Regulatory News:
(Repurchase program decided by the General Meeting of Shareholders of May 26, 2011)
Issuer: DASSAULT SYSTEMES S.A. (Paris:DSY)
Type of securities: ordinary shares
Period: from May 25 to May 31, 2012
Purchases realized during the period
A – Operations realized on the stock market
| Trading day | Â | Transaction | Â | Number of shares | Â | Weighted average unit price | Â | Amounts of transactions | |
| 05/25/2012 | Purchase | 45,207 | €73.58 | €3,326,331.06 | |||||
| Total |  | 45,207 | €73.58 | €3,326,331.06 |
B – Acquisitions of blocks realized on the over-the-counter market
No acquisition of blocks realized on the over-the-counter market occurred on May 25, 2012.
During the period, the issuer has not dealt on derivative instruments relating to its equity and has not carried out any purchase or sale of its equity upon exercise or maturity of derivative instruments.
Contacts:
Dassault Systèmes :
François-José Bordonado/Béatrix Martinez
33
1 61 62 69 24