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Osisko Mining Corporation Announces Record Date for Annual and Special Meeting of Shareholders

MONTREAL, QUEBEC--(Marketwire - Feb 28, 2013) - Osisko Mining Corporation ("Corporation" or "Osisko") (OSK.TO)(EWX.F) announces that it will hold its 2013 Annual and Special Meeting of Shareholders (the "Annual Meeting") on May 9, 2013, in Montreal, Québec. The time and address of the location of the Annual Meeting will be set forth in Osisko''s Management Information Circular and Proxy Form for the Annual Meeting. The record date for determining the holders of the Corporation''s common shares entitled to vote at the Annual Meeting is March 25, 2013.

About Osisko Mining Corporation

Osisko Mining Corporation operates the Canadian Malartic Gold Mine in Malartic, Quebec and is carrying out aggressive exploration and project development elsewhere in Canada and Latin America.