DASSAULT SYSTEMES TO PUBLISH ITS THIRD QUARTER 2020 RESULTS, WEBCAST AND CONFERENCE CALL ON OCTOBER 22 nd , 2020     VÉLIZY-VILLACOUBLAY, France — October 12 th , 2020 — Dassault Systèmes (Euronext Paris: #13065, DSY.PA), the 3DEXPERIENCE Company, world leader in 3D design software, 3D Digital Mock

Declaration of the number of outstanding shares and voting rights as of September 30, 2020 Vélizy-Villacoublay (France) October 6, 2020 – Dassault Systèmes (Euronext Paris: #13065, DSY.PA) reports below the total number of its outstanding shares and voting rights as of September 30, 2020, according

Declaration of the number of outstanding shares and voting rights as of August 31, 2020 Vélizy-Villacoublay (France) September 3, 2020 – Dassault Systèmes (Euronext Paris: #13065, DSY.PA) reports below the total number of its outstanding shares and voting rights as of August 31, 2020, according to

Declaration of the number of outstanding shares and voting rights as of July 31, 2020 Vélizy-Villacoublay (France) August 7, 2020 – Dassault Systèmes (Euronext Paris: #13065, DSY.PA) reports below the total number of its outstanding shares and voting rights as of July 31, 2020, according to

RAPPORT FINANCIER SEMESTRIEL 30 JUIN 2020 Société européenne au capital de 132 127 159,50 euros Siège social : 10, rue Marcel Dassault – 78140 Vélizy-Villacoublay 322 306 440 RCS Versailles   Sommaire 1 PERSONNE RESPONSABLE 1.1      Responsable du Rapport Financier Semestriel 1.2      Attestation

Availability of Dassault Systèmes’ 2020 Half-Year Financial Report (IFRS Half-Year Consolidated Condensed Financial Statements) Vélizy-Villacoublay, France – July 24, 2020 — Dassault Systèmes (Euronext Paris: #13065, DSY.PA), the 3D EXPERIENCE Company, world leader in 3D design software, 3D Digital