IFRS Financial Information

Dassault Systèmes expects to publish its IFRS 2008 Half Year Report on or before August 6, 2008 and will issue a press release at that time indicating that the Half Year report in French and English has been published and made available on the Company’s website.

The table on page 13 of this press release sets forth a summary reconciliation of the Company’s financial results as presented under U.S. GAAP to its financial results as presented under IFRS as well as a summary reconciliation of its supplemental non-GAAP financial information to its supplemental adjusted IFRS financial information.

Business Outlook

Thibault de Tersant, Senior Executive Vice President and CFO, commented, “We are reconfirming our 2008 financial objectives for software revenue growth, operating margin expansion and EPS, based upon the business opportunities we see as well as the visibility provided by our financial model, and despite the economic environment.

“In July we completed the spin-off of one of our internal reseller businesses, DSF, and also completed the acquisition of Engineous Software. Therefore, we are updating our full year revenue range to take into account the net €6-7 million estimated effect of these transactions, with the new mid-point of our range now at about €1.325 billion, from €1.332 billion previously.”

The Company’s objectives are prepared and communicated only on a non-GAAP basis and are subject to the cautionary statement set forth below. The Company’s objectives are the following:

• Third quarter 2008 non-GAAP total revenue objective of about €305 to €315 million and non-GAAP EPS of about €0.41 to €0.44;
• 2008 non-GAAP software revenue objective reiterated at about 12% to 13% growth in constant currencies;
• 2008 non-GAAP operating margin objective reiterated at about 27% to 27.5%;
• Updating 2008 non-GAAP total revenue constant currency objective and reported revenue range to take into account the net €6-7 million effect of the July 2008 spin-off of DSF (€11 million revenue impact) and the addition of Engineous Software (€4 to €5 million revenue estimate) leading to 2008 non-GAAP revenue growth of about 9% to 10% in constant currencies and non-GAAP revenue range of about €1.320 to €1.330 billion from €1.325 to €1.340 billion;

• 2008 non-GAAP EPS reiterated at about €2.10 to €2.17 per diluted share;
• Objectives based upon exchange rate assumptions for the 2008 third quarter of US$1.60 per €1.00 and JPY 160 per €1.00 and 2008 full year exchange rate assumptions of US$1.57 per €1.00 and JPY 160 per €1.00;
• The Company anticipates that it will provide initial objectives with respect to its fiscal year 2009 at the time of its fourth quarter 2008 announcement which it expects to release in February 2009.

The non-GAAP objectives set forth above do not take into account the following accounting elements: deferred revenue write-downs estimated at approximately €1 million for 2008; stock-based compensation expense estimated at approximately €18 million for 2008 and amortization of acquired intangibles estimated at approximately €42 million for 2008. Those elements have not been updated yet to reflect the impact of the Engineous acquisition. In addition, the above objectives do not include any impact from other operating income and expense, net comprised of income and expenses in connection with the relocation of the Company’s corporate headquarters and restructuring expenses. These estimates also do not include any new stock option or share grants, or any new acquisitions or restructurings completed after July 31, 2008.

Webcast and conference call information

Dassault Systèmes will host a webcast and a conference call today, Thursday, July 31, 2008. Management will host a webcast at 8:00 AM London time/9:00 AM CET time and will then host the conference call at 3:00 PM CET/2:00 PM London time/9:00 AM New York time. The webcast and conference call will be available via the Internet by accessing http://www.3ds.com/corporate/investors/ . 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.