Dassault Systemes to sell its equity stake in AES to MSC.Software

Dassault Systemes (Euronext Paris # 13065, DSY.PA, Nasdaq : DASTY) and MSC.Software (Nyse:MNS) have signed a definitive agreement under which, as part of the acquisition of AES by MSC.Software, Dassault Systemes (DS) will sell its 19% equity interest in AES in a stock transaction. By virtue of DS’s equity ownership in AES, DS will have approximately a 9% equity interest in MSC.Software after closing of the transaction.

Suresnes, France, May 3, 2001 — This acquisition is a logical step, extending the recent alliance between DS and MSC.Software announced on april 24th 2001, whereby MSC.Software will deliver, sell and support the new generation of Version 5 Product Lifecycle Management (PLM) integrated Analysis and Simulation solutions. The acquisition of AES expands MSC.Software’s available market, by increasing MSC.Software’s offerings, including Product Lifecycle Management tools, information technology and consulting services. This acquisition strengthens the distribution channel of DS’ PLM solutions around CATIA, ENOVIA, DELMIA and Smart Solutions to both small and large enterprises, particularly in the US.