Regulatory News:

Dassault Systèmes (Paris:DSY) (Euronext Paris: #13065, DSY.PA), world leader in 3D design software, 3D Digital Mock Up and Product Lifecycle Management (PLM) solutions, will host a webcast and a conference call on Thursday, April 26, 2012, to discuss its operating performance for the first quarter ended March 31, 2012.

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 9:00 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
Dassault Systèmes, the 3D Experience Company, provides business and people with virtual universes to imagine sustainable innovations. Its world-leading solutions transform the way products are designed, produced, and supported. Dassault Systèmes' collaborative solutions foster social innovation, expanding possibilities for the virtual world to improve the real world. The group brings value to over 150,000 customers of all sizes, in all industries, in more than 80 countries. For more information, visit www.3ds.com.

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

Dassault Systèmes :
Investor Relations Team
+33.1.61.62.69.24
or
FTI Consulting :
Jon Snowball
+44.20.7831.3113