Osisko Responds; Will Consider Goldcorp Offer

Osisko Mining Corporation ("Osisko" or the "Corporation")

notes the announcement by Goldcorp Inc. ("Goldcorp") that it intends to amend its hostile offer to acquire all of the outstanding common shares of Osisko (the "Offer") to, among other things, extend the expiry date, increase the consideration payable and reduce the minimum tender condition. The Board of Directors of Osisko will consider this announcement. Until the Corporation completes its review, it will not comment further or speculate as to any future course of action it might take. Shareholders are reminded that the Corporation recommends that shareholders defer taking any action in respect of the hostile Offer until the Board of Directors of the Corporation makes a recommendation as to the merits of the hostile Offer.