Stock Exchange Release Talvivaara Mining Company Plc 24 June 2015 Solidium Oy will make a supplementary proposal to the Annual General Meeting on the composition of Talvivaara's Board of Directors The largest shareholder of Talvivaara Mining Company Plc ("Company"), the state- owned investment company Solidium Oy has today notified the Company that it will make a proposal to the Annual General Meeting of the Company convened for 25 June 2015, which supplements the proposal of the Shareholders' Nomination Panel on the number of the members and the composition of the Board of Directors. Solidium Oy will propose that the General Meeting would resolve the number of the members of the Board of Directors to be five (5) while the proposal of the Nomination Panel is four (4). Furthermore, Solidium Oy will propose that CEO of Solidium Oy, Mr. Kari Järvinen would be elected as a member of the Board in addition to Mr. Tapani Järvinen, Mr. Pekka Perä, Mr. Stuart Murray and Ms. Solveig Törnroos-Huhtamäki proposed by the Nomination Panel. According to Solidium Oy's notification it has considered taking an active role in the Board of Directors of the Company being the best way to support the success of the Sotkamo mining operations. Prior to making the proposal, Solidium Oy has discussed the matter with the members of the Nomination Panel which all have expressed their support to the proposal. Enquiries Talvivaara Mining Company Plc Tel: +358 20 712 9800 Pekka Perä, CEO Annex: Biography of Kari Järvinen: http://hugin.info/136227/R/1931028/694256.pdf This announcement is distributed by GlobeNewswire on behalf of GlobeNewswire clients. The owner of this announcement warrants that: (i) the releases contained herein are protected by copyright and other applicable laws; and (ii) they are solely responsible for the content, accuracy and originality of the information contained therein. Source: Talvivaaran Kaivososakeyhtiö Oyj via GlobeNewswire [HUG#1931028]