Company Web Site: www.osisko.com

(NI) 43-101 reports from projects located in: Canada (CA)

This report is based on NI 43-101 disclosures and fully diluted share counts available on: 2009-12-14. Metrics have been updated with stock price and metal prices in effect at the close of Canadian markets on 2010-03-11.

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GoldMinerPulse Most Optimistic Resource Estimate Summary (MORE):
Metrics last with prices in effect at the TSX/TSXV close on 2010-03-11

Project/Deposit	CC	MVpSh	PP%	MI%	I%	Gold
Canadian Malartic	CA	$55.62	36%	63%	1%	17.71 M oz
Duparquet	CA	$3.29	0	18%	82%	1.05 M oz
GoldMinerPulse Metrics - Total All Projects/Deposits by Metal, prices from 2010-Mar-11
Metric / Metal						Gold
Metal Totals						18.75 M oz
Metal Prices in US$ (from 2010-03-11)						$1,108.90 per oz
Metal Value per Share (MVpSh) (Shown in US$ and based on fully diluted share count shown below)						$58.91
Percentage of Total Metal Value						100.00%
PP% | MI% | I%						34% | 61% | 6%
GoldMinerPulse Metrics - All Metals from All Projects/Deposits and Prices from 2010-Mar-11
Metal Value per Share (MVpSh)						US$58.91
Average Ore Value per Tonne						US$39.2
Metal Value Leverage (MVL)						6.87
Market Capitalization as % of Metal Value						14.5%
Recent Stock Price						C$8.78   (TSX/TSXV close on 2010-03-11.)   Conversion rate used: 1 Cnd$ = 0.976275 US$ )
Fully Diluted Share Count						353.00 M    ( Osisko Mining Corporation Share Structure web page viewed December 2009. )
PP% | MI% | I%						34% | 61% | 6%
Gold Metrics-- all Projects/Deposits
Average Gold Ore Grade						1.099 g/t
Market Capitalization     per oz of Gold In Ground						$161.34   US$  |   165.26   C$
Gold Eq Oz Estimate						18.75 M oz   ( 18.75 M oz are in ground)
Market Capitalization     per oz of Gold Equilavent						$161.34   US$  |   165.26   C$
See terms for more about GoldMinerPulse metrics.

GoldMinerPulse Coverage Status:

• GoldMinerPulse coverage of Osisko Mining Corporation is complete pending a final internal review.

(NI) 43-101 Report:

Title: An updated mineral resource estimate for South-Barnat Deposit Malartic, Quebec On behalf of Osisko Mining Corporation
Date: 2009-06-23 (182 pages)

Updates: December 14, 2009, OSISKO RELEASES NEW RESOURCE ESTIMATE FOR CANADIAN MALARTIC PROJECT

Project Location: Quebec, Canada  /  Mining Region: Abitibi

Map View: View project on a Google Map.

Most Optimistic Resource Estimates (MORE):

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$19.81	6.31 M oz	1.070 g/t	183.30 M t
Estimate notes: See Table 6-3 Canadian Malartic Feasibility Study reserve and resource estimates on p. 35 of 182 in the NI 43-101 dated June 2009.

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$35.13	11.18 M oz	1.100 g/t	316.20 M t
Estimate notes: See OSISKO RELEASES NEW RESOURCE ESTIMATE FOR CANADIAN MALARTIC PROJECT Cutoff grade 0.34 grams per tonne gold

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$0.69	218.63 K oz	0.340 g/t	20.00 M t
Estimate notes: See notes for Proven + Probable above.

(NI) 43-101 Report:

Title: Technical Report on BEATTIE-DONCHESTER GOLD MINE PROPERTY DUPARQUET TOWNSHIP, QUEBEC. NI 43-101 Report On Behalf of: Clifton Star Resources Inc.
Date: 2009-10-22 (182 pages)

Updates: Osisko and Clifton Star Complete Joint Venture Agreement on Duparquet Project", December 11, 2009.

NOTE: This report assumes Osisko will earn its maximum 50% interest in the project.

Project Location: Quebec, Canada

Map View: View Duparquet project on a Google Map.

Most Optimistic Resource Estimates (MORE):

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$0.47	151.01 K oz	3.220 g/t	2.92 M t
Estimate notes: Estimate from Beattie mine: See p. 7 of 182 of the NI 43-101 report dated October 2009. Resource quantities adjusted for ownership percentage of 50.0%. 1.0 g/t Au/t cut-off.

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$1.08	345.18 K oz	3.060 g/t	7.02 M t
Estimate notes: Estimate from Beattie mine: See p. 8 of 182 of the NI 43-101 report dated October 2009. Resource quantities adjusted for ownership percentage of 50.0%. 1.0 g/t Au cut-off.

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$0.11	34.86 K oz	3.720 g/t	582.94 K t
Estimate notes: Estimate from Donchester mine: See p. 8 of 182 of the NI 43-101 report dated October 2009. Resource quantities adjusted for ownership percentage of 50.0%. 1.0 g/t Au cut-off.

Metal	MVpSh	Contained Metal Quantity	Ore Grade	Ore Quantity
Gold	$1.62	515.94 K oz	2.780 g/t	11.54 M t
Estimate notes: Estimate from Donchester mine: See p. 8 of 182 of the NI 43-101 report dated October 2009. Resource quantities adjusted for ownership percentage of 50.0%. 1.0 g/t Au cut-off.