Paris and New York, February 15, 2007 NYSE Euronext, Inc., NYSE Group, Inc. and Euronext N.V. have announced that NYSE Euronext, Inc., through its indirect wholly owned subsidiary NYSE Euronext (Holding) N.V., will commence an exchange offer today, Thursday, February 15 for all of the outstanding shares of Euronext. The exchange offer will close on March 21, 2007 and the settlement and delivery of the offer, as well as the admission of the NYSE Euronext shares on Euronext Paris and on NYSE, is expected to take place on April 4, 2007.