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 March, 2007 CONVERIUM HOLDING AG (Translation of registrant's name into English) Dammstrasse 19 CH-6301 Zug 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, Zug Zug, Switzerland - February 28, 2007 - Converium management reiterates its support of the Board's decision to reject unsolicited offer The management of Converium reaffirms today its unanimous support of the Board's decision to reject the unsolicited offer by SCOR, at CHF 21.1 per share, for the whole of the share capital of Converium, based on closing share prices at February 16, 2007, that was published on February 26, 2007. The Board of Directors of Converium continues to believe that SCOR's acquisition currency is weak: based on today's closing share price of SCOR, the actual value of the SCOR offer equates to CHF 19.48 (exchange rate EUR/CHF 1.6125), failing to recognize Converium's stand alone franchise value. Converium further informs that in light of the conditions to an upgrade of its financial strength ratings, it commissioned a study analyzing settlements of SEC investigations concerning financial and other performance data. The study analyzed settlements compared with market capitalization and prior year earnings in more than 100 cases between July 30, 2002 and February 20, 2007, including approximately 65 cases relating to companies with market capitalizations of less than USD 5 billion. The settlements in those cases (USD 5 billion market cap and under) ranged from USD 0 to USD 50 million. If the previously announced SEC inquiries regarding non-traditional insurance and reinsurance products were ultimately settled within that range, Converium does not believe that the ultimate resolution would have a material adverse impact on our financial strength. However, Converium expresses no opinion and makes no prediction regarding the timing or substance, including amount, of the ultimate resolution of the SEC inquiry or whether and when we will achieve a ratings upgrade. Despite Converium's efforts to commission a comprehensive study, there can be no assurance that the study was entirely comprehensive. In addition, the SEC may, and likely will, consider factors other than market capitalization and earnings in determining the appropriate resolution of their inquiry and Converium cannot assure that this will not result in fines or penalties in excess of the range suggested by the study. Converium has made it a policy not to provide any quarterly or annual earnings guidance and it will not update any past outlooks for full-year earnings. It will, however, continue to provide investors with perspectives on its value drivers, certain financial guidance for the full year, its strategic initiatives and those factors critical to understanding its business and operating environment. 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 Investor Relations Specialist Development Officer inken.ehrich@converium.com kai-uwe.schanz@converium.com Phone: +41 44 639 90 94 Phone: +41 44 639 90 35 Fax: +41 44 639 70 94 Fax: +41 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 a "BBB+" financial strength rating (Credit Watch positive) 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, 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 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. 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:March 3, 2007