0 40 80 KM

CASA BERARDI FAULT ZONE

PORCUPINEDESTOR FAULT

LARDER LAKECADILLAC FAULT

ON QC

Canadian Malartic1,688,000 oz @ 0.99 g/t Au (M)

7,344,000 oz @ 1.16 g/t Au (Ind)

Val-d'Or15.5 M oz Au

Holloway & Holt Mine 35,000 Oz @ 3.83 g/t Au (M)419,000 Oz @ 4.1 g/t Au (Ind)

Kirkland Lake24M Oz Au

OOssiisskkoo PPrroojjeeccttss

GGAARRRRIISSOONN

WWIINNDDFFAALLLL775500,,000000 oozz @@ 88..4422gg//tt AAuu ((IInndd)) 886600,,000000 ooss @@77..6622gg//tt AAuu ((IInnff))

URBAN BARRY

Detour Lake Mine3.60 M Oz @ 1.26 g/t Au (Proven)

10.77M Oz @ 0.95 g/t Au (Probable)

Rouyn-Noranda19M oz Au

MMAARRBBAANNSSOOUUAARRTT

Expanding Footprintin Québec and Ontario

A Leading Canadian GoldExploration and Development Company

EXPERIENCED MANAGEMENT, BOARD AND TECHNICAL TEAMDISCOVERY FINANCING CONSTRUCTION PRODUCTION

www.osiskomining.com | TSX:OSK

Share Ownership Structure

Osisko Management Team

John F. Burzynski – President & CEORobert Wares – Exec. VP, ExplorationJose V. Benavides – Exec. VP, Strategic Dev.John Hayes - SVP, Corporate Dev.Don Njegovan – VP, New Business Dev.Blair Zaritsky – Chief Financial OfficerGernot Wober – VP, Exploration CanadaMathieu Savard – VP, Exploration QuébecAlix Drapack – VP, Environment & Sust. Dev.

Common Shares Outstanding 154.6MM

Stock Options 10.5M @ $1.24(weighted average)

Warrants 18.5 @ $2.34(weighted average)

Fully Diluted Shares 183.6MM

Major Shareholders include OR

Management and Directors

14.5%

4.3%

Osisko Mining Inc. is a leading, well-funded gold developer with a portfolio of gold projects in Québec and Ontario.

$460M market capitalization

Strong balance sheet with over $140M cash and marketable securities

Focused on the emerging Windfall district in Québec:- 150,000m drilling- Advanced exploration at Windfall Deposit: - Metallurgical program started - Underground exploration (2017)- Upgrading camp and communications (2016)- Deposit Exploration Team focusing on Windfall

(MT) (G/T) (M OZ)

Marban 8.53 1.45 0.39Garrison 15.10 1.07 0.52

23.63 1.21 0.88

Marban 39.10 1.14 1.43Windfall 2.76 8.42 0.75Garrison 14.97 1.40 0.68

56.83 1.56 2.86

Marban 47.60 1.20 1.83Windfall 2.76 8.42 0.75Garrison 30.07 1.24 1.20

80.43 1.46 3.78

Marban 12.20 1.03 0.40Windfall 3.51 7.62 0.86Garrison 7.87 3.19 0.81

23.58 2.73 2.07

TOTAL M&I

INFERRED

CATEGORY

MEASURED

INDICATED

TONNES GOLD GRADE GOLD

Key Projects Summary |

MARBANWINDFALL - ADVANCING QUICKLY

WINDFALL DEPOSIT: +75,000M OF NEW DRILLING

GARRISON

0.88Moz Mea., 2.86Moz Ind. and 2.07Moz Inf. Across All Projects

Mineral Resources*

* Inferred resources have a great amount of uncertainty as to their existence and whether they can be mined legally or economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.As at September 2016

This document may include certain "forward-looking statements". All statements other than statements of historical fact, included herein, including, without limitation, statements regarding future plans and objectives of Osisko, are forward-looking statements that involve various risks, assumptions, estimates and uncertainties. These statements reflect the current internal projections, expectations or beliefs of

Osisko and are based on information currently available to Osisko. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. All of the forward looking statements contained in this presentation are qualified by these cautionary statements and the risk factors described above. Furthermore, all such statements are made of the date this document is created. An investment in Osisko is speculative due to the nature of Osisko's business. The ability of Osisko to carry out its growth initiatives as described in this document is subject to risk factors which are described in more detail in Osisko's Annual Information Form filed with the securities commissions or similar authorities in certain of the provinces of Canada. Investors should not place undue reliance on forward-looking statements as the plans, intentions or expectations upon which they are based might not occur. Investors and others who base themselves on Osisko's forward-looking statements should carefully consider such risk factors as well as the uncertainties they represent and the risk they entail. Osisko also cautions readers not to place undue reliance on these forward-looking statements. The forward-looking statements contained in this document are expressly qualified by this cautionary statement.

Forward Looking Statements

For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake project, please see the "Technical Report for the Windfall Lake Gold Project, Québec" dated April 17, 2014 (effective date March 3, 2014) filed on SEDAR under the issuer profile of Eagle Hill Exploration Corporation at www.sedar.com. Please note that the Windfall Lake PEA (as defined below)

is based on a mineral resource estimate with an effective date of November 13, 2014. The preliminary economic assessment of the Windfall Lake project (the "Windfall Lake PEA") is preliminary in nature and includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves, and there is no certainty that the Windfall Lake PEA will be realized. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Golden bear project, please see the "Technical Report for the Golden Bear Project, Ontario" dated March 3, 2014 (effective December 30, 2013) filed on SEDAR under the issuer profile of Northern Gold Mining Inc. at www.sedar.com. For the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Marban project, please see the "Details regarding Technical Report for the Marban project – Marban block property, Ontario" dated August 15, 2013 (effective date June 1, 2013) filed on SEDAR under the issuer profile of NioGold at www.sedar.com.

Technical Information

The technical information contained in this Presentation has been reviewed and approved by Gernot Wober B.Sc., P. Geo., a Qualified Person within the meaning of National Instrument 43-101 – Standards for Disclosure of Mineral Projects.Qualified Person

Malartic Camp, Québec, Canada

~1000 ha

0.36M oz @ 1.47 g/t (Mea.)1.12M oz @ 1.18 g/t (Ind.)0.13M oz @ 1.15 g/t (Inf.)

Upside for further discovery

20,000m drill programfor 2016

Kirkland Lake Camp, Ontario, Canada

~8,000 ha

0.52M oz @ 1.07 g/t (Mea.)0.68M oz @ 1.40 g/t (Ind.)0.81M oz @ 3.19 g/t (Inf.)

Good potential to expand known resources

Exploration planning in progress

~82,000 ha

Urban Barry Camp, Québec, Canada

0.748M oz @ 8.42 g/t (Ind.)0.860M oz @ 7.62 g/t (Inf.)

~80,000m drilling completed to date. Program increasing.

Resource upgradeand expansion

Regional exploration advancing

RESOURCEUPDATEQ1-17

FEASIBILITY2H-18

PERMITTING2018

CONSTR.2019

1600 m

Osisko Mining Inc.