Union Vote on Tentative Labor Agreement at Stillwater Mine and Columbus Processing Facility Rescheduled

Stillwater Mining Company

today provided an update to the announcement dated May 28, 2015 regarding the Company's tentative agreement with the United Steel Workers International Union on the terms of a new labor agreement at the Stillwater Mine and Columbus processing facility. The vote by members of United Steel Workers Local 11-0001 on the proposed agreement originally scheduled for June 4 and June 5, 2015 has been deferred to June 9 and June 10, 2015. The current contract has been extended to June 12, 2015. The Negotiating Committee for the Union and the representative for USW International are unanimously recommending ratification of the tentative agreement to members of the United Steel Workers Local 11-0001. Approval by the union membership is required to ratify the tentative agreement.