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, 2006 CONVERIUM HOLDING AG ---------------------------------------------- (Translation of registrant's name into English) Baarerstrasse 8 CH-6300 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 Converium sells it shareholdings in Nordic Aviation Insurance A/S (Nordisk Flyforsikring A/S) in Denmark Zug, Switzerland - March 7, 2006 - Converium Holding Ltd announced today that it has agreed in principle to sell its shareholdings in Nordic Aviation Insurance, a general aviation insurance company based in Denmark, Nordic Aviation Insurance underwrites throughout the Nordic and Baltic regions. Completion of this sale is subject to certain conditions being met, including approval by the FSA, the regulatory authority in Denmark. About Converium Converium is an independent international multi-line reinsurer known for its innovation, professionalism and service. Today Converium employs about 600 people in 18 offices around the globe and is organized into four business segments: Standard Property & Casualty Reinsurance, Specialty Lines and Life & Health Reinsurance, which are based principally on ongoing global lines of business, as well as the Run-Off segment, which primarily comprises the business from Converium Reinsurance (North America) Inc., excluding the US originated aviation business portfolio. Converium has a "BBB+" rating (outlook stable) from Standard & Poor's and a "B++" rating (outlook stable) from A.M. Best Company. Contacts: Zuzana Drozd Head of Investor Relations zuzana.drozd@converium.com Phone +41 (0) 44 639 91 20 Fax +41 (0) 44 639 71 20 Esther Gerster Head of Public Relations esther.gerster@converium.com Phone +41 (0) 44 639 90 22 Fax +41 (0) 44 639 70 22 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 7, 2006