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                                    Form 6-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                        Report of Foreign Private Issuer

                        Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934

                           For the month of July, 2007

                              CONVERIUM HOLDING AG
                  ---------------------------------------------
                 (Translation of registrant's name into English)

                             General Guisan-Quai 26
                                 CH-8022 Zurich
                                  Switzerland
                     --------------------------------------
                    (Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.

                         Form 20-F  X        Form 40-F
                                  -------             -------

Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                               Yes         No    X
                                  -------     -------

If "Yes" is marked, indicate the file number assigned to the registrant in
connection with Rule 12g3-2(b):  82-   Not Applicable



News release
Converium Holding Ltd, Zurich

Zurich, Switzerland - August 8, 2007 - SCOR successfully settles offer for
Converium

SCOR announced today that it was able to successfully settle the offer for
Converium. In total 92,969,353 shares were tendered. This settlement follows
SCOR's press release of last week with the announcement that the SCOR Group owns
96.32% of Converium shares after termination of the offer period. SCOR, as a
shareholder, now formally controls the company.

The change in ownership will be marked at Converium's Extraordinary General
Meeting (EGM) on August 30, 2007. At the EGM, Converium's current Board of
Directors will step down and be replaced by the following members (please see
www.converium.com for detailed CVs):

     o    Denis  Kessler (55,  French  citizen),  Chairman  and Chief  Executive
          Officer of SCOR since November 4, 2002.
     o    Jean-Luc Besson (59, French citizen), Chief Risk Officer of SCOR since
          July 1, 2004.
     o    Victor Peignet (49, French  citizen),  Chief Executive  Officer,  SCOR
          GLOBAL P&C - Worldwide since July 5, 2005.
     o    Gilles Meyer (49, French and Swiss citizen), Director of Business Unit
          1 of SCOR Global Life since November 23, 2006
     o    Georges Chodron de Courcelle (57, French  citizen),  Head of Corporate
          Investment  Banking at BNP Paribas and non-voting  member of the Board
          of SCOR.
     o    Jurg Marty  (63,  Swiss  citizen),  Managing  Director  for all common
          activities  of  the  Swiss  Public   Building   Insurance   Companies,
          especially CEO of the  Intercantonal  Union of Reinsurance  and CEO of
          the Swiss Pool for Earthquake Cover.
     o    J. Friedrich  Sauerlander (65, Swiss citizen),  serving as Chairman or
          Member of the Board of a number of companies and foundations.


The other agenda items for the EGM are the discharge of the current Board of
Directors and SCOR's proposition to change the name of the company from
Converium Holding AG to SCOR Holding (Switzerland) Ltd.



Enquiries



Beat W. Werder                                      Marco Circelli

Head of Public Relations                            Head of Investor Relations

beat.werder@converium.com                           marco.circelli@converium.com

Phone:  +41 44 639 90 22                            Phone:  +41 44 639 91 31



Fax:  +41 44 639 70 22                              Fax:  +41 44 639 71 31



Dr. Kai-Uwe Schanz Inken Ehrich

Chief Communication & Corporate Development        Investor Relations Specialist
Officer

kai-uwe.schanz@converium.com                       inken.ehrich@converium.com

Phone:  +41 44 639 90 35                           Phone:  +41 44 639 90 94

Fax:  +41 44 639 70 35                             Fax:   +41 44 639 70 94




About Converium

Converium is an 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 (outlook stable) from
Standard & Poor's and a "B++" financial strength rating (outlook positive) from
A.M. Best Company.



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, the Company's strategy
and management objectives, our growth prospects and our ability to ensure a
smooth transition of our business with that of SCOR. 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.



SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                               CONVERIUM HOLDING AG




                                               By: /s/ Inga Beale
                                                   Name:  Inga Beale
                                                   Title: CEO




                                               By: /s/ Christian Felderer
                                                   Name:  Christian Felderer
                                                   Title: General Legal Counsel



Date: August 13, 2007