Rome, 31 May 2011 – Atlantia SpA announces that the shares issued under the bonus share issue approved by the shareholder resolution, adopted pursuant to art. 2442 of the Italian Civil Code by the Extraordinary General Meeting of 20 April 2011, will be made available to the holders of the rights via authorised intermediaries registered with Monte Titoli SpA at 9 June 2011, following the ex-dividend date of 6 June 2011 (coupon 17).