Dassault Systemes joins the CAC 40 index of the Bourse de Paris

Dassault Systemes (Nasdaq: DASTY, Bourse de Paris), today announced that it will be included in the CAC 40 index of blue chip stocks on the Paris Bourse, beginning December 21, 2000. The move follows a decision on November 22 by the Conseil Scientifique des Indices (Scientific Council on Indexes) of the Paris stock exchange.

Paris, France – December 20, 2000 -- The CAC 40 index consists of 40 French and international stocks listed on the main market in Paris, chosen primarily for their market size and liquidity.

Dassault Systemes is the world leader in developing solutions for Product Lifecycle Management (PLM). Since going public in 1996, simultaneously on the Paris Bourse and Nasdaq, the Company has become an international player with six major brands: CATIA, ENOVIA, DELMIA, SolidWorks, Smart Solutions and Spatial. Today, Dassault Systemes has the largest development lab in Europe. For the nine-months ended September 30, 2000, the Company’s revenue increased 22% to EUR 435.9 million compared to the year-ago period. The Company’s net income increased 16% to EUR 92.2 million, or EUR 0.78 per diluted share, excluding acquisition costs. Dassault Systemes has over 2,900 employees worldwide.