Osisko Responds to Goldcorp Announcement

MONTREAL, QUEBEC--(Marketwired - April 10, 2014) - Osisko Mining Corporation ("Osisko" or the "Corporation") (TSX:OSK)(FRANKFURT:EWX) 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.

About Osisko Mining Corporation

Osisko Mining Corporation operates the Canadian Malartic Gold Mine in Malartic, Quebec and is pursuing exploration on a number of properties in Ontario and Mexico.

Forward-Looking Statements

Certain statements contained in this press release may be deemed "forward-looking statements". All statements in this release, other than statements of historical fact, that address events or developments that the Corporation expects to occur, are forward looking statements. Forward looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects", "plans", "anticipates", "believes", "intends", "estimates", "projects", "potential", "scheduled" and similar expressions, or that events or conditions "will", "would", "may", "could" or "should" occur including, without limitation, the outcome of the review of Goldcorp's announcement by the Board of Directors. Although the Corporation believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, including, without limitation the results of the review of any such proposal, such statements are not guarantees of future performance and actual results may differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include the content of any business combination proposal, gold prices, the Corporation's limited experience with production and development stage mining operations, uninsured risks, regulatory changes or sanctions, defects in titles, availability of personnel, materials and equipment, timeliness of government approvals, actual performance of facilities, equipment and processes relative to specifications and expectations, unanticipated environmental impacts on operations market prices, continued availability of capital and financing and general economic, market or business conditions. These factors are discussed in greater detail in the Corporation's most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. The Corporation cautions that the foregoing list of important factors is not exhaustive. Investors and others who base themselves on the Corporation's forward-looking statements should carefully consider the above factors as well as the uncertainties they represent and the risk they entail. The Corporation believes that the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this press release should not be unduly relied upon. These statements speak only as of the date of this press release.