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Aventis Removed From Euronext 100 Index - New Composition Of Euronext 100 Index

Date 12/08/2004

Following the official result of the takeover bid by the French company Sanofi Synthelabo (Euronext 100) for the French company Aventis (Euronext 100), Aventis will be removed from the Euronext 100 Index effective Tuesday 17 August 2004.

In accordance with the rules of the Euronext 100 Index the removed company will not be replaced immediately, but at the next quarterly review (effective 1 October 2004). As of Tuesday 17 August 2004, the Euronext 100 Index will consist of 99 companies.

Information/Isin codes
Information about Aventis:
Isin code: FR0000130460
Mkt cap: 53,089 million Euro
Index: removed from Euronext 100 Index effective Tuesday 17 August 2004

Information about Sanofi Synthelabo:
Isin code: FR0000120578
Mkt cap: 40,893 million Euro (the number of shares for Sanofi Synthelabo will not be adjusted for the time being)
Index: Euronext 100 Index

The Euronext 100 Index and Next 150 Index have been published since 2 October 2000. They are made up of the 250 securities with the highest market capitalisations traded on the official markets of Euronext. In order to be included in the indices the securities must meet liquidity criteria that are specified in the rules of the indices. Euronext Indices B.V. is the compiler of the indices under the supervision of the independent Euronext Indices Steering Committee