VÉLIZY-VILLACOUBLAY, France — (BUSINESS WIRE) — October 6, 2009 — Dassault Systèmes (DS) (Paris: DSY) (Euronext Paris: #13065, DSY.PA), a world leader in 3D and Product Lifecycle Management (PLM) solutions, will host a webcast and a conference call on Thursday, October 29, 2009, to discuss its operating performance for the third quarter ended September 30, 2009.

The management of Dassault Systèmes will host the webcast at 8:30 AM London Time - 9:30 AM Paris Time and will then also host the conference call at 10:00 AM New York Time - 2:00 PM London Time - 3:00 PM Paris Time.

Both the webcast and the conference call will be available via the Internet by accessing Dassault Systèmes’ website at http://www.3ds.com/company/finance/.

Follow the directions on the main page to link to the audio.

Please go to the website at least fifteen minutes prior to the webcast or conference call to register, to download and install any necessary software. The webcast and conference call will be archived for 30 days.

About Dassault Systèmes

As a world leader in 3D and Product Lifecycle Management (PLM) solutions, Dassault Systèmes brings value to more than 115,000 customers in 80 countries. A pioneer in the 3D software market since 1981, Dassault Systèmes develops and markets PLM application software and services that support industrial processes and provide a 3D vision of the entire lifecycle of products from conception to maintenance to recycling. The Dassault Systèmes portfolio consists of CATIA for designing the virtual product - SolidWorks for 3D mechanical design - DELMIA for virtual production - SIMULIA for virtual testing - ENOVIA for global collaborative lifecycle management, and 3DVIA for online 3D lifelike experiences. Dassault Systèmes’ shares are listed on Euronext Paris (#13065, DSY.PA) and Dassault Systèmes’ ADRs may be traded on the US Over-The-Counter (OTC) market (DASTY). For more information, visit http://www.3ds.com.

CATIA, DELMIA, ENOVIA, SIMULIA, SolidWorks and 3D VIA are registered trademarks of Dassault Systèmes or its subsidiaries in the US and/or other countries.

Contact:
Dassault Systèmes:
Investor Relations Team
33.1.61.62.69.24
or
FD International:
Juliet Clarke / Haya Chelhot
44.20.7831.3113