NYSE Euronext and Atos Origin in Joint Venture Reorganization

December 11, 2007

Cleary Gottlieb is representing long-time client Euronext (now NYSE Euronext) in the reorganization of its 50/50 joint venture (called Atos Euronext Market Solutions) with Atos Origin relating to information technology services and the in-sourcing of certain key IT services and platforms currently operated or managed by AEMS. The reorganization was announced on December 11 and is expected to close in mid-2008.

Cleary Gottlieb represented Euronext in connection with the creation of AEMS in July 2005.

The reorganization will involve Euronext acquiring the 50% stake in AEMS owned by the Atos Origin group. Euronext will re-acquire ownership of the NSC cash trading and LIFFE CONNECT® derivatives trading platform technology and all of the management and development services surrounding these platforms together with AEMS’ third-party exchange technology business. Atos Origin will acquire the third-party Clearing & Settlement and Capital Markets businesses from AEMS.