Osisko Reminds Shareholders of Important Vote Deadline to Approve the Acquisition of Osisko by Agnico Eagle and Yamana

MONTREAL, QUEBEC--(Marketwired - May 26, 2014) - Osisko Mining Corporation ("Osisko" or the "Company") (TSX:OSK)(FRANKFURT:EWX) would like to remind securityholders of Osisko ("Securityholders") of the approaching deadline to vote upon the approval of the joint acquisition of 100% of the outstanding shares of Osisko by Agnico Eagle Mines Limited ("Agnico Eagle") and Yamana Gold Inc. ("Yamana") pursuant to a plan of arrangement (the "Arrangement") at an upcoming annual and special meeting (the "Meeting") of Osisko being held at 1:30 p.m. (EDT) on Friday May 30, 2014 at Fairmont The Queen Elizabeth hotel in Montreal, Québec. The deadline for submitting proxies is 1:30 p.m. (EDT) on Wednesday, May 28, 2014.

The Arrangement

Under the Arrangement, each outstanding common share of Osisko will be exchanged for C$2.09 in cash, 0.07264 of a common share of Agnico Eagle, 0.26471 of a common share of Yamana, and one common share of a newly formed company that will acquire certain assets of Osisko as part of the Arrangement ("New Osisko").

Securityholders are encouraged to read Osisko's management information circular dated May 1, 2014 for full details of the business of the Meeting, including the Arrangement which was mailed to Osisko Securityholders and is also available on Osisko's website at www.osisko.com or on SEDAR at www.sedar.com.

Board Recommendations

OSISKO'S BOARD OF DIRECTORS HAS UNANIMOUSLY DETERMINED THAT THE ARRANGEMENT IS IN THE BEST INTERESTS OF OSISKO AND ITS SECURITYHOLDERS AND RECOMMENDS THAT OSISKO SECURITYHOLDERS VOTE IN FAVOUR OF THE ARRANGEMENT AND ALL OTHER RESOLUTIONS BEING PROPOSED BY OSISKO AT THE MEETING.

How to Vote and Shareholder Questions

Osisko Securityholders are urged to vote today, regardless of the number of shares or options owned.

As time is of the essence, Securityholders are encouraged to vote via the internet or by telephone following the instructions found on their Proxy or Voting Instruction Form by May 28, 2014 at 1:30 p.m. (EDT). To ensure your vote is received in a timely manner, please vote at least 24 hours prior to the deadline.

Osisko Securityholders who have questions or require assistance with voting can contact Laurel Hill Advisory Group, Osisko's proxy solicitation agent, by telephone at: 1-877-452-7184 (North American Toll Free) or 416-304-0211 (Collect Outside North America); or by email at assistance@laurelhill.com.

About Osisko

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

About Agnico Eagle

Agnico Eagle is a senior Canadian gold mining company that has produced precious metals since 1957. Its seven mines are located in Canada, Finland and Mexico, with exploration and development activities in each of these regions as well as in the United States.

About Yamana

Yamana is a Canadian-based gold producer with significant gold production, gold development stage properties, exploration properties, and land positions throughout the Americas including Brazil, Argentina, Chile 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 Osisko 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 satisfaction of all technical, economical, regulatory and financial conditions in order to complete the Arrangement between Osisko, Agnico Eagle and Yamana, the realization of all expected benefits of this Arrangement, and the view on (i) the quality and the potential of Osisko's exploration and mining assets, (ii) the consideration offered to Osisko shareholders, and (iii) the potential of the New Osisko. Although Osisko believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, 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, gold prices, results of exploration and development activities, Osisko's limited experience with production and development stage mining operations uninsured risks, regulatory changes, defects in title, availability of personnel, materials and equipment, timeliness of government or court 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 Osisko's most recent Annual Information Form, which is filed on SEDAR and also provide additional general assumptions in connection with these statements. Osisko cautions that the foregoing list of important factors is not exhaustive. Investors and others who base themselves on the forward looking statements contained herein should carefully consider the above factors as well as the uncertainties they represent and the risk they entail. Osisko 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. Osisko undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, other than as required by applicable law.