007, whilst strictly
maintaining our focus on underwriting discipline. Converium has seen a strong
support from existing clients during the important January 1, 2007 renewals. We
will do everything to ensure that our clients' trust will continue to be
rewarded."

Enquiries

Beat W. Werder                                 Marco Circelli

Head of Public Relations                       Head of Investor Relations
beat.werder@converium.com                      marco.circelli@converium.com
Phone:     +41 (0) 44 639 90 22                Phone:     +41 (0) 44 639 91 31
Fax:       +41 (0) 44 639 70 22                Fax:       +41 (0) 44 639 71 31


Dr. Kai-Uwe Schanz                             Inken Ehrich

Chief Communication & Corporate Development    Investor Relations Specialist
Officer                                        inken.ehrich@converium.com
kai-uwe.schanz@converium.com                   Phone:     +41 (0) 44 639 90 94
Phone:     +41 (0) 44 639 90 35                Fax:       +41 (0) 44 639 70 94
Fax:       +41 (0) 44 639 70 35


About Converium

Converium is an independent international multi-line reinsurer known for its
innovation, professionalism and service. Today Converium employs about 500
people in 15 offices around the globe and is organized into three business
segments: Standard Property & Casualty Reinsurance, Specialty Lines and Life &
Health Reinsurance. Converium has an "A-" ("strong") financial strength rating
with a stable outlook from Standard & Poor's and a "B++" financial strength
rating (outlook positive) from A.M. Best Company.


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Important Disclaimers


This document contains forward-looking statements as defined in the U.S. Private
Securities Litigation Reform Act of 1995. It contains forward-looking statements
and information relating to the Company's financial condition, results of
operations, business, strategy and plans, based on currently available
information. These statements are often, but not always, made through the use of
words or phrases such as `seek to', `expects', `aims' `should continue',
`believes', `anticipates', `estimates' and `intends'. The specific
forward-looking statements cover, among other matters, our combined ratio,
return on equity and premium volume and expense reduction targets, our plans to
use capital more efficiently and to return capital to shareholders, the
reinsurance market, the Company's operating results, the Company's dividend
policy, our ability to obtain an upgrade of our financial strength rating and
the consequences of such an upgrade, the prospects for improving our results,
investment yield and market share. Such statements are inherently subject to
certain risks and uncertainties. Actual future results and trends could differ
materially from those set forth in such statements due to various factors. Such
factors include whether we are able to secure an upgrade of our financial
strength ratings; our ability to refinance our outstanding indebtedness and
increase our use of hybrid capital; uncertainties of assumptions used in our
reserving process; risk associated with implementing our business strategies and
our capital improvement measures; cyclicality of the reinsurance industry; the
occurrence of natural and man-made catastrophic events with a frequency or
severity exceeding our estimates; acts of terrorism and acts of war; changes in
economic conditions, including interest and currency rate conditions that could
affect our investment portfolio; actions of competitors, including industry
consolidation and development of competing financial products; a decrease in the
level of demand for our reinsurance or increased competition in our industries
or markets; our ability to expand into emerging markets; our ability to enter
into strategic investment partnerships; a loss of our key employees or executive
officers without suitable replacements being recruited within a suitable period
of time; our ability to address material weaknesses we have identified in our
internal control environment; political risks in the countries in which we
operate or in which we reinsure risks; the passage of additional legislation or
the promulgation of new regulation in a jurisdiction in which we or our clients
operate or where our subsidiaries are organized; the effect on us and the
insurance industry as a result of the investigations being carried out by the US
Securities and Exchange Commission, New York's Attorney General and other
governmental authorities; our ability to regain past customers following any
rating upgrades and the resolution of the investigations being carried out by
the US Securities and Exchange Commission, New York's Attorney General and other
governmental authorities; changes in our investment results due to the changed
composition of our invested assets or changes in our investment policy; failure
of our retrocessional reinsurers to honor their obligations or changes in the
credit worthiness of our reinsurers; our failure to prevail in any current or
future arbitration or litigation; and extraordinary events affecting our
clients, such as bankruptcies and liquidations, and other risks and
uncertainties, including those detailed in the Company's filings with the U.S.
Securities and Exchange Commission (including, but not limited to, our Annual
Report on Form 20-F filed with the U.S. Securities and Exchange Commission) and
the SWX Swiss Exchange. The Company does not assume any obligation to update any
forward-looking statements, whether as a result of new information, future
events or otherwise.

Additional information and where to find it:

In connection with the offer by SCOR, Converium expects to file a
solicitation/recommendation statement with the Securities and Exchange
Commission (the "SEC"). Investors and security holders are strongly advised to
read these documents when they become available because they will contain
important information about the tender offer and the proposed merger. Copies of
the


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solicitation/recommendation statement will be available free of charge at the
SEC's web site at www.sec.gov, or at Converium's website at www.converium.com.


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