VÉLIZY-VILLACOUBLAY, France — April 29, 2014 — Dassault Systèmes (Euronext Paris: #13065, DSY.PA), the 3DEXPERIENCE Company, world leader in 3D design software, 3D Digital Mock Up and Product Lifecycle Management (PLM) solutions announces the completion of its acquisition of Accelrys, Inc. (NASDAQ: ACCL) (Accelrys). After the previously announced completion of the tender offer by its wholly owned indirect subsidiary, 3DS Acquisition Corp., to purchase all of the outstanding shares of Accelrys common stock at an offer price of $12.50 per share in cash, without interest and subject to any required withholding of taxes, Dassault Systèmes completed the acquisition of Accelrys through a merger under Section 251(h) of the General Corporation Law of the State of Delaware.

At the effective time of the merger and subject to perfected appraisal rights, all remaining shares of Accelrys common stock not tendered into the tender offer and not owned by Accelrys, 3DS Acquisition Corp. or Dassault Systemes Americas Corp. were canceled and converted into the right to receive $12.50 per share in cash, without interest and subject to any required withholding of taxes, which is the same price that was paid in the tender offer. Shares of Accelrys common stock will no longer be listed on the NASDAQ Global Select Market.