Press Release VELIZY-VILLACOUBLAY, France — September 5 , 2023 Declaration of the number of outstanding shares and voting rights as of August 31 , 202 3 Dassault Systèmes (Euronext Paris: FR0014003TT8, DSY.PA) today announced below the total number of its outstanding shares and voting rights as of

Press Release VELIZY-VILLACOUBLAY , France — August 28 , 2023 DISCLOSURE OF TRADING IN OWN SHARES (Repurchase program decided by the General Meeting of Shareholders of May 24 , 2023 ) Issuer: Dassault Systèmes (Euronext Paris: FR0014003TT8, DSY.PA) Type of securities: Ordinary shares Period: August

Press Release VELIZY-VILLACOUBLAY , France — August 24 , 2023 DISCLOSURE OF TRADING IN OWN SHARES (Repurchase program decided by the General Meeting of Shareholders of May 24 , 2023 ) Issuer: Dassault Systèmes (Euronext Paris: FR0014003TT8, DSY.PA) Type of securities: Ordinary shares Period: August

                                                                                Vélizy-Villacoublay, August 14, 2023                                     Disclosure of trading in own shares                     (Repurchase program decided by the General Meeting of Shareholders of May 24, 2023)      

                                                                                Vélizy-Villacoublay, August 7, 2023                                     Disclosure of trading in own shares                     (Repurchase program decided by the General Meeting of Shareholders of May 24, 2023)        

Press Release VELIZY-VILLACOUBLAY, France — August 4 , 2023 Declaration of the number of outstanding shares and voting rights as of July 31 , 202 3 Dassault Systèmes (Euronext Paris: FR0014003TT8, DSY.PA) today announced below the total number of its outstanding shares and voting rights as of July