Paris, October 25, 2017 – Atos SE hereby announces the implementation from October 25, 2017, of an irrevocable mandate with an independent financial services provider, for the purpose of buying back its shares up to a maximum of 325,000 shares until December 31, 2017, for a maximum purchase price of €170 per share in accordance with the 14th resolution approved by the Combined General Meeting of May 24, 2017. These shares will be delivered to beneficiaries of performance shares or share purchase plans.