Webcasted Meeting and Conference Call Information

Today, Thursday, July 28, 2011, Dassault Systèmes will first host a meeting in London, which will be simultaneously webcasted at 9:30 AM London time/10:30 AM CET time and will then host a conference call at 2:00 PM London time/3:00 PM CET/ 9:00 AM New York time. The webcasted meeting and conference call will be available via the Internet by accessing http://www.3ds.com/company/finance/. Please go to the website at least fifteen minutes prior to the webcast or conference call to register, download and install any necessary audio software. The webcast and conference call will be archived for 30 days.

Additional investor information can be accessed at http://www.3ds.com/company/finance/ or by calling Dassault Systèmes’ Investor Relations at 33.1.61.62.69.24.

Forward-looking Information

Statements herein that are not historical facts but express expectations or objectives for the future, including but not limited to statements regarding the Company’s non-IFRS financial performance objectives, are forward-looking statements.

Such forward-looking statements are based on Dassault Systèmes management's current views and assumptions and involve known and unknown risks and uncertainties. Actual results or performances may differ materially from those in such statements due to a range of factors. The Company’s current outlook for 2011 assumes, among other things, that there will be a slow economic recovery, but if global economic and business conditions improve more slowly than anticipated, or remain stable or further deteriorate, the Company’s business results may not develop as currently anticipated and may remain below their earlier levels for an extended period of time. In this regard, the impact of the earthquake of March 11, 2011, in Japan remains difficult to evaluate, but may be expected to have a negative impact on the Japanese economic recovery. Furthermore, due to factors affecting sales of the Company’s products and services, there may be a substantial time lag between an improvement in global economic and business conditions and an upswing in the Company’s business results.

In preparing such forward-looking statements, the Company has in particular assumed an average U.S. dollar to euro exchange rate of US$1.43 per €1.00 and an average Japanese yen to euro exchange rate of JPY117 to €1.00 for 2011; however, currency values fluctuate, and the Company’s results of operations may be significantly affected by changes in exchange rates. The Company’s actual results or performance may also be materially negatively affected by changes in the current global economic context, difficulties or adverse changes affecting its partners or its relationships with its partners, changes in exchange rates, new product developments, and technological changes; errors or defects in its products; growth in market share by its competitors; and the realization of any risks related to the integration of any newly acquired company and internal reorganizations. Unfavorable changes in any of the above or other factors described in the Company’s regulatory reports, including the 2010 Document de référence, as filed with the French Autorité des marchés financiers (AMF) on April 1, 2011, could materially affect the Company’s financial position or results of operations.

Non-IFRS Financial Information

Readers are cautioned that the supplemental non-IFRS information presented in this press release is subject to inherent limitations. It is not based on any comprehensive set of accounting rules or principles and should not be considered as a substitute for IFRS measurements. Also, the Company’s supplemental non-IFRS financial information may not be comparable to similarly titled non-IFRS measures used by other companies. Further specific limitations for individual non-IFRS measures, and the reasons for presenting non-IFRS financial information, are set forth in the Company’s annual report for the year ended December 31, 2010 included in the Company’s 2010 Document de référence filed with the AMF on April 1, 2011.

In the tables accompanying this press release the Company sets forth its supplemental non-IFRS figures for revenue, operating income, operating margin, net income and diluted earnings per share, which exclude the effect of adjusting the carrying value of acquired companies’ deferred revenue, stock-based compensation expense, the expenses for the amortization of acquired intangible assets, other income and expense, net, certain one-time gains included in financial revenue and other, net, and the income tax effect of the non-IFRS adjustments. The tables also set forth the most comparable IFRS financial measure and reconciliations of this information with non-IFRS information.

Information in Constant Currencies

When the Company believes it would be helpful for understanding trends in its business, the Company provides percentage increases or decreases in its revenue (in both IFRS as well as non-IFRS) to eliminate the effect of changes in currency values, particularly the U.S. dollar and the Japanese yen, relative to the euro. When trend information is expressed herein "in constant currencies", the results of the "current" period have first been recalculated using the average exchange rates of the comparable period in the preceding year, and then compared with the results of the comparable period in the preceding year.

About Dassault Systèmes

As a world leader in 3D and Product Lifecycle Management (PLM) solutions, Dassault Systèmes brings value to more than 130,000 customers in 80 countries. A pioneer in the 3D software market since 1981, Dassault Systèmes applications 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, EXALEAD for search-based applications and 3DVIA for online 3D lifelike experiences. For more information, visit http://www.3ds.com .