Conference call information Dassault Systèmes will host a teleconference call today, Thursday, October 26, 2006 at 3:00 PM CET/2:00 PM London/9:00 AM New York. The conference call will be available via the Internet by accessing www.3ds.com/corporate/investors/. Please go to the website at least fifteen minutes prior to the call to register, download and install any necessary audio software. The webcast teleconference will be archived for 30 days. Financial information to be discussed in the call will be available on the Company’s website prior to commencement of the teleconference at www.3ds.com/corporate/investors/. Additional investor information can be accessed at www.3ds.com/corporate/investors/ or by calling Dassault Systèmes’ Investor Relations at 220.127.116.11.69.24.