Sigma-Aldrich to join Nasdaq-100 Index

New York: Sigma-Aldrich Corporation of St Louis, Missouri, will become a component of the Nasdaq-100 Index effective at the beginning of trading on 16 July 2002.

Sigma-Aldrich will also be included in the Nasdaq-100 Index Tracking StockSM. Sigma-Aldrich Corporation will replace Immunex Corporation, which is scheduled to be acquired by Amgen Inc.

With a market capitalisation of over $3.2 billion, Sigma-Aldrich Corporation is a life science and high-technology company. Its biochemical and organic chemical products and kits are used in scientific and genomic research, biotechnology, pharmaceutical development, the diagnosis of disease and chemical manufacturing. It has customers in life science companies, university and government institutions, hospitals and in industry.

The Nasdaq-100 Index, launched in January 1985, is one of the most widely followed benchmarks in the world. The Nasdaq-100 Index Tracking Stock represents ownership in the Nasdaq-100 Trust. The trust holds a portfolio of equity securities that compose the Nasdaq-100 Index and aims to provide investment results that generally correspond with its performance.