Notified on 23 October 2006, with effect only on 9 November 2006, this concentration consists of a merger between the activities of NYSE Group Inc. (henceforth "NYSE Group") and Euronext NV (henceforth "Euronext"), at an international level. On the basis of the Combination Agreement signed in accordance with the legislation of the State of Delaware, the two formerly independent undertakings will become subsidiary companies of a joint holding company, NYSE Euronext Inc. (henceforth "NYSE Euronext"), by means of an exchange offer and a merger.