Bittnet Systems S.A. (hereinafter referred to as the “Company”) informs the shareholders about the upcoming closed period. Between January 15th 2018 and February 16th 2018, the shareholders who have the status of insider within the meaning of CNVM Regulation no. 1/2006, Law 24/2017, and Regulation (EU) no. 522/2016 and Regulation (EU) No. 596/2014, shall not conduct any transactions on their own account or for the account of a third party, directly or indirectly, relating to the shares or debt instruments of the issuer or other financial instruments linked to them during a closed period of 30 days before the announcement of an interim financial report. The closed period is due to the fact that on February 16th 2018, the Company will publish the preliminary results for 2017.