OSISKO WINDFALL DRILLING UPDATE: MORE HIGH-GRADE IN EXPANSION AND INFILL

Posted on September 15, 2022September 14, 2022 by lboivin

Including 203 g/t Au over 5.2 metres and 93.9 g/t Au over 7.6 metres

(Toronto, September 15, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 103 intercepts in 46 drill holes (4 from surface, 42 from underground) and 6 wedges. The infill intercepts are located inside defined mineral resource estimate (“MRE”) blocks (see Osisko news release dated August 30, 2022). The expansion intercepts are located outside the MRE blocks and either expand resource wireframes or are in a defined zone or corridor not yet correlated to a specific wireframe.

A new Lynx 4 zone announced earlier this year (see Osisko news release dated March 23, 2022) was included in the recent MRE as Lynx 4 wireframe 3466. Two expansion holes confirmed the growth potential of this wireframe with intercepts 56.9 g/t Au over 2.4 metres and 14.0 g/t Au over 2.9 metres, 170 metres and 80 metres below the current MRE blocks, respectively.

Expansion intercepts extending wireframes include: 29.1 g/t Au over 5.8 metres, a 231-meter extension of Triple Lynx wireframe 3155 below the MRE blocks, 203 g/t Au over 5.2 metres, a 33-meter extension of Triple Lynx wireframe 3120 to the west, and 51.4 g/t Au over 2.1 meters, a 39-meter extension of Triple Lynx wireframe 3161 to the east.

Infill results in this release were received after the June 7, 2022 database closed for use in the recently released MRE, and were not included. These infill results will be used in future mine planning.

Osisko Chief Executive Officer John Burzynski commented: “Our drill program continues to deliver significant high-grade results. The expansion holes continue to clearly demonstrate additional potential growth of the resource base at Windfall. As the focus shifts to engineering and the pending feasibility study, we are reducing the number of active drills at site, however we will maintain exploration work on high-potential expansion areas as well as drilling on key infill areas for mine planning.”

Select infill high-grade intercepts include: 93.9 g/t Au over 7.6 metres in WST-22-1040, 127 g/t Au over 5.7 metres in WST-22-1032; 112 g/t Au over 5.9 metres in WST-22-1033; 57.0 g/t Au over 9.3 metres in OSK-W-22-2601-W7; 53.4 g/t Au over 8.2 metres in WST-22-1026; 214 g/t Au over 2.0 metres in WST-22-1029; 176 g/t Au over 2.1 metres in WST-22-1048; 151 g/t Au over 2.2 metres in WST-22-1068 and 155 g/t Au over 2.0 metres in WST-22-1071A. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_Infill EN 20220915, Long Section_LX4-3466 EN 20220915, Long Section_Expan EN 20220915, PR_EN_20220915_Surface, PR_EN_20220915_UG.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-19-2108-W2	1736.9	1739.3	2.4	56.9	36.3	LX4_3466	Lynx 4
including	1737.9	1738.7	0.8	162	100	LX4_3466	Lynx 4
OSK-W-22-2540-W13	1293.8	1296.0	2.2	7.08		LX4	Lynx 4
	1374.0	1376.4	2.4	4.57		LX4_3463	Lynx 4
	1471.1	1474.0	2.9	14.0		LX4_3466	Lynx4
including	1471.1	1472.2	1.1	27.4		LX4_3466	Lynx4
OSK-W-22-2601-W7	1061.3	1067.1	5.8	29.1		TLX_3155	Triple Lynx
including	1062.2	1063.3	1.1	69.3		TLX_3155	Triple Lynx
	1091.0	1093.0	2.0	16.3		TLX	Triple Lynx
including	1091.0	1092.0	1.0	30.1		TLX	Triple Lynx
	1126.0	1128.7	2.7	4.49		TLX	Triple Lynx
including	1127.4	1127.8	0.4	15.7		TLX	Triple Lynx
OSK-W-22-2646-W8	1037.9	1043.8	5.9	7.27		TLX_3148	Triple Lynx
	1137.5	1139.5	2.0	6.18		TLX_3162	Triple Lynx
OSK-W-22-2655	310.6	313.3	2.7	10.7		BCT	Bobcat
including	310.6	311.4	0.8	23.6		BCT	Bobcat
	344.0	346.0	2.0	3.64		BCT	Bobcat
	385.0	387.0	2.0	80.8	50.0	LXM	Lynx
including	385.0	386.0	1.0	162	100	LXM	Lynx
	432.0	434.0	2.0	6.10		LXM	Lynx
	653.0	655.0	2.0	3.82		LSW_3508	Lynx SW
including	653.9	654.4	0.5	15.0		LSW_3508	Lynx SW
OSK-W-22-2656	579.0	581.2	2.2	4.57		LSW_3500	Lynx SW
WST-22-1024	160.0	162.0	2.0	5.74		TLX	Triple Lynx
including	160.0	160.6	0.6	18.9		TLX	Triple Lynx
WST-22-1025	135.4	137.7	2.3	4.10		LXM_3357	Lynx
including	137.0	137.7	0.7	11.9		LXM_3357	Lynx
WST-22-1026	351.8	354.0	2.2	4.82		TLX	Triple Lynx
including	353.1	354.0	0.9	10.8		TLX	Triple Lynx
WST-22-1032	109.0	111.1	2.1	6.17		TLX	Triple Lynx
including	109.8	110.1	0.3	17.1		TLX	Triple Lynx
	189.7	191.7	2.0	43.8	25.3	TLX	Triple Lynx
including	190.2	190.7	0.5	174	100	TLX	Triple Lynx
	205.9	208.1	2.2	24.6		TLX_3148	Triple Lynx
including	206.3	206.9	0.6	59.3		TLX_3148	Triple Lynx
WST-22-1040	242.8	248.0	5.2	203	43.8	TLX_3120	Triple Lynx
including	246.3	248.0	1.7	586	100	TLX_3120	Triple Lynx
WST-22-1047	41.0	43.0	2.0	125	25.2	LXM	Lynx
including	41.6	42.1	0.5	498	100	LXM	Lynx
WST-22-1049	224.0	226.0	2.0	8.88		TLX	Triple Lynx
including	225.0	226.0	1.0	17.6		TLX	Triple Lynx
WST-22-1052	446.0	448.0	2.0	7.83		LX4	Lynx 4
including	447.1	447.7	0.6	25.8		LX4	Lynx 4
WST-22-1053A	50.0	52.0	2.0	6.64		LXM	Lynx
including	50.0	50.4	0.4	33.0		LXM	Lynx
WST-22-1061	142.6	144.7	2.1	51.4	43.2	TLX_3161	Triple Lynx
including	143.3	144.0	0.7	125	100
and	144.4	144.7	0.3	60.8
WST-22-1073	211.7	214.8	3.1	4.85		LHW_3216	Lynx HW
WST-22-1085	254.0	256.1	2.1	4.23		TLX_3163	Triple Lynx
including	255.2	255.5	0.3	29.2		TLX_3163	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., BCT = Bob Cat, LHW = Lynx Hangingwall, LSW = Lynx South West, LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-22-2120-W4	1245.9	1248.0	2.1	16.4		LX4_3449	Lynx 4
including	1246.5	1247.0	0.5	65.8		LX4_3449	Lynx 4
	1251.9	1254.2	2.3	3.52		LX4_3449	Lynx 4
	1263.4	1265.6	2.2	24.1		LX4_3445	Lynx 4
including	1264.2	1264.7	0.5	78.6		LX4_3445	Lynx 4
OSK-W-22-2601-W7	1104.0	1106.0	2.0	5.59		TLX_3162	Triple Lynx
including	1104.0	1104.5	0.5	18.2		TLX_3162	Triple Lynx
	1112.0	1114.6	2.6	6.07		TLX_3162	Triple Lynx
including	1113.1	1113.8	0.7	17.6		TLX_3162	Triple Lynx
	1163.7	1173.0	9.3	57.0	24.9	TLX_3172	Triple Lynx
including	1166.1	1166.6	0.5	689	100
and	1170.3	1170.8	0.5	108	100
OSK-W-22-2605-W5	1339.7	1344.0	4.3	3.52		LX4_3445	Lynx 4
OSK-W-22-2651	534.0	536.0	2.0	5.35		LSW_3508	Lynx SW
including	535.0	536.0	1.0	10.4		LSW_3508	Lynx SW
	563.0	565.0	2.0	5.78		LSW_3500	Lynx SW
including	564.0	565.0	1.0	11.1		LSW_3500	Lynx SW
OSK-W-22-2652	599.6	601.7	2.1	9.69		LSW_3500	Lynx SW
including	600.0	600.4	0.4	45.4		LSW_3500	Lynx SW
OSK-W-22-2656	554.4	556.4	2.0	19.9		LSW_3508	Lynx SW
including	555.0	555.5	0.5	59.1		LSW_3508	Lynx SW
WST-22-1026	253.6	261.8	8.2	53.4	27.0	TLX_3158	Triple Lynx
including	257.6	258.2	0.6	214	100
and	258.2	258.8	0.6	347	100
WST-22-1027	234.4	236.7	2.3	19.8		TLX_3131	Triple Lynx
	403.0	405.0	2.0	9.17		LX4_3410	Lynx 4
including	403.4	404.2	0.8	22.7		LX4_3410	Lynx 4
WST-22-1029	143.1	145.1	2.0	214	53.4	LXM_3388	Lynx
including	143.1	143.4	0.3	1130	100	LXM_3388	Lynx
WST-22-1032	241.3	247.0	5.7	127	50.1	TLX_3158	Triple Lynx
including	243.4	244.9	1.5	370	100	TLX_3158	Triple Lynx
WST-22-1033	324.9	327.3	2.4	37.8		TLX_3158	Triple Lynx
including	325.6	326.4	0.8	90.2		TLX_3158	Triple Lynx
	373.0	376.0	3.0	3.52		TLX_3155	Triple Lynx
	467.4	473.3	5.9	112	44.5	TLX_3172	Triple Lynx
including	467.8	468.4	0.6	505	100
and	469.2	470.0	0.8	240	100
WST-22-1034	169.7	173.1	3.4	26.5		LXM_3388	Lynx
including	171.8	172.4	0.6	56.6		LXM_3388	Lynx
	579.0	581.9	2.9	54.1	41.7	LX4_3430	Lynx 4
including	581.0	581.9	0.9	140	100	LX4_3430	Lynx 4
WST-22-1035	212.2	215.0	2.8	12.2		TLX_3148	Triple Lynx
	277.0	279.2	2.2	23.3		TLX_3158	Triple Lynx
including	278.7	279.2	0.5	93.0		TLX_3158	Triple Lynx
WST-22-1037	212.3	214.3	2.0	10.4		TLX_3120	Triple Lynx
including	212.9	213.4	0.5	36.4		TLX_3120	Triple Lynx
	248.0	250.2	2.2	68.4	46.6	TLX_3158	Triple Lynx
including	248.9	249.9	1.0	148	100	TLX_3158	Triple Lynx
	336.0	338.2	2.2	6.37		TLX_3162	Triple Lynx
including	336.6	337.0	0.4	29.6		TLX_3162	Triple Lynx
WST-22-1038	272.0	275.3	3.3	5.62		TLX_3120	Triple Lynx
	277.9	280.2	2.3	28.4	18.9	TLX_3158	Triple Lynx
including	279.8	280.2	0.4	155	100	TLX_3158	Triple Lynx
	455.4	459.0	3.6	6.28		TLX_3172	Triple Lynx
including	458.5	459.0	0.5	37.3		TLX_3172	Triple Lynx
WST-22-1039	255.3	258.0	2.7	25.6		TLX_3158	Triple Lynx
including	256.6	257.0	0.4	58.8		TLX_3158	Triple Lynx
WST-22-1040	310.7	318.3	7.6	93.9	61.0	TLX_3158	Triple Lynx
including	311.7	313.1	1.4	236	100	TLX_3158	Triple Lynx
	361.3	366.7	5.4	11.2		TLX_3162	Triple Lynx
including	363.1	364.0	0.9	46.3		TLX_3162	Triple Lynx
	374.0	376.3	2.3	40.7	25.6	TLX_3162	Triple Lynx
including	375.9	376.3	0.4	187	100	TLX_3162	Triple Lynx
WST-22-1041B	170.0	172.5	2.5	15.6		LXM_3388	Lynx
including	170.6	171.1	0.5	66.8		LXM_3388	Lynx
	492.0	494.0	2.0	4.21		LX4_3404	Lynx 4
including	493.0	493.7	0.7	8.43		LX4_3404	Lynx 4
WST-22-1042	309.1	311.3	2.2	20.5		TLX_3158	Triple Lynx
including	309.1	309.5	0.4	47.6		TLX_3158	Triple Lynx
WST-22-1043	501.4	503.5	2.1	130	26.7	LX4_3410	Lynx 4
including	502.7	503.2	0.5	536	100	LX4_3410	Lynx 4
	529.9	533.1	3.2	5.60		LX4_3411	Lynx 4
including	532.6	533.1	0.5	27.8		LX4_3411	Lynx 4
WST-22-1044	57.0	59.2	2.2	90.2	27.0	LXM_3388	Lynx
including	58.7	59.2	0.5	378	100	LXM_3388	Lynx
WST-22-1045	233.1	236.5	3.4	7.40		TLX_3148	Triple Lynx
including	236.2	236.5	0.3	16.4		TLX_3148	Triple Lynx
WST-22-1046B	403.0	405.3	2.3	5.55		TLX_3162	Triple Lynx
including	403.5	403.8	0.3	29.7		TLX_3162	Triple Lynx
WST-22-1047	47.0	49.0	2.0	9.49		LXM_3354	Lynx
including	48.0	49.0	1.0	18.7		LXM_3354	Lynx
WST-22-1048	39.5	41.5	2.0	144	20.4	LXM_3354	Lynx
including	40.0	40.4	0.4	718	100	LXM_3354	Lynx
	61.4	63.5	2.1	176	34.0	LXM_3388	Lynx
including	61.9	62.6	0.7	526	100	LXM_3388	Lynx
WST-22-1052	177.0	179.0	2.0	17.7		LXM_3388	Lynx
including	177.9	178.4	0.5	40.6		LXM_3388	Lynx
	514.5	517.0	2.5	28.1		LX4_3430	Lynx 4
including	515.1	515.8	0.7	92.2		LX4_3430	Lynx 4
	519.0	521.0	2.0	6.81		LX4_3430	Lynx 4
WST-22-1053	48.5	50.5	2.0	8.51		LXM_3388	Lynx
including	50.0	50.5	0.5	33.8		LXM_3388	Lynx
WST-22-1058C	402.2	412.5	10.3	6.41		TLX_3162	Triple Lynx
including	405.6	406.0	0.4	95.3		TLX_3162	Triple Lynx
WST-22-1061	112.0	114.2	2.2	15.5		TLX_3121	Triple Lynx
including	113.1	114.2	1.1	30.9		TLX_3121	Triple Lynx
WST-22-1063A	175.3	180.3	5.0	22.4		TLX_3148	Triple Lynx
including	175.3	176.3	1.0	93.6
and	179.9	180.3	0.4	27.7
	185.0	187.0	2.0	5.35		TLX_3148	Triple Lynx
	241.3	246.2	4.9	51.7	46.6	TLX_3158	Triple Lynx
including	242.0	243.0	1.0	125	100	TLX_3158	Triple Lynx
WST-22-1065	156.0	158.1	2.1	7.44		LXM_3317	Lynx
including	157.5	158.1	0.6	18.4		LXM_3317	Lynx
WST-22-1066	77.9	80.0	2.1	29.9		LXM_3388	Lynx
including	78.5	78.8	0.3	78.4		LXM_3388	Lynx
WST-22-1068	190.0	192.0	2.0	45.9		TLX_3161	Triple Lynx
including	191.0	191.3	0.3	96.7		TLX_3161	Triple Lynx
	580.3	582.5	2.2	151	27.6	LX4_3430	Lynx 4
including	580.3	580.9	0.6	554	100	LX4_3430	Lynx 4
	586.0	588.5	2.5	52.9	23.8	LX4_3430	Lynx 4
including	586.6	587.0	0.4	282	100	LX4_3430	Lynx 4
WST-22-1070	161.8	163.9	2.1	62.4	38.7	TLX_3121	Triple Lynx
including	162.1	162.8	0.7	171	100	TLX_3121	Triple Lynx
WST-22-1071A	188.0	190.9	2.9	68.9	36.4	TLX_3161	Triple Lynx
including	189.2	190.2	1.0	194	100	TLX_3161	Triple Lynx
	203.8	205.8	2.0	155	65.5	TLX_3161	Triple Lynx
including	203.8	204.6	0.8	131	100
and	204.6	205.1	0.5	408	100
	242.0	244.0	2.0	5.63		TLX_3163	Triple Lynx
including	243.3	243.7	0.4	18.4		TLX_3163	Triple Lynx
	264.0	266.5	2.5	9.18		TLX_3149	Triple Lynx
including	264.0	265.0	1.0	20.0		TLX_3149	Triple Lynx
WST-22-1073	64.5	67.0	2.5	5.62		LXM_3388	Lynx
WST-22-1076	156.6	159.4	2.8	10.9		TLX_3161	Triple Lynx
including	156.6	156.9	0.3	74.0		TLX_3161	Triple Lynx
WST-22-1078	100.6	106.1	5.5	34.6	33.2	TLX_3161	Triple Lynx
including	100.6	101.2	0.6	101	100	TLX_3161	Triple Lynx
WST-22-1083	117.0	119.0	2.0	29.5	15.5	LXM_3317	Lynx
including	118.0	118.3	0.3	193	100	LXM_3317	Lynx
WST-22-1085	225.0	231.6	6.6	6.98		TLX_3161	Triple Lynx
including	227.0	228.0	1.0	23.0		TLX_3161	Triple Lynx
	296.0	299.0	3.0	4.66		TLX_3158	Triple Lynx
WST-22-1090	179.2	181.7	2.5	63.1	48.7	TLX_3161	Triple Lynx
including	179.9	180.7	0.8	145	100	TLX_3161	Triple Lynx
WST-22-1091	64.5	67.0	2.5	3.54		LXM_3388	Lynx
WST-22-1092	275.0	277.1	2.1	6.26		LHW_3212	Lynx HW
including	276.2	276.8	0.6	20.8		LHW_3212	Lynx HW
WST-22-1095	464.0	466.0	2.0	13.4		TLX_3162	Triple Lynx
including	465.1	466.0	0.9	28.9		TLX_3162	Triple Lynx
	508.0	512.0	4.0	45.0	30.4	TLX_3172	Triple Lynx
including	508.7	509.2	0.5	217	100	TLX_3172	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LHW = Lynx Hangingwall, LSW = Lynx South West, LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-19-2108-W2	117	-53	2013	453215	5435858	414	3825
OSK-W-22-2120-W4	114	-60	1337	453800	5435747	401	4275
OSK-W-22-2540-W13	117	-60	1773	453466	5435639	410	3925
OSK-W-22-2601-W7	125	-61	1209	453425	5435656	412	3900
OSK-W-22-2605-W5	112	-55	1401	453551	5435669	408	4025
OSK-W-22-2646-W8	109	-58	1254	453326	5435648	414	3825
OSK-W-22-2651	146	-57	567	452988	5435242	417	3325
OSK-W-22-2652	143	-55	633	453010	5435274	416	3350
OSK-W-22-2655	146	-60	675	452976	5435277	411	3325
OSK-W-22-2656	147	-56	672	452941	5435243	411	3275
WST-22-1024	131	-57	271	453701	5435376	-198	4000
WST-22-1025	122	-20	189	453507	5435332	-47	3825
WST-22-1026	153	-65	361	453646	5435347	-189	3950
WST-22-1027	138	-30	468	453444	5435276	-99	3725
WST-22-1029	155	-40	180	453506	5435331	-47	3825
WST-22-1032	147	-61	268	453646	5435347	-188	3950
WST-22-1033	128	-63	508	453510	5435330	-127	3825
WST-22-1034	130	-45	625	453507	5435331	-48	3825
WST-22-1035	122	-60	325	453701	5435376	-198	4000
WST-22-1037	163	-63	342	453646	5435347	-188	3950
WST-22-1038	170	-67	490	453645	5435346	-189	3950
WST-22-1039	113	-55	312	453701	5435376	-198	4000
WST-22-1040	134	-60	480	453510	5435330	-127	3825
WST-22-1041B	127	-43	585	453507	5435331	-48	3825
WST-22-1042	108	-57	342	453701	5435376	-198	4000
WST-22-1043	133	-26	561	453344	5435312	-66	3650
WST-22-1044	138	-16	193	453647	5435347	-187	3950
WST-22-1045	104	-54	339	453702	5435376	-198	4000
WST-22-1046B	124	-58	436	453510	5435331	-127	3825
WST-22-1047	130	-12	226	453647	5435347	-187	3950
WST-22-1048	139	-1	169	453647	5435347	-187	3950
WST-22-1049	129	-44	621	453507	5435328	-90	3825
WST-22-1052	119	-42	613	453506	5435331	-48	3825
WST-22-1053	115	-13	64	453648	5435348	-187	3950
WST-22-1053A	115	-12	193	453648	5435348	-187	3950
WST-22-1058C	121	-60	520	453511	5435331	-127	3825
WST-22-1061	160	-59	166	453600	5435324	-181	3900
WST-22-1063A	119	-55	291	453702	5435377	-198	4000
WST-22-1065	106	-18	238	453648	5435348	-187	3950
WST-22-1066	104	-26	237	453648	5435348	-188	3950
WST-22-1068	122	-46	628	453507	5435328	-90	3825
WST-22-1070	167	-57	181	453645	5435346	-188	3950
WST-22-1071A	139	-59	393	453509	5435330	-127	3825
WST-22-1073	155	19	255	453701	5435376	-195	4000
WST-22-1076	177	-60	208	453599	5435324	-181	3900
WST-22-1078	186	-52	133	453599	5435324	-181	3900
WST-22-1083	123	-36	187	453702	5435377	-198	4000
WST-22-1085	134	-58	423	453509	5435330	-127	3825
WST-22-1090	145	-57	317	453509	5435330	-127	3825
WST-22-1091	152	30	254	453701	5435376	-195	4000
WST-22-1092	147	-7	349	453510	5435330	-126	3825
WST-22-1095	125	-66	561	453510	5435330	-127	3825

Bobcat

Mineralization most commonly occurs in gold-bearing quartz-pyrite veins controlled by northeast trending faults and shears and to a lesser extent in minor crustiform quartz-tourmaline-ankerite-pyrite veins and pyrite replacement zones and stockwork. Mineralization is hosted in sheared mafic volcanics, rhyolites near faults, or at the contact with felsic porphyritic intrusions.

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Director of Exploration for Osisko’s Windfall gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols

True width determination is estimated at 55-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.5 g/t Au diluted over core lengths of at least 2.0 metres. NQ core assays were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using a Four Acid Digestion-ICP-MS method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The Mineral Resource Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated August 30, 2022, will be further described, including the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the August 30, 2022, news release, in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days, and assumes a cut-off grade of 3.50 g/t Au, comprises 811,000 tonnes at 11.4 g/t Au (297,000 ounces) in the measured mineral resource category, 10,250,000 tonnes at 11.4 g/t Au (3,754,000 ounces) in the indicated mineral resource category and 12,287,000 tonnes at 8.4 g/t Au (3,337,000 ounces) in the inferred mineral resource category. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal areas: Lynx, Main, and Underdog. Mineralization is generally comprised of sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres, including the Triple 8 (TP8) zone. The resources excluding TP8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding the Urban Barry area and nearby Quévillon area (over 2,400 square kilometres).

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future exploration activities, including drilling, at the Windfall gold deposit; the deposit remaining open along strike and at depth; the plunge potential of the Lynx and Underdog zones; expected grade and resource growth; cut-off grade and sensitivity analysis; and the significance of historic exploration activities and results. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO FILES TECHNICAL REPORT FOR WINDFALL MINERAL RESOURCE ESTIMATE UPDATE

Posted on September 14, 2022September 13, 2022 by lboivin

(Toronto, September 14, 2022) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce that it has filed a technical report in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101“) to update the mineral resource estimate on its 100% owned Windfall gold deposit. The technical report entitled “ Mineral Resource Estimate Update for the Windfall Project, Eeyou Istchee James Bay, Québec, Canada” and dated September 14, 2022 (with an effective date of June 7, 2022) has been prepared for Osisko by BBA Inc. The technical report is available on SEDAR (www.sedar.com) under Osisko’s issuer profile.

The technical report contains a non-material change from the news release published on August 30, 2022. Sensitivity Table 1 has been corrected for the 2.5g/t cut-off grade. This change does not impact the results of the August 30, 2022 news release as the modification affects only numbers presented for reference purposes in the news release. The NI 43-101 Technical Report cut-off grade has been determined with reference to a 3.5g/t cut-off grade. The Table 1 below (which is included in the Technical Report) should replace the Table 1 from the August 30, 2022 news release.

Table 1: Windfall Gold Deposit Mineral Resource Estimate Sensitivity Table

Cut-off ² (g/t Au)	Measured + Indicated					Inferred
Cut-off ² (g/t Au)	Tonnes¹ (000 t)	Gold (g/t)	Ag (g/t)	Ounces Au¹ (000 oz)	Ounces Ag¹ (000 oz)	Tonnes¹ (000 t)	Gold (g/t)	Ag (g/t)	Ounces Au¹ (000 oz)	Ounces Ag¹ (000 oz)
5.0	8,213	13.9	7.0	3,667	1,854	7,986	10.7	6.0	2,760	1,545
4.5	9,029	13.1	6.7	3,791	1,935	9,078	10.0	5.6	2,927	1,638
4.0	9,950	12.2	6.3	3,917	2,020	10,561	9.2	5.2	3,129	1,754
3.5	11,061	11.4	5.9	4,050	2,114	12,287	8.4	4.8	3,337	1,892
3.0	12,388	10.5	5.6	4,188	2,217	14,299	7.7	4.4	3,547	2,033
2.5	14,728	10.1	5.1	4,772	2,423	17,178	6.9	4.0	3,801	2,219

Notes: ¹Values are rounded to nearest thousand which may cause apparent discrepancies. ²MRE cut-off: 3.5 g/t Au. ³The cut-off grade variation is not applicable to the material in the Stockpiles.

Qualified Person

The technical report entitled, “Mineral Resource Estimate Update for the Windfall Project, Eeyou Istchee James Bay, Québec, Canada” and dated September 14, 2022 with an effective date of June 7, 2022, was prepared for Osisko by BBA Inc. (Pierre-Luc Richard, M.Sc., P.Geo (OGQ#1119) and Mathieu Belisle, P. Eng. (OIQ#128549)). Mr. Richard is an employee of PLR Resources Inc., subcontracted by BBA Inc. for purposes of the technical report and Mr. Belisle is an employee of BBA Inc. Each of Pierre-Luc Richard and Mathieu Belisle is considered to be “independent” of Osisko for purposes of Section 1.5 of NI 43-101. The scientific and technical content in this news release has been reviewed and approved by Mr. Mathieu Savard, P.Geo (OGQ #510), President of Osisko, who is a “qualified person” (within the meaning of NI 43-101).

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,400 square kilometres).

Cautionary Statements Regarding Mineral Resource Estimate

Readers are cautioned that mineral resources are not mineral reserves and that the economic viability of mineral resources that are not mineral reserves has not been demonstrated. The mineral resource estimate described in this news release may be materially affected by geology, environmental, permitting, legal, title, socio-political, marketing or other relevant issues. The mineral resource estimate is classified in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum’s “CIM Definition Standards on Mineral Resources and Mineral Reserves” incorporated by reference into NI 43-101. Readers are cautioned not to assume that further work on the stated mineral resources will lead to mineral reserves that can be mined economically.

CONTACT INFORMATION:

John Burzynski
President & Chief Executive Officer
Telephone (416) 363-8653

OSISKO DELIVERS UPDATED WINDFALL MINERAL RESOURCE ESTIMATE FOR PENDING YE2022 FEASIBILITY STUDY

Posted on August 30, 2022August 30, 2022 by lboivin

4.1 Million Ounces Measured and Indicated Resource Averaging 11.4 g/t Au

3.3 Million Ounces Inferred Resource Averaging 8.4 g/t Au

(Toronto, August 30, 2022) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to provide an updated mineral resource estimate (“MRE”) for its 100% owned world-class high-grade Windfall gold deposit, located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

This robust MRE includes approximately 1.9 million metres of drilling, with 1.7 million metres completed by Osisko since October 2015, completed as of May 2022 and all analytical results received as of June 7, 2022. The MRE will form the basis of the pending Windfall Project Feasibility Study, scheduled for delivery by YE2022.2022-08-30 MRE and upside potential_EN

HIGHLIGHTS

4.1 M oz Au measured & indicated (“M&I”) resource averaging 11.4 g/t Au
M&I resource ounces increase of 26% (0.8 M oz Au)
M&I resource grade increase of 8%
Lynx contains 65% of MRE total (M&I 3.1 M oz averaging 13.0 g/t Au; Inferred 1.7 M oz averaging 10.8 g/t Au)
50% of the MRE is hosted in 26 wireframes; 75% of MRE is hosted in 97 wireframes
98% of MRE is located from surface to 1200 m vertical depth
Exploration ramp access is currently at 635 m vertical depth in Lynx
Extraction and transportation of the Lynx 600 bulk sample is completed, processing at custom mill pending and results on schedule for early Q4 2022
Feasibility study on schedule for YE2022.

Chief Executive Officer of Osisko John Burzynski commented: “We’ve had a busy summer and have successfully completed another significant milestone at Windfall. With this final MRE update prior to our pending feasibility study, we have met and exceeded our objectives for the Windfall drill program: a robust measured and indicated resource of over 4 million ounces with an average grade of over 10 g/t Au. The scale of Windfall and the deposit grade has steadily increased since Osisko’s discovery of Lynx in late 2016. Lynx now represents almost two-thirds (65%) of the total gold in the MRE, and it continues to impress with a stand-alone total M&I resource of 3.1 M oz averaging 13.0 g/t Au.”

Mr. Burzynski continued: “Importantly, we completed the extraction and the transportation of the Lynx 600 (Triple Lynx) bulk sample in August, and the custom mill is being prepared for treating the test material. We expect to have the processed results in hand for this high-grade sample by early October and anticipate that it will once again confirm a higher grade than indicated by drilling. As a reminder, the processing of the prior two bulk samples from the upper areas of the deposit returned results that were 26% and 89% higher grade than anticipated from drilling (please see Osisko news releases dated June 11 and December 11, 2019). Finally, work is advancing well on the Windfall feasibility study, and we are on track for delivery by YE2022.”

The MRE tables below show the sensitivity to cut-off grades (Table 1) and the resources by area of the Windfall deposit (Table 2).

Table 1: Windfall Gold Deposit Mineral Resource Estimate Sensitivity Table

Cut-off ² (g/t Au)	Measured + Indicated					Inferred
Cut-off ² (g/t Au)	Tonnes¹ (000 t)	Gold (g/t)	Ag (g/t)	Ounces Au¹ (000 oz)	Ounces Ag¹ (000 oz)	Tonnes¹ (000 t)	Gold (g/t)	Ag (g/t)	Ounces Au¹ (000 oz)	Ounces Ag¹ (000 oz)
5.0	8,213	13.9	7.0	3,667	1,854	7,986	10.7	6.0	2,760	1,545
4.5	9,029	13.1	6.7	3,791	1,935	9,078	10.0	5.6	2,927	1,638
4.0	9,950	12.2	6.3	3,917	2,020	10,561	9.2	5.2	3,129	1,754
3.5	11,061	11.4	5.9	4,050	2,114	12,287	8.4	4.8	3,337	1,892
3.0	12,388	10.5	5.6	4,188	2,217	14,299	7.7	4.4	3,547	2,033
2.5	18,526	9.8	4.8	5,848	2,849	20,397	7.0	3.8	4,583	2,496

Table 2: Windfall Gold Deposit Mineral Resource Estimate by Area (3.5 g/t Au cut-off)

Area

Measured

Indicated

Inferred

Tonnes¹ (000 t)

Gold

(g/t)

(g/t)

Gold¹

(000 oz)

Ag¹

(000 oz)

Tonnes¹ (000 t)

Gold

(g/t)

(g/t)

Gold¹

(000 oz)

Ag¹

(000 oz)

Tonnes¹ (000 t)

Gold

(g/t)

(g/t)

Gold¹

(000 oz)

Ag¹

(000 oz)

Lynx²

671

11.4

7.2

247

154

6,638

13.2

6.7

2,814

1,426

4,774

10.8

6.9

1,663

1,063

Underdog

–

928

9.5

3.4

284

101

4,072

7.7

3.0

1,011

397

Main³

109

9.4

4.4

2,685

7.6

4.8

655

412

2,799

5.8

3.3

518

296

Triple 8

–

642

7.0

6.6

145

136

Total (in situ)

780

11.1

6.8

279

170

10,250

11.4

5.9

3,754

1,939

12,287

8.4

4.8

3,337

1,892

Stockpiles⁴

16.9

4.3

–

Total

811

11.4

6.7

297

174

10,250

11.4

5.9

3,754

1,939

12,287

8.4

4.8

3,337

1,892

Notes:¹Values are rounded to nearest thousand which may cause apparent discrepancies.²Lynx area includes: Lynx Main, Lynx HW, Lynx SW, Lynx 4 and Triple Lynx. ³Main area includes: Zone 27, Caribou 1&2, Caribou Extension, Bobcat, Mallard, Windfall Nord, and F-Zones. ⁴Cut-off grade is not applicable to the stockpiles. See Windfall Gold Deposit Mineral Resource Estimate notes further below.

This MRE is the result of 4,834 drill holes (1,852,861 metres of core) in the resource area, including 4,152 drill holes (1,665,282 metres of core) completed by Osisko from October 2015 to May 2022 with assays up to June 7, 2022. The Windfall MRE (with an effective date of June 7, 2022) was prepared by Osisko and reviewed and audited by BBA Inc., Montréal, Québec. The full technical report, which is being prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI-43-101”), will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days.

This mineral resource estimate reflects the current status of the geological interpretation supported by infill drilling, underground mapping and bulk sample results. Most mineralized envelopes in the Main area are associated with pyritic stringers. Lynx and Underdog mineralized lenses predominantly form an extensive anastomosed network of quartz-rich and pyrite-rich veins. The mineralization system is located near contacts between volcanic and pre-mineral intrusive rocks in the Main and Lynx areas, and more specifically, within pre-mineral intrusive units in Underdog.

The MRE is 50% contained within 26 wireframes, and 75% contained within 97 wireframes. The MRE considers a total of 579 mineralized lenses defined by individual wireframes with a minimum true thickness of 2.0 metres. The MRE reports grade blocks inside volumes potentially mineable by underground methods at a cut-off grade of 3.5 g/t Au (Table 3).

Table 3: Parameters used to estimate the underground cut-off grade

for the Windfall Gold Deposit Mineral Resource Estimation

Parameters	Unit	Value
Gold Price	USD/oz	1,600
Exchange Rate	USD/CAD	1.28
Mill Recovery	%	93.0
Payability	%	99.95
Sell Cost	USD/oz	5
Royalties (NSR)	%	2
Mining Cost	CAD/t milled	125
G&A Cost	CAD/t milled	39
Processing Cost	CAD/t milled	42
Environment	CAD/t milled	4
Calculated Cut-off Grade	g/t Au	3.5
MRE Cut-off Grade	g/t Au	3.5

Windfall Gold Deposit Mineral Resource Estimate Notes

The independent qualified person for the 2022 MRE, as defined by NI 43-101 guidelines, is Pierre-Luc Richard, P. Geo. (OGQ#1119), of PLR Resources Inc. The effective date of the estimate is June 07, 2022.

The Windfall mineral resource estimate follows the November 29, 2019, CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines.

These mineral resources are not mineral reserves as they have not demonstrated economic viability. The quantity and grade of reported Inferred mineral resources in this news release are uncertain in nature and there has been insufficient exploration to define these resources as Indicated or Measured; however, it is reasonably expected that the majority of Inferred mineral resources could be upgraded to Indicated mineral resources with continued exploration. Resources are presented undiluted and in situ and are considered to have reasonable prospects for economic extraction. Isolated and discontinuous blocks above the stated cut-off grade are excluded from the mineral resource estimate. Must-take material, i.e., isolated blocks below cut-off grade located within a potentially mineable volume, was included in the mineral resource estimate.

As of June 07, 2022, the database comprises a total of 4,834 drill holes for 1,852,861 m of drilling in the area extent of the mineral resource estimate, of which 4,152 drill holes (1,665,282 m) were completed and assayed by Osisko. The drill hole grid spacing is approximately 12.5 m x 12.5 m for definition drilling, 25 m x 25 m for infill drilling and larger for extension drilling.

All core assays reported by Osisko were obtained by analytical methods described below under “Quality Control and Reporting Protocols”.

Geological interpretation of the deposit is based on lithologies, mineralization style, alteration, and structural features. Most mineralization envelopes are subvertical, striking NE-SW and plunging approximately 40 degrees towards the North-East. The 3D wireframing was generated in Leapfrog Geo, a modelling software, from hand selections of mineralization intervals. The mineral resource estimate includes a total of 579 tabular, mostly sub-vertical domains defined by individual wireframes with a minimum true thickness of 2.0 m

Assays were composited within the mineralization domains into 2.0 m length composites. A value of 0.00125 g/t Au and 0.0025 g/t Ag (¼ of the detection limit) was applied to unassayed core intervals.

High-grade composites were capped. Capping was determined in each zone from statistical studies on groups of lenses sharing similar mineralization characteristics. Capping varies from 6 g/t Au to 200 g/t Au and from 5 g/t Ag to 150 g/t Ag. A three-pass capping strategy defined by capping values decreasing as interpolation search distances increase was used during grade estimation.

Block models were produced using Datamine™ Studio RM Software. The models are defined by parent cell sizes of 5 m EW, 2 m NS and 5 m height, and sub-blocked to minimum sub-cell sizes of 1.25 m EW, 0.5 m NS and 1.25 m height.

Ordinary Kriging (OK) based interpolations were produced for gold estimations in each zone of the Windfall deposit, while silver grade estimations were produced using Inverse Distance Squared (ID2) interpolations. Gold estimation parameters are based on composite variography analyses. The gold estimation parameters were used for the silver estimation.

Density values between 2.74 and 2.93 were applied to the mineralized lenses.

The Windfall mineral resource estimate is categorized as Measured, Indicated, and Inferred mineral resource as follows:

The Measured mineral resource category is manually defined and encloses areas where:

drill spacing is less than 12.5 m;
blocks are mostly informed by four drill holes;

geological evidence is sufficient to confirm geological and grade continuity;

lenses have generally been accessed by underground workings.

The Indicated mineral resource category is manually defined and encloses areas where:

drill spacing is generally less than 25 m;
blocks are informed by mostly three drill holes;

geological evidence is sufficient to assume geological and grade continuity.

The Inferred mineral resource category is manually defined and encloses areas where:

drill spacing is less than 100 m;
blocks are informed by a minimum of two drill holes;

geological evidence is sufficient to imply, but not verify geological and grade continuity.

Tonnage and gold grade of the stockpiles were estimated using the grade control model. Densities by lithologies, ranging from 2.76 to 2.84, were used in the estimation of the tonnages. Gold grades were estimated using muck samples weighted average results for every round tonnage, based on muck samples with an average sample weight of 3.4 kg taken every 8-yard scoop bucket. Capping varying between 60 g/t Au to 80 g/t Au was applied on the muck gold grade results. Silver grade in the stockpiles was reported from the resource block model as silver was not analyzed in the muck samples.

The mineral resource is reported at 3.5 g/t Au cut-off. The cut-off grade is based on the following economic parameters: gold price at 1,600 USD/oz, exchange rate at 1.28 USD/CAD, 93.0% mill recovery; payability of 99.95%; selling cost at 5 USD/oz, 2% NSR royalties, mining cost at 125 CAD/t milled, G&A cost at 39 CAD/t milled, processing cost at 42 CAD/t, and environment cost at 4 CAD/t.

Estimates use metric units (metres (m), tonnes (t), and g/t). Metal contents are presented in troy ounces (metric tonne x grade / 31.103475).

The independent qualified person is not aware of any known environmental, permitting, legal, title-related, taxation, socio-political or marketing issues, or any other relevant issue, that could materially affect the mineral resource estimate.

Qualified Person

The Windfall mineral resource estimate, with an effective date of June 7, 2022, was (i) prepared by Judith St-Laurent, P.Geo (OGQ #1023), Director of Resource Estimation at Osisko, and (ii) reviewed and approved by Pierre-Luc Richard, M.Sc., P.Geo (OGQ#1119,) , each of whom is a “qualified person” within the meaning of NI 43-101. Mr. Richard is an employee of PLR Resources Inc., subcontracted by BBA Inc. and is considered to be “independent” of Osisko for purposes of section 1.5 of NI 43-101. The scientific and technical content in this news release has been reviewed and approved by Mr. Mathieu Savard, P.Geo (OGQ #510), President of Osisko, who is a “qualified person” within the meaning of NI 43-101.

Quality Control and Reporting Protocols

NQ core assays were obtained by either 1 kilogram screen fire assay or standard 50 gram fire assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using a Four Acid Digestion-ICP-MS method at ALS Laboratories. Drill program design, Quality Assurance/ Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in this news release and assuming a cut-off grade of 3.5 g/t Au, comprises 811,000 tonnes at 11.4 g/t Au (297,000 ounces) in the measured mineral resource category, 10,250,000 tonnes at 11.4 g/t Au (3,754,000 ounces) in the indicated mineral resource category and 12,287,000 tonnes at 8.4 g/t Au (3,337,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release, certain of which are described in this news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal areas: Lynx, Main, and Underdog. Mineralization is generally comprised of sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres, including the Triple 8 (TP8) zone. The resources excluding TP8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Statements Regarding Estimates of Mineral Resources

This news release uses the terms measured, indicated and inferred mineral resources as a relative measure of the level of confidence in the resource estimate. Readers are cautioned that mineral resources are not mineral reserves and that the economic viability of resources that are not mineral reserves has not been demonstrated. The mineral resource estimate disclosed in this news release may be materially affected by geology, environmental, permitting, legal, title, socio-political, marketing or other relevant issues. The mineral resource estimate is classified in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum’s “CIM Definition Standards on Mineral Resources and Mineral Reserves” incorporated by reference into NI 43-101 (“CIM”). Under NI 43-101, estimates of inferred mineral resources may not form the basis of feasibility or pre-feasibility studies or economic studies except for preliminary economic assessments. Readers are cautioned not to assume that further work on the stated resources will lead to mineral reserves that can be mined economically.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Office Telephone (416) 363-8653

OSISKO WINDFALL INFILL DRILLING ADDS WIDE HIGH-GRADE

Posted on June 7, 2022June 6, 2022 by lboivin

Including 293 g/t Au Over 11.0 Metres

(Toronto, June 7, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 43 intercepts in 15 underground drill holes and 12 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Lynx continues to return wide high-grade intercepts which will be included in the upcoming feasibility study. Our headline hole, with an estimated true thickness of eight meters, and other holes with sub-intervals over a kilogram of gold per tonne, demonstrate the robust nature of the high-grade areas in the Lynx 4 and Triple Lynx zones.”

Selected high-grade intercepts include: 293 g/t Au over 11.0 metres in OSK-W-22-2605-W6, 199 g/t Au over 2.9 metres in OSK-W-22-2587-W6; 24.3 g/t Au over 13.4 metres in OSK-W-22-2587-W5; 73.4 g/t Au over 2.3 metres in WST-22-1041B and 54.9 g/t Au over 3.0 metres in WST-22-1046B. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_All zones In EN 20220607, Long Section_All zones Ex EN 20220607, PR_EN_20220607_Surface, PR_EN_20220607_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-22-2587-W4	1084.4	1093.7	9.3	5.67		TLX_3155	Triple Lynx
including	1088.5	1088.9	0.4	26.9		TLX_3155	Triple Lynx
OSK-W-22-2587-W5	1040.5	1043.0	2.5	8.52		TLX_3158	Triple Lynx
including	1040.5	1040.9	0.4	41.0		TLX_3158	Triple Lynx
	1052.4	1055.0	2.6	4.30		TLX_3158	Triple Lynx
including	1052.4	1052.8	0.4	18.9		TLX_3158	Triple Lynx
	1110.0	1112.1	2.1	8.85		TLX_3162	Triple Lynx
including	1110.7	1111.1	0.4	32.9		TLX_3162	Triple Lynx
	1120.7	1125.4	4.7	4.54		TLX_3162	Triple Lynx
including	1125.0	1125.4	0.4	23.6		TLX_3162	Triple Lynx
	1129.0	1131.0	2.0	8.25		TLX_3162	Triple Lynx
	1136.3	1149.7	13.4	24.3	14.6	TLX_3172	Triple Lynx
including	1141.3	1142.3	1.0	129	100
and	1142.3	1142.8	0.5	302	100
OSK-W-22-2587-W6	1122.0	1126.0	4.0	15.3	15.0	TLX_3162	Triple Lynx
including	1122.0	1122.4	0.4	104	100	TLX_3162	Triple Lynx
	1134.6	1141.2	6.6	10.3		TLX_3162	Triple Lynx
including	1134.6	1135.2	0.6	33.8		TLX_3162	Triple Lynx
	1149.1	1152.0	2.9	199	31.0	TLX_3172	Triple Lynx
including	1149.1	1149.6	0.5	423	100
and	1150.1	1150.4	0.3	1185	100
OSK-W-22-2601-W5	1011.0	1013.6	2.6	37.5		TLX_3158	Triple Lynx
including	1011.7	1012.1	0.4	95.5		TLX_3158	Triple Lynx
OSK-W-22-2605-W4	1301.2	1303.4	2.2	5.95		LX4_3449	Lynx 4
including	1302.5	1302.8	0.3	31.0		LX4_3449	Lynx 4
OSK-W-22-2605-W6	1316.4	1327.4	11.0	293	32.3	LX4_3449	Lynx 4
including	1317.4	1320.7	3.3	961	92.3
with	1318.8	1319.1	0.3	3040	100
with	1319.9	1320.2	0.3	5400	100
OSK-W-22-2646-W7	1066.0	1070.1	4.1	5.06		TLX_3158	Triple Lynx
including	1069.8	1070.1	0.3	30.6		TLX_3158	Triple Lynx
WST-21-0929A	191.0	193.2	2.2	20.0		TLX_3161	Triple Lynx
including	192.4	192.9	0.5	78.5		TLX_3161	Triple Lynx
WST-22-1014-W1	257.0	259.0	2.0	40.7		LXM_3367	Lynx
including	257.0	258.0	1.0	81.2		LXM_3367	Lynx
WST-22-1017	455.8	459.5	3.7	6.76		LX4_3401	Lynx 4
including	456.1	456.5	0.4	19.2		LX4_3401	Lynx 4
WST-22-1022	403.0	405.0	2.0	4.59		TLX_3162	Triple Lynx
WST-22-1023	204.0	206.1	2.1	27.2		TLX_3121	Triple Lynx
including	205.2	206.1	0.9	61.1		TLX_3121	Triple Lynx
	566.0	571.1	5.1	10.2		LX4_3404	Lynx 4
including	567.0	567.3	0.3	54.9		LX4_3404	Lynx 4
WST-22-1031A	449.0	451.0	2.0	7.47		LX4_3401	Lynx 4
including	450.2	450.7	0.5	19.4		LX4_3401	Lynx 4
	499.6	503.1	3.5	4.52		LX4_3457	Lynx 4
including	499.6	500.1	0.5	13.0
and	502.7	503.1	0.4	17.5
WST-22-1041B	526.8	529.1	2.3	73.4	61.1	LX4_3430	Lynx 4
including	528.4	528.7	0.3	143	100	LX4_3430	Lynx 4
WST-22-1043	330.7	332.7	2.0	6.19		TLX_3131	Triple Lynx
including	330.7	331.0	0.3	20.6		TLX_3131	Triple Lynx
WST-22-1045	291.5	293.7	2.2	29.8		TLX_3158	Triple Lynx
including	291.5	291.8	0.3	56.5		TLX_3158	Triple Lynx
WST-22-1046B	315.0	318.0	3.0	54.9	41.8	TLX_3158	Triple Lynx
including	315.0	315.6	0.6	157	100	TLX_3158	Triple Lynx
WST-22-1047	138.0	140.1	2.1	5.46		LXM_3345	Lynx
WST-22-1048	111.3	113.6	2.3	32.2		LXM_3314	Lynx
including	112.7	113.2	0.5	95.2		LXM_3314	Lynx
WST-22-1054	66.0	68.3	2.3	12.8		LXM_3388	Lynx
including	67.4	67.9	0.5	34.3		LXM_3388	Lynx
WST-22-1058C	339.3	344.7	5.4	10.6		TLX_3158	Triple Lynx
including	339.3	339.9	0.6	41.2		TLX_3158	Triple Lynx
WST-22-1060	99.6	102.1	2.5	19.4		TLX_3121	Triple Lynx
including	100.9	101.2	0.3	66.9		TLX_3121	Triple Lynx
WST-22-1062	153.6	156.0	2.4	35.6		TLX_3121	Triple Lynx
including	155.0	156.0	1.0	66.8		TLX_3121	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-22-2587-W3	1101.8	1104.7	2.9	17.8		TLX	Triple Lynx
OSK-W-22-2587-W5	1094.3	1096.7	2.4	8.91		TLX	Triple Lynx
including	1096.3	1096.7	0.4	36.9		TLX	Triple Lynx
OSK-W-22-2587-W6	1104.0	1106.0	2.0	9.11		TLX	Triple Lynx
including	1104.3	1104.7	0.4	38.5		TLX	Triple Lynx
OSK-W-22-2601-W6	1096.2	1099.1	2.9	3.97		TLX_3162	Triple Lynx
including	1096.5	1096.9	0.4	13.9		TLX_3162	Triple Lynx
OSK-W-22-2605-W4	1377.1	1379.1	2.0	6.74		LX4	Lynx 4
including	1378.0	1378.7	0.7	14.2		LX4	Lynx 4
OSK-W-22-2646-W6	1069.7	1072.4	2.7	30.6		TLX_3158	Triple Lynx
including	1070.1	1070.5	0.4	72.0
and	1071.0	1071.4	0.4	75.8
	1190.1	1194.2	4.1	16.1		TLX_3172	Triple Lynx
including	1190.1	1190.8	0.7	58.1		TLX_3172	Triple Lynx
OSK-W-22-2646-W7	1110.4	1112.5	2.1	8.53		TLX	Triple Lynx
including	1111.7	1112.0	0.3	57.1		TLX	Triple Lynx
OSK-W-22-2646-W8	1165.0	1167.3	2.3	7.79		TLX_3162	Triple Lynx
including	1166.0	1166.3	0.3	38.8		TLX_3162	Triple Lynx
	1220.2	1222.3	2.1	9.82		TLX_3172	Triple Lynx
including	1220.2	1221.0	0.8	23.2		TLX_3172	Triple Lynx
WST-22-1017	467.0	469.0	2.0	7.03		LX4	Lynx 4
including	468.0	469.0	1.0	12.4		LX4	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-22-2587-W3	127	-59	1221	453350	5435673	413	3850
OSK-W-22-2587-W4	127	-59	1218	453350	5435673	413	3850
OSK-W-22-2587-W5	127	-59	1227	453350	5435673	413	3850
OSK-W-22-2587-W6	127	-59	1203	453350	5435673	413	3850
OSK-W-22-2601-W5	125	-61	1215	453425	5435656	412	3900
OSK-W-22-2601-W6	125	-61	1212	453425	5435656	412	3900
OSK-W-22-2605-W4	112	-55	1425	453551	5435669	408	4025
OSK-W-22-2605-W6	112	-55	1404	453551	5435669	408	4025
OSK-W-22-2646-W6	109	-58	1263	453326	5435648	414	3800
OSK-W-22-2646-W7	109	-58	1227	453326	5435648	414	3800
OSK-W-22-2646-W8	109	-58	1254	453326	5435648	414	3800
WST-21-0929A	117	-45	379	453506	5435326	-90	3800
WST-22-1014-W1	123	-37	594	453507	5435332	-47	3800
WST-22-1017	138	-26	561	453344	5435312	-66	3650
WST-22-1022	132	-62	479	453510	5435330	-127	3800
WST-22-1023	120	-48	646	453506	5435326	-90	3800
WST-22-1031A	136	-28	577	453344	5435312	-66	3650
WST-22-1041B	127	-43	585	453507	5435331	-48	3800
WST-22-1043	133	-26	561	453344	5435312	-66	3650
WST-22-1045	104	-54	339	453702	5435376	-198	4000
WST-22-1046B	125	-58	436	453510	5435331	-127	3800
WST-22-1047	130	-12	226	453647	5435347	-187	3950
WST-22-1048	139	-1	169	453647	5435347	-187	3950
WST-22-1054	120	-29	196	453647	5435347	-188	3950
WST-22-1058C	121	-60	520	453511	5435331	-127	3825
WST-22-1060	140	-55	156	453601	5435325	-181	3900
WST-22-1062	144	-59	171	453601	5435325	-181	3900

Lynx Zone

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The Mineral Resource Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated January 10, 2022 is supported by the technical report entitled “Mineral Resource Estimate Update for the Windfall Project” dated February 10, 2022 (with an effective date of October 21, 2021), and assuming a cut-off grade of 3.50 g/t Au, comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the January 10, 2022, news release, certain of which are described in the January 10, 2022, news release, are further described in the full technical report for this updated mineral resource estimate in accordance with NI 43-101 and is available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of gold resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,500 square kilometres).

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL DRILLING INTERCEPTS HIGH-GRADE IN MULTIPLE LYNX ZONES

Posted on May 25, 2022May 24, 2022 by lboivin

Including 272 g/t Au Over 2.3 Metres and 26.3 g/t Au Over 15.8 Metres

(Toronto, May 25, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 71 intercepts in 27 underground drill holes and 13 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Infill drilling in support of the upcoming feasibility study continues to intersect high-grade across the deposit, especially in the Lynx area. This week’s expansion intercepts, including the higher-up Bobcat holes, are 25 metre step-outs which allow for these intercepts to be included in the resource estimate.”

Selected high-grade intercepts include: 272 g/t Au over 2.3 metres in WST-22-1018-W1, 26.3 g/t Au over 15.8 metres in OSK-W-22-2587-W3; 95.8 g/t Au over 3.1 metres in OSK-W-22-2601-W6; 131 g/t Au over 2.2 metres in OSK-W-22-2646-W5; 21.4 g/t Au over 13.2 metres in OSK-W-22-2605-W3; 39.9 g/t Au over 6.8 metres in OSK-W-22-2605-W2; 80.0 g/t Au over 3.2 metres in OSK-W-22-2646-W4, 125 g/t Au over 2.0 metres in WST-22-1019, 112 g/t Au over 2.2 metres in WST-22-1021 and 24.6 g/t Au over 9.6 metres in WST-22-1020. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_All zones In EN 20220525, Long Section_All zones Ex EN 20220525, PR_EN_20220525_Surface, PR_EN_20220525_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-22-2587-W3	1134.0	1149.8	15.8	26.3	11.3	TLX_3172	Triple Lynx
including	1148.3	1149.1	0.8	397	100	TLX_3172	Triple Lynx
OSK-W-22-2587-W4	1125.0	1127.0	2.0	20.6		TLX_3162	Triple Lynx
including	1126.0	1126.7	0.7	43.1		TLX_3162	Triple Lynx
	1139.0	1143.0	4.0	10.1		TLX_3170	Triple Lynx
including	1139.0	1139.7	0.7	43.1		TLX_3170	Triple Lynx
	1151.1	1153.5	2.4	30.7	24.5	TLX_3172	Triple Lynx
including	1152.0	1152.4	0.4	138	100	TLX_3172	Triple Lynx
OSK-W-22-2601-W4	1010.0	1012.1	2.1	121	35.8	TLX_3158	Triple Lynx
including	1010.0	1010.7	0.7	356	100	TLX_3158	Triple Lynx
OSK-W-22-2601-W6	1022.3	1025.4	3.1	95.8	70.8	TLX_3158	Triple Lynx
including	1024.0	1024.6	0.6	186	100	TLX_3158	Triple Lynx
OSK-W-22-2605-W2	1315.5	1322.3	6.8	39.9	23.9	LX4_3449	Lynx 4
including	1315.5	1316.0	0.5	186	100
and	1321.6	1322.0	0.4	266	100
OSK-W-22-2605-W3	1332.6	1345.8	13.2	21.4	17.1	LX4_3449	Lynx 4
including	1336.0	1336.5	0.5	212	100
and	1338.5	1339.4	0.9	58.1
OSK-W-22-2605-W4	1318.7	1322.1	3.4	11.2		LX4_3449	Lynx 4
including	1319.7	1320.0	0.3	32.9		LX4_3449	Lynx 4
	1324.7	1328.0	3.3	3.79		LX4_3449	Lynx 4
	1347.0	1364.5	17.5	4.66		LX4_3445	Lynx 4
OSK-W-22-2605-W5	1299.6	1303.1	3.5	35.0	30.3	LX4_3449	Lynx 4
including	1301.1	1301.8	0.7	124	100	LX4_3449	Lynx 4
	1313.7	1316.1	2.4	4.99		LX4_3449	Lynx 4
including	1314.5	1315.2	0.7	10.8		LX4_3449	Lynx 4
OSK-W-22-2605-W6	1361.6	1364.3	2.7	4.27		LX4_3445	Lynx 4
OSK-W-22-2646-W4	1149.0	1151.3	2.3	10.0		TLX_3162	Triple Lynx
including	1149.4	1149.9	0.5	44.4		TLX_3162	Triple Lynx
	1186.4	1189.6	3.2	80.0	64.5	TLX_3172	Triple Lynx
including	1186.4	1187.0	0.6	175	100	TLX_3172	Triple Lynx
OSK-W-22-2646-W5	1046.3	1048.3	2.0	41.0	21.3	TLX_3158	Triple Lynx
including	1046.6	1046.9	0.3	231	100	TLX_3158	Triple Lynx
	1050.1	1052.2	2.1	6.71		TLX_3158	Triple Lynx
WST-21-0713A	79.8	82.0	2.2	6.24		LXM_3371	Lynx
WST-21-0845	86.0	88.0	2.0	5.19		LXM_3336	Lynx
including	86.7	87.0	0.3	34.4		LXM_3336	Lynx
	98.6	100.7	2.1	18.8		LXM_3371	Lynx
including	100.0	100.4	0.4	91.0		LXM_3371	Lynx
WST-21-0847	96.2	99.8	3.6	20.2		LXM_3371	Lynx
including	96.2	97.0	0.8	59.4		LXM_3371	Lynx
WST-21-0848	73.5	75.9	2.4	7.49		LXM_3336	Lynx
including	75.5	75.9	0.4	44.5		LXM_3336	Lynx
	97.0	99.4	2.4	8.86		LXM_3371	Lynx
including	98.1	98.5	0.4	37.8		LXM_3371	Lynx
	113.0	117.7	4.7	4.17		LXM_3359	Lynx
including	113.0	113.4	0.4	26.9		LXM_3359	Lynx
WST-21-0849	74.0	76.6	2.6	11.3		LXM_3336	Lynx
including	75.7	76.3	0.6	47.7		LXM_3336	Lynx
	96.0	98.0	2.0	29.1		LXM_3371	Lynx
including	97.2	97.6	0.4	91.9		LXM_3371	Lynx
	110.1	112.3	2.2	6.17		LXM_3359	Lynx
including	110.4	110.9	0.5	26.5		LXM_3359	Lynx
WST-21-0887	121.0	123.5	2.5	7.59		LXM_3359	Lynx
including	123.0	123.5	0.5	33.4		LXM_3359	Lynx
WST-21-0891	97.8	100.0	2.2	18.4		LXM_3371	Lynx
including	97.8	98.3	0.5	69.1		LXM_3371	Lynx
WST-21-0905	53.1	55.2	2.1	5.62		LXM_3339	Lynx
including	53.6	54.0	0.4	17.3		LXM_3339	Lynx
WST-21-0921	47.7	49.7	2.0	21.4		LXM_3303	Lynx
including	48.6	49.7	1.1	38.5		LXM_3303	Lynx
WST-21-0923	65.5	67.8	2.3	5.91		LXM_3336	Lynx
including	65.5	66.1	0.6	17.8		LXM_3336	Lynx
	98.3	100.5	2.2	7.23		LXM_3371	Lynx
including	98.3	99.1	0.8	19.5		LXM_3371	Lynx
WST-21-0941	58.8	61.1	2.3	55.1	27.3	LXM_3336	Lynx
including	59.3	59.8	0.5	228	100	LXM_3336	Lynx
WST-22-0998	200.8	205.2	4.4	8.34		MAL_5215	Mallard
including	204.0	205.2	1.2	23.8		MAL_5215	Mallard
WST-22-1010	357.5	359.7	2.2	10.4		LX4_3405	Lynx 4
including	358.0	358.4	0.4	37.0		LX4_3405	Lynx 4
WST-22-1011	200.5	202.5	2.0	84.1	67.3	TLX_3161	Triple Lynx
including	201.3	202.5	1.2	128	100	TLX_3161	Triple Lynx
WST-22-1014-W1	473.5	477.5	4.0	20.9	12.6	LX4_3404	Lynx 4
including	473.5	473.9	0.4	183	100	LX4_3404	Lynx 4
	482.3	484.4	2.1	10.1		LX4_3430	Lynx 4
including	483.8	484.4	0.6	33.3		LX4_3430	Lynx 4
WST-22-1015	183.3	185.3	2.0	4.03		MAL_5215	Mallard
including	184.4	185.0	0.6	12.6		MAL_5215	Mallard
WST-22-1016	264.6	268.3	3.7	40.8		TLX_3158	Triple Lynx
including	265.3	265.8	0.5	88.6		TLX_3158	Triple Lynx
WST-22-1018	198.8	200.9	2.1	62.4	30.0	TLX_3161	Triple Lynx
including	200.1	200.5	0.4	270	100	TLX_3161	Triple Lynx
	540.7	542.8	2.1	5.74		LX4_3404	Lynx 4
including	540.7	541.3	0.6	16.0		LX4_3404	Lynx 4
WST-22-1018-W1	540.0	542.0	2.0	6.31		LX4_3404	Lynx 4
	545.4	547.7	2.3	272	58.9	LX4_3430	Lynx 4
including	545.4	546.0	0.6	504	100
and	547.1	547.7	0.6	512	100
WST-22-1019	227.8	230.4	2.6	9.93		TLX_3131	Triple Lynx
including	228.9	229.2	0.3	64.2		TLX_3131	Triple Lynx
	395.0	397.0	2.0	38.2	15.5	LX4_3410	Lynx 4
including	396.1	396.4	0.3	251	100	LX4_3410	Lynx 4
	425.3	428.0	2.7	16.6	11.8	LX4_3409	Lynx 4
including	425.3	425.6	0.3	143	100	LX4_3409	Lynx 4
	430.0	432.0	2.0	125	15.3	LX4_3409	Lynx 4
including	431.7	432.0	0.3	833	100	LX4_3409	Lynx 4
WST-22-1020	139.0	141.4	2.4	9.86		LXM_3334	Lynx
including	139.3	139.7	0.4	23.7		LXM_3334	Lynx
	312.0	321.6	9.6	24.6	13.0	TLX_3131	Triple Lynx
including	318.4	319.4	1.0	211	100	TLX_3131	Triple Lynx
	539.8	542.0	2.2	5.75		LX4_3450	Lynx 4
including	540.3	540.6	0.3	39.3		LX4_3450	Lynx 4
WST-22-1021	281.0	285.0	4.0	46.6	40.4	TLX_3158	Triple Lynx
including	282.3	282.9	0.6	142	100	TLX_3158	Triple Lynx
	323.7	327.8	4.1	10.2		TLX_3155	Triple Lynx
including	327.4	327.8	0.4	98.9		TLX_3155	Triple Lynx
WST-22-1025	160.3	163.0	2.7	14.0		LXM_3388	Lynx
WST-22-1036	497.9	500.3	2.4	4.87		LX4_3404	Lynx 4
including	497.9	498.3	0.4	22.9		LX4_3404	Lynx 4
	513.0	515.0	2.0	11.8		LX4_3404	Lynx 4
including	514.0	514.4	0.4	41.5		LX4_3404	Lynx 4
WST-22-1051	257.0	260.0	3.0	20.6		TLX_3158	Triple Lynx
WST-22-1055	86.8	89.0	2.2	7.35		TLX_3161	Triple Lynx
including	86.8	87.1	0.3	46.0		TLX_3161	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LXM = Lynx Main, LX4 = Lynx 4, TLX = Triple Lynx and MAL = Mallard.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-22-2587-W4	1109.7	1118.6	8.9	3.65		TLX	Triple Lynx
including	1118.2	1118.6	0.4	25.0		TLX	Triple Lynx
OSK-W-22-2646-W4	1115.0	1120.6	5.6	4.00		TLX	Triple Lynx
including	1120.0	1120.6	0.6	18.1		TLX	Triple Lynx
	1125.0	1127.0	2.0	3.90		TLX	Triple Lynx
OSK-W-22-2646-W5	1169.3	1171.5	2.2	131	31.6	TLX_3172	Triple Lynx
including	1169.7	1170.3	0.6	465	100	TLX_3172	Triple Lynx
WST-21-0771C	104.2	107.0	2.8	11.4		BCT	Bobcat
including	105.0	106.0	1.0	23.7		BCT	Bobcat
WST-21-0872	74.7	76.8	2.1	8.46		LXM	Lynx
including	75.7	76.3	0.6	20.0		LXM	Lynx
WST-21-0899B	35.4	37.5	2.1	11.9		BCT	Bobcat
including	35.8	36.1	0.3	80.3		BCT	Bobcat
WST-22-1014-W1	558.0	560.2	2.2	4.02		LX4	Lynx 4
WST-22-1019	351.3	354.0	2.7	5.09		LX4_3401	Lynx 4
WST-22-1020	295.7	300.0	4.3	7.57		TLX	Triple Lynx
including	295.7	296.2	0.5	16.4		TLX	Triple Lynx
WST-22-1021	437.4	439.6	2.2	112	83.4	TLX_3172	Triple Lynx
including	438.6	439.6	1.0	164	100	TLX_3172	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., BCT = Bobcat, LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-22-2587-W3	127	-59	1221	453350	5435673	413	3850
OSK-W-22-2587-W4	127	-59	1218	453350	5435673	413	3850
OSK-W-22-2601-W4	125	-61	1098	453425	5435656	412	3900
OSK-W-22-2601-W6	125	-61	1212	453425	5435656	412	3900
OSK-W-22-2605-W2	112	-55	1431	453551	5435669	408	4025
OSK-W-22-2605-W3	112	-55	1455	453551	5435669	408	4025
OSK-W-22-2605-W4	112	-55	1425	453551	5435669	408	4025
OSK-W-22-2605-W5	112	-55	1401	453551	5435669	408	4025
OSK-W-22-2605-W6	112	-55	1404	453551	5435669	408	4025
OSK-W-22-2646-W4	109	-58	1254	453326	5435648	414	3800
OSK-W-22-2646-W5	109	-58	1245	453326	5435648	414	3800
WST-21-0713A	158	4	94	453359	5435194	84	3625
WST-21-0771C	127	-52	357	452954	5435003	252	3175
WST-21-0845	130	-29	111	453315	5435165	124	3550
WST-21-0847	134	-30	114	453315	5435165	124	3550
WST-21-0848	135	-27	129	453315	5435165	124	3550
WST-21-0849	134	-24	118	453315	5435164	124	3550
WST-21-0872	135	-69	348	453508	5435327	-7	3800
WST-21-0887	136	-33	132	453315	5435165	123	3550
WST-21-0891	138	-28	126	453314	5435164	124	3550
WST-21-0899B	134	-60	287	452955	5435004	253	3175
WST-21-0905	141	-52	64	453221	5435121	135	3450
WST-21-0921	148	-37	114	453314	5435164	124	3550
WST-21-0923	147	-31	111	453314	5435164	124	3550
WST-21-0941	153	-23	129	453315	5435164	124	3550
WST-22-0998	358	-52	230	452207	5434903	247	2475
WST-22-1010	136	-28	481	453445	5435276	-99	3725
WST-22-1011	134	-32	630	453344	5435312	-66	3650
WST-22-1014-W1	123	-37	594	453507	5435332	-47	3800
WST-22-1015	345	-60	210	452206	5434903	247	2475
WST-22-1016	143	-65	448	453647	5435347	-189	3950
WST-22-1018	115	-43	636	453506	5435327	-90	3800
WST-22-1018-W1	115	-43	585	453506	5435327	-90	3800
WST-22-1019	140	-27	463	453444	5435276	-99	3725
WST-22-1020	142	-52	582	453322	5435236	54	3600
WST-22-1021	149	-67	468	453647	5435347	-189	3950
WST-22-1025	122	-20	189	453507	5435332	-47	3800
WST-22-1036	130	-48	627	453505	5435326	-90	3800
WST-22-1051	106	-52	327	453702	5435377	-198	4000
WST-22-1055	144	-44	120	453600	5435324	-181	3950

Bobcat

Lynx Zone

Mallard

Mineralization is hosted in sheared mafic volcanics with felsic porphyritic intrusions and occurs as veins associated with sericite-pyrite ± silica ± chlorite alteration and contains pyrite ranging from trace to 30% and local visible gold.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL INFILLS AND EXPANDS WITH MORE HIGH-GRADE

Posted on May 4, 2022May 3, 2022 by lboivin

243 g/t Au Over 2.8 Metres

(Toronto, May 4, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 43 intercepts in 17 underground drill holes and 5 wedges from surface. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “May the 4^th be with you. Today’s results continue to strengthen our confidence in the high-grade nature of Windfall. While the focus for the feasibility study remains on the Lynx areas, other areas such as Mallard, also continue to infill nicely and contribute high-grade ounces to the resource.”

Selected high-grade intercepts include: 243 g/t Au over 2.8 metres in WST-22-1016, 20.6 g/t Au over 9.5 metres in WST-22-1006-W1; 16.3 g/t Au over 7.9 metres in OSK-W-22-2587-W3; 48.4 g/t Au over 2.1 metres in WST-22-1003A; 37.9 g/t Au over 2.1 metres in WST-22-1010; 36.8 g/t Au over 2.1 metres in WST-21-0940; 38.2 g/t Au over 2.0 metres in OSK-W-21-2601-W2, 37.1 g/t Au over 2.0 meters in WST-21-0991, and 36.1 g/t Au over 2.0 metres in WST-22-1006-W2. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_In EN 20220504, Long Section_Ex EN 20220504, PR_EN_20220504_Surface, PR_EN_20220504_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2605-W1	1352.7	1355.1	2.4	7.53		LX4_3445	Lynx 4
including	1352.7	1353.0	0.3	19.4		LX4_3445	Lynx 4
OSK-W-22-2587-W3	1047.6	1055.5	7.9	16.3		TLX_3158	Lynx HW
including	1052.0	1053.0	1.0	39.9		TLX_3158	Lynx HW
WST-21-0708	522.3	524.4	2.1	22.9		LX4_3401	Lynx 4
including	522.3	523.0	0.7	68.4		LX4_3401	Lynx 4
WST-21-0892	70.0	72.1	2.1	8.41		LXM_3336	Lynx
	111.1	113.6	2.5	15.7		LXM_3359	Lynx
including	112.8	113.3	0.5	48.5		LXM_3359	Lynx
WST-21-0926	61.9	64.0	2.1	18.9		LXM_3336	Lynx
including	61.9	62.4	0.5	74.2		LXM_3336	Lynx
WST-21-0938	96.0	98.0	2.0	8.39		LXM_3371	Lynx
including	96.3	96.7	0.4	41.4		LXM_3371	Lynx
WST-21-0939A	60.3	62.5	2.2	3.81		LXM_3336	Lynx
including	60.3	60.7	0.4	17.4		LXM_3336	Lynx
WST-21-0939A	96.5	99.0	2.5	11.7		LXM_3371	Lynx
including	97.4	98.1	0.7	41.5		LXM_3371	Lynx
WST-21-0942	95.0	97.0	2.0	28.7	15.6	LXM_3371	Lynx
including	95.5	95.8	0.3	188	100	LXM_3371	Lynx
WST-21-0991	173.0	175.0	2.0	37.1	30.0	LHW_3206	Lynx
including	174.4	175.0	0.6	124	100	LHW_3206	Lynx
WST-22-1006-W1	505.5	515.0	9.5	20.6	14.8	LX4_3404	Lynx 4
including	505.5	505.8	0.3	89.6
and	507.1	507.5	0.4	240	100
and	509.1	509.4	0.3	92.8
	560.9	563.0	2.1	8.21		LX4_3430	Lynx 4
including	560.9	561.3	0.4	41.2		LX4_3430	Lynx 4
WST-22-1006-W2	519.4	521.4	2.0	4.30		LX4_3404	Lynx 4
including	519.4	519.8	0.4	17.6		LX4_3404	Lynx 4
	523.3	527.0	3.7	3.93		LX4_3404	Lynx 4
including	523.3	524.1	0.8	8.29		LX4_3404	Lynx 4
	582.0	584.0	2.0	36.1	30.4	LX4_3430	Lynx 4
including	582.0	582.6	0.6	119	100	LX4_3430	Lynx 4
WST-22-1003A	78.0	80.1	2.1	48.4	33.5	MAL_5219	Mallard
including	78.5	79.2	0.7	145	100	MAL_5219	Mallard
WST-22-1010	400.0	402.2	2.2	3.62		LX4_3410	Lynx 4
	406.0	408.0	2.0	4.35		LX4_3440	Lynx 4
WST-22-1012	529.0	531.3	2.3	12.5		LX4_3450	Lynx 4
including	529.6	530.4	0.8	35.5		LX4_3450	Lynx 4
WST-22-1013	147.3	152.5	5.2	9.62		TLX_3161	Triple Lynx
including	151.2	151.7	0.5	24.6		TLX_3161	Triple Lynx
	206.5	212.8	6.3	3.54		TLX_3164	Triple Lynx
including	206.5	207.1	0.6	12.5
and	212.1	212.8	0.7	9.90
WST-22-1014	463.1	465.1	2.0	4.56		LX4_3430	Lynx 4
including	463.6	463.9	0.3	21.4		LX4_3430	Lynx 4
	489.7	493.3	3.6	4.30		LX4_3461	Lynx 4
	516.6	519.0	2.4	9.53		LX4_3443	Lynx 4
including	516.6	517.0	0.4	25.6		LX4_3443	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. MAL = Mallard, LXM = Lynx Main, LX4 = Lynx 4, LHW = Lynx Hanging wall, and TLX = Triple Lynx.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2601-W2	1296.2	1298.2	2.0	38.2		LX4	Lynx 4
including	1296.6	1297.2	0.6	100		LX4	Lynx 4
OSK-W-22-2605-W2	1329.8	1335.0	5.2	6.56		LX4_3462	Lynx 4
including	1331.7	1332.3	0.6	28.9		LX4_3462	Lynx 4
	1374.0	1376.0	2.0	10.7		LX4_3445	Lynx 4
	1407.3	1409.9	2.6	17.4		LX4	Lynx 4
including	1408.5	1409.4	0.9	46.9		LX4	Lynx 4
OSK-W-22-2605-W3	1433.9	1436.3	2.4	4.74		LX4	Lynx 4
WST-21-0939A	113.8	115.8	2.0	13.1		LXM_3359	Lynx
including	113.8	114.5	0.7	30.1		LXM_3359	Lynx
WST-21-0940	111.0	113.1	2.1	36.8	30.9	LXM_3359	Lynx
including	112.5	113.1	0.6	121	100	LXM_3359	Lynx
WST-21-0941	115.2	117.3	2.1	14.4		LXM_3359	Lynx
including	115.2	115.6	0.4	75.1		LXM_3359	Lynx
WST-21-0946	175.0	177.2	2.2	26.0	18.3	TLX_3161	Triple Lynx
including	176.8	177.2	0.4	143	100	TLX_3161	Triple Lynx
WST-22-1003A	95.4	97.5	2.1	9.97		MAL	Mallard
including	97.1	97.5	0.4	34.9		MAL	Mallard
	166.1	169.6	3.5	8.29		MAL	Mallard
including	168.7	169.6	0.9	25.4		MAL	Mallard
WST-22-1006-W1	434.8	437.4	2.6	13.6		LX4	Lynx 4
including	434.8	436.0	1.2	29.0		LX4	Lynx 4
WST-22-1010	387.9	390.0	2.1	37.9		LX4	Lynx 4
including	387.9	388.8	0.9	87.7		LX4	Lynx 4
WST-22-1011	343.5	345.5	2.0	3.65		TLX	Triple Lynx
including	343.8	344.1	0.3	13.8		TLX	Triple Lynx
WST-22-1014	254.7	257.7	3.0	3.89		LHW_3224	Lynx HW
	318.8	322.0	3.2	4.38		LXM	Lynx
WST-22-1016	174.0	177.3	3.3	4.92		TLX	Triple Lynx
including	176.6	177.3	0.7	15.3		TLX	Triple Lynx
	195.2	198.0	2.8	243	41.4	TLX	Triple Lynx
including	195.7	196.0	0.3	1495	100	TLX	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., MAL = Mallard, LXM = Lynx Main, LX4 = Lynx 4, LHW = Lynx Hanging wall, and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-2601-W2	125	-61	1500	453425	5435656	412	3900
OSK-W-21-2605-W1	112	-55	1380	453551	5435669	408	4025
OSK-W-22-2587-W3	127	-59	1221	453350	5435673	413	3850
OSK-W-22-2605-W2	112	-55	1431	453551	5435669	408	4025
OSK-W-22-2605-W3	112	-55	1455	453551	5435669	408	4025
WST-21-0708	134	-40	670	453374	5435296	-26	3675
WST-21-0892	138	-25	116	453314	5435164	124	3550
WST-21-0926	149	-27	111	453314	5435164	124	3550
WST-21-0938	146	-22	106	453314	5435164	124	3550
WST-21-0939A	150	-24	129	453315	5435164	124	3550
WST-21-0940	148	-21	127	453315	5435165	125	3550
WST-21-0941	153	-23	129	453315	5435164	124	3550
WST-21-0942	148	-20	126	453315	5435164	124	3550
WST-21-0946	168	-51	403	453507	5435327	-7	3800
WST-21-0991	134	-29	391	453461	5435326	32	3775
WST-22-1003A	355	-57	213	452206	5434903	247	2475
WST-22-1006-W1	121	-45	628	453506	5435326	-90	3800
WST-22-1006-W2	121	-45	628	453506	5435326	-90	3800
WST-22-1010	136	-28	481	453445	5435276	-99	3725
WST-22-1011	134	-32	630	453344	5435312	-66	3650
WST-22-1012	141	-50	579	453322	5435236	54	3600
WST-22-1013	142	-44	420	453360	5435297	-149	3675
WST-22-1014	123	-37	540	453507	5435332	-47	3800
WST-22-1016	143	-65	448	453647	5435347	-189	3950

Lynx Zone

Mallard

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL DRILLING INTERCEPTS MORE HIGH-GRADE

Posted on April 13, 2022April 12, 2022 by lboivin

Including 120 g/t Au Over 6.2 Metres

(Toronto, April 13, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 31 intercepts in 12 underground drill holes and 5 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “We remain very pleased with the results of our infill and expansion drill program at Lynx. High grade zones continue to be intersected where expected and the expansion drilling continues to define additional zones nearby.”

Selected high-grade intercepts include: 120 g/t Au over 6.2 metres in OSK-W-21-2287-W14; 67.1 g/t Au over 4.4 metres in OSK-W-22-2646-W3; 111 g/t Au over 2.5 metres in WST-22-1009A; 82.6 g/t Au over 2.2 metres in WST-21-0997; 76.0 g/t Au over 2.3 metres in WST-21-0974; 63.9 g/t Au over 2.1 metres in WST-22-0999 and 60.8 g/t Au over 2.2 metres in OSK-W-22-2540-W13. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_Infill EN 20220413, Long Section_Expan EN 20220413, PR_EN_20220413_Surface, PR_EN_20220413_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2287-W14	1253.0	1259.2	6.2	120	51.4	LX4_3449	Lynx 4
including	1256.7	1257.2	0.5	768	100	LX4_3449	Lynx 4
OSK-W-22-2646-W3	1057.6	1062.5	4.9	15.6		TLX_3158	Triple Lynx
including	1058.3	1058.7	0.4	99.1		TLX_3158	Triple Lynx
WST-21-0839	512.0	514.0	2.0	5.16		LX4_3470	Lynx 4
including	512.3	512.7	0.4	21.9		LX4_3470	Lynx 4
WST-21-0974	44.0	46.3	2.3	76.0	31.8	TLX_3161	Triple Lynx
including	45.2	45.9	0.7	245	100	TLX_3161	Triple Lynx
WST-21-0979	189.4	194.8	5.4	15.6	12.9	TLX_3154	Triple Lynx
including	192.0	192.5	0.5	130	100	TLX_3154	Triple Lynx
	197.1	199.2	2.1	19.3		TLX_3184	Triple Lynx
including	197.4	197.7	0.3	44.4		TLX_3184	Triple Lynx
WST-21-0980	602.8	605.0	2.2	50.3	31.9	LX4_3448	Lynx 4
including	602.8	603.5	0.7	158	100	LX4_3448	Lynx 4
WST-21-0997	191.1	193.3	2.2	82.6	44.7	TLX_3121	Triple Lynx
including	191.7	192.4	0.7	219	100	TLX_3121	Triple Lynx
WST-22-0999	227.0	229.0	2.0	9.37		TLX_3131	Triple Lynx
including	227.7	228.5	0.8	23.4		TLX_3131	Triple Lynx
	351.0	353.1	2.1	4.13		LX4_3405	Lynx 4
including	352.7	353.1	0.4	20.8		LX4_3405	Lynx 4
	376.9	379.0	2.1	63.9	38.8	LX4_3410	Lynx 4
including	377.2	378.0	0.8	166	100	LX4_3410	Lynx 4
	390.5	394.0	3.5	27.4		LX4_3440	Lynx 4
including	393.0	394.0	1.0	76.3		LX4_3440	Lynx 4
WST-22-1000	202.3	212.0	9.7	3.83		TLX_3145	Triple Lynx
including	204.0	205.2	1.2	11.7		TLX_3145	Triple Lynx
WST-22-1004	320.5	325.3	4.8	5.78		TLX_3131	Triple Lynx
including	324.5	324.8	0.3	18.1		TLX_3131	Triple Lynx
	504.0	506.0	2.0	44.7	25.4	LX4_3402	Lynx 4
including	505.5	506.0	0.5	177	100	LX4_3402	Lynx 4
WST-22-1005	149.2	157.6	8.4	4.96		TLX_3161	Triple Lynx
WST-22-1006	566.7	569.1	2.4	15.1		LX4_3430	Lynx 4
including	566.7	567.0	0.3	89.3		LX4_3430	Lynx 4
WST-22-1008	147.8	150.0	2.2	8.76		TLX_3161	Triple Lynx
	210.0	212.1	2.1	11.0		TLX_3169	Triple Lynx
	217.7	220.0	2.3	3.98		TLX_3175	Triple Lynx
	226.0	228.0	2.0	5.42		TLX_3175	Triple Lynx
WST-22-1009A	172.0	174.0	2.0	8.64		LXM_3388	Lynx
including	172.8	173.3	0.5	22.9		LXM_3388	Lynx
	485.5	488.0	2.5	111	60.3	LX4_3404	Lynx 4
including	485.5	486.1	0.6	240	100	LX4_3404	Lynx 4
	499.0	501.1	2.1	11.7		LX4_3430	Lynx 4
including	499.9	500.6	0.7	32.8		LX4_3430	Lynx 4
	511.0	513.0	2.0	3.52		LX4_3454	Lynx 4
including	511.9	512.3	0.4	14.9		LX4_3454	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2381-W3	1204.2	1210.7	6.5	4.41		TLX_3172	Triple Lynx
including	1209.7	1210.7	1.0	15.6		TLX_3172	Triple Lynx
OSK-W-21-2646-W1	1046.0	1055.4	9.4	11.6		TLX_3158	Triple Lynx
including	1048.4	1048.7	0.3	65.8
and	1054.5	1055.4	0.9	54.7
OSK-W-22-2540-W13	987.8	990.0	2.2	60.8	24.2	TLX_3158	Triple Lynx
including	988.1	988.6	0.5	261	100	TLX_3158	Triple Lynx
OSK-W-22-2646-W3	1181.7	1186.1	4.4	67.1	31.7	TLX_3172	Triple Lynx
including	1184.9	1186.1	1.2	230	100	TLX_3172	Triple Lynx
WST-22-1008	249.0	251.5	2.5	5.05		TLX	Triple Lynx
WST-22-1009A	576.1	578.3	2.2	3.54		LX4	Lynx 4
including	577.5	578.3	0.8	9.57		LX4	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-2287-W14	116	-53	1338	453607	5435714	404	4075
OSK-W-21-2381-W3	134	-53	1392	453620	5435790	402	4125
OSK-W-21-2646-W1	109	-58	1236	453326	5435648	414	3800
OSK-W-22-2540-W13	117	-60	1220	453466	5435639	410	3925
OSK-W-22-2646-W3	109	-58	1251	453326	5435648	414	3800
WST-21-0839	140	-38	577	453321	5435235	55	3600
WST-21-0974	142	-11	67	453441	5435223	-157	3700
WST-21-0979	178	-55	255	453358	5435296	-149	3675
WST-21-0980	131	-38	681	453374	5435297	-26	3675
WST-21-0997	119	-45	640	453506	5435326	-90	3800
WST-22-0999	134	-26	454	453445	5435276	-99	3725
WST-22-1000	139	-45	447	453360	5435297	-148	3675
WST-22-1004	137	-40	600	453322	5435236	54	3600
WST-22-1005	145	-44	334	453360	5435297	-148	3675
WST-22-1006	121	-45	616	453506	5435326	-90	3800
WST-22-1008	148	-42	420	453360	5435297	-148	3675
WST-22-1009A	120	-40	603	453507	5435332	-47	3800

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres in thickness. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL DRILLING INTERCEPTS WIDE HIGH-GRADE IN LYNX

Posted on March 29, 2022March 28, 2022 by lboivin

58.9 g/t Au Over 14.7 Metres

(Toronto, March 29, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 27 intercepts in 8 drill holes (1 from surface, 8 from underground) and 8 wedges. Infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). Expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “The infill program at Windfall continues to intercept high-grade mineralization. Today’s wide headline hole comes from Triple Lynx wireframe 3161 which has another wide zone of 41.4 g/t Au over 9.0 metres. Infill at Underdog is also returning intercepts of over one ounce per tonne over more than two meters.”

Selected high-grade intercepts include: 58.9 g/t Au over 14.7 metres in WST-21-0996A; 41.4 g/t Au over 9.0 metres in WST-21-0928; 88.0 g/t Au over 3.0 metres in WST-21-0997; 49.8 g/t Au over 3.9 metres in WST-21-0914; 81.5 g/t Au over 2.0 metres in WST-21-0936A; and 60.0 g/t Au over 2.4 metres in OSK-W-21-2463-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_In EN 20220329, PR_EN_20220329_Surface, PR_EN_20220329_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-1871-W3	816.3	820.7	4.4	22.6		UDD_4101	Underdog
including	816.3	817.0	0.7	86.0
and	820.2	820.7	0.5	60.6
OSK-W-21-2463-W3	971.5	973.9	2.4	60.0	47.1	UDD_4122	Underdog
including	972.8	973.9	1.1	128	100	UDD_4122	Underdog
OSK-W-21-2544-W1	791.7	794.0	2.3	4.13		TLX_3184	Triple Lynx
including	791.7	792.0	0.3	11.6		TLX_3184	Triple Lynx
	797.7	800.0	2.3	12.2		TLX_3159	Lynx HW
including	798.3	798.9	0.6	45.3		TLX_3159	Lynx HW
OSK-W-21-2599	702.8	705.8	3.0	4.83		CA2_2208	Caribou
including	702.8	703.5	0.7	16.6		CA2_2208	Caribou
WST-21-0914	250.1	254.0	3.9	49.8	46.3	LSW_3500	Lynx SW
including	250.1	250.4	0.3	146	100	LSW_3500	Lynx SW
WST-21-0928	273.1	282.1	9.0	41.4	33.0	TLX_3161	Triple Lynx
including	275.8	277.1	1.3	155	96.5	TLX_3161	Triple Lynx
WST-21-0936A	527.0	529.0	2.0	81.5	25.2	LX4_3450	Lynx 4
including	527.8	528.3	0.5	325	100	LX4_3450	Lynx 4
WST-21-0996A	146.3	161.0	14.7	58.9	32.2	TLX_3161	Triple Lynx
including	150.6	151.3	0.7	650	100	TLX_3161	Triple Lynx
WST-21-0997	589.0	592.0	3.0	88.0	43.0	LX4_3430	Lynx 4
including	589.7	590.7	1.0	235	100	LX4_3430	Lynx 4
WST-22-1000	166.0	168.1	2.1	5.82		TLX_3163	Triple Lynx
including	167.2	167.7	0.5	22.1		TLX_3163	Triple Lynx
	232.8	235.0	2.2	5.09		TLX_3169	Triple Lynx
	256.4	258.6	2.2	4.43		TLX_3175	Triple Lynx
including	256.4	256.9	0.5	18.1		TLX_3175	Triple Lynx
	372.3	374.5	2.2	4.03		TLX_3191	Triple Lynx
including	373.7	374.5	0.8	9.19		TLX_3191	Triple Lynx
WST-22-1001	503.4	506.3	2.9	6.60		LX4_3404	Lynx 4
including	505.5	505.8	0.3	19.5		LX4_3404	Lynx 4
WST-22-1006	186.8	189.0	2.2	35.6	14.8	TLX_3121	Triple Lynx
including	186.8	187.1	0.3	252	100	TLX_3121	Triple Lynx
	512.0	518.3	6.3	9.22		LX4_3404	Lynx 4
including	512.3	513.5	1.2	25.7
and	517.8	518.3	0.5	39.4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. CA2= Caribou 2, LX4 = Lynx 4, LSW = Lynx Southwest, TLX = Triple Lynx and UDD=Underdog.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2540-W3	1280.0	1282.0	2.0	17.7		LX4	Lynx 4
including	1281.4	1282.0	0.6	58.6		LX4	Lynx 4
OSK-W-21-2540-W9	1192.0	1194.0	2.0	3.68		LX4	Lynx 4
	1202.0	1208.0	6.0	7.68		LX4	Lynx 4
including	1207.0	1208.0	1.0	32.9		LX4	Lynx 4
	1230.0	1232.0	2.0	15.3		LX4	Lynx 4
	1282.7	1287.8	5.1	4.94		LX4	Lynx 4
including	1287.0	1287.8	0.8	19.3		LX4	Lynx 4
OSK-W-21-2646-W1	1067.0	1070.0	3.0	3.95		TLX	Triple Lynx
OSK-W-22-2540-W12	867.4	869.5	2.1	6.29		LNX	Lynx
including	868.4	868.7	0.3	39.5		LNX	Lynx
OSK-W-22-2540-W13	879.5	881.8	2.3	7.40		LNX	Lynx
including	879.5	880.4	0.9	18.8		LNX	Lynx
	940.0	942.0	2.0	6.01		TLX	Triple Lynx
including	940.0	940.5	0.5	23.3		TLX	Triple Lynx
WST-22-1006	609.0	611.1	2.1	8.40		LX4	Lynx 4
including	609.9	610.6	0.7	24.8		LX4	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LNX = Lynx, LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1871-W3	331	-56	906	452496	5434397	402	2475
OSK-W-21-2463-W3	339	-65	1299	452617	5434447	402	2600
OSK-W-21-2540-W3	117	-60	1470	453465	5435640	410	3925
OSK-W-21-2540-W9	117	-60	1349	453465	5435640	410	3925
OSK-W-21-2544-W1	128	-50	1140	452960	5435539	419	3425
OSK-W-21-2599	328	-62	774	452787	5434526	397	2800
OSK-W-21-2646-W1	109	-58	1236	453326	5435648	413	3800
OSK-W-22-2540-W12	117	-60	885	453465	5435640	410	3925
OSK-W-22-2540-W13	117	-60	911	453465	5435640	410	3925
WST-21-0914	148	-59	502	453105	5435066	231	3325
WST-21-0928	154	-70	391	453507	5435327	-7	3800
WST-21-0936A	137	-48	570	453257	5435209	96	3525
WST-21-0996A	143	-45	427	453358	5435297	-149	3675
WST-21-0997	119	-45	640	453506	5435326	-90	3800
WST-22-1000	139	-45	447	453359	5435297	-149	3675
WST-22-1001	124	-46	637	453506	5435326	-90	3800
WST-22-1006	122	-45	610	453506	5435326	-90	3800

Caribou Zone

Mineralization most commonly occurs in gold-bearing pyrite stockworks as well as semi-massive pyrite replacement zones associated with phyllic alteration (sericite-pyrite ± silica) with sulphides, pyrite dominated with minor chalcopyrite and sphalerite ranging from trace to up to 20%, and local visible gold. Mineralization is hosted in rhyolites or mafic-intermediate volcanics frequently at or near faults or the contact with felsic porphyritic intrusions.

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres in thickness. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

Underdog

Mineralization most commonly occurs in gold-bearing quartz-pyrite (± tourmaline) veins and as disseminated, stringer, semi-massive to massive pyrite with minor sphalerite, chalcopyrite and molybdenite associated with strong sericite and silica alteration. Mineralization is hosted along the intrusive contacts of a three-phase composite felsic porphyritic unit which cross-cuts felsic and mafic volcanic sequences.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL DRILLING DISCOVERS NEW GOLD ZONE NEAR LYNX 4

Posted on March 23, 2022March 22, 2022 by lboivin

60.7 g/t Au Over 5.0 Metres

(Toronto, March 23, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Expansion drilling in the Lynx 4 area has defined a new sub-vertical zone located 80 metres south-west of wireframe LX4-3449 and 150 metres under wireframe LX4-3451. The new mineralization is currently defined by 18 intercepts (13 new intercepts and five holes previously reported, results presented below) over an area measuring 200 metres x 300 metres and remains open for expansion in several directions. High-grade mineralization typical of the Lynx area defines the new zone with disseminated pyrite associated with strong pervasive silica alteration hosted in a sericitized rhyolite. This new zone is located outside the January 2022 mineral resource estimate (see Osisko news release dated January 10, 2022), and with continued definition drilling will result in a new resource wireframe.

Osisko Chief Executive Officer John Burzynski commented: “The expansion program at Windfall continues to pay dividends as illustrated by today’s announcement of a new zone outside our current resources. These results confirm how prolific the Lynx area is with respect to resource growth. We will continue to selectively target open areas where previous holes highlight strong potential for additional ounces.”

Selected high-grade intercepts include: 60.7 g/t Au over 5.0 metres in OSK-W-21-2601; 76.4 g/t Au over 3.6 metres in OSK-W-21-2540-W3; and 30.5 g/t Au over 2.0 metres in OSK-W-21-2369-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_LX4 EN New Zone_20220323, Long Section_LX4 EN Ext_20220323, PR_EN_20220323_Lynx4-New Zone.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Corridor
OSK-W-21-1949-W14	1307.1	1313.0	5.9	3.57		Lynx 4
including	1311.6	1311.9	0.3	11.6		Lynx 4
OSK-W-21-2369-W3	1261.8	1264.5	2.7	5.16		Lynx 4
	1267.0	1269.0	2.0	30.5	24.9	Lynx 4
including	1268.1	1268.4	0.3	137	100	Lynx 4
OSK-W-21-2540-W3	1409.4	1413.0	3.6	76.4	24.2	Lynx 4
including	1409.4	1410.1	0.7	368	100	Lynx 4
	1416.3	1419.0	2.7	7.02		Lynx 4
	1420.8	1423.0	2.2	5.80		Lynx 4
OSK-W-21-2540-W6	1361.8	1364.0	2.2	4.74		Lynx 4
including	1361.8	1362.3	0.5	20.6		Lynx 4
	1409.0	1411.0	2.0	20.6		Lynx 4
including	1409.3	1409.8	0.5	76.6		Lynx 4
	1480.0	1483.0	3.0	4.25		Lynx 4
including	1482.5	1483.0	0.5	11.8		Lynx 4
	1490.2	1495.0	4.8	5.84		Lynx 4
OSK-W-21-2601	1328.1	1332.0	3.9	5.30		Lynx 4
	1426.5	1431.5	5.0	60.7	45.6	Lynx 4
including	1426.5	1426.8	0.3	282	100	Lynx 4
	1459.0	1461.0	2.0	7.39		Lynx 4
including	1459.6	1460.0	0.4	36.3		Lynx 4
OSK-W-21-2369-W3*	1215.9	1218.0	2.1	5.17		Lynx 4
	1223.7	1226.1	2.4	15.5		Lynx 4
OSK-W-20-2170-W6**	1367.8	1370.0	2.2	6.61		Lynx 4
	1379.0	1381.0	2.0	14.5
	1384.0	1386.4	2.4	6.70

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. *Results previously released on April 27, 2021, **results previously released on January 11, 2021, and October 7, 2020.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1949-W14	105	-57	1332	453440	5435479	401	3825
OSK-W-21-2369-W3	130	-56	1415	453424	5435566	410	3850
OSK-W-21-2540-W3	117	-60	1470	453465	5435640	410	3925
OSK-W-21-2540-W6	117	-60	1541	453465	5435640	410	3925
OSK-W-21-2601	125	-61	1500	453425	5435657	413	3900

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres in thickness. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and can locally be hosted along the gabbro-rhyolite contact.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

OSISKO WINDFALL DRILLING INTERCEPT HIGH GRADE IN LYNX

Posted on March 16, 2022March 15, 2022 by lboivin

431 g/t Au over 4.7 metres

(Toronto, March 16, 2022) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 50 intercepts in 27 drill holes (2 from surface, 25 from underground) and 8 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “The Lynx infill and expansion drill programs continue to impress with respect to both high-grade and width. A third of today’s intercepts are greater than an ounce per ton gold and a third are greater than five meters in length. Drilling at Windfall remains focused on Lynx and other strategic areas.”

Selected high-grade intercepts include: 431 g/t Au over 4.7 metres and 32.6 g/t Au over 3.4 metres in WST-21-0929B; 187 g/t Au over 5.4 metres in OSK-W-21-2601-W1; 103 g/t Au over 6.6 metres in WST-21-0907; 65.5 g/t Au over 7.4 metres in OSK-W-21-2605-W1; 45.2 g/t Au over 8.5 metres in WST-21-0934; 22.1 g/t Au over 12.0 metres in OSK-W-21-2613-W1; 116 g/t Au over 2.1 metres in WST-21-0994; 36.0 g/t Au over 6.4 metres in OSK-W-21-1949-W16; 42.1 g/t Au over 5.2 metres in WST-21-0689A and 23.9 g/t Au over 5.6 metres in OSK-W-21-2381-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_All zones In EN 20220316, Long Section_All zones Ex EN 20220316, PR_EN_20220316_Surface, PR_EN_20220316_UG.

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-1949-W16	624.7	631.1	6.4	36.0	22.6	LXM_3388	Lynx
including	629.6	630.0	0.4	298	100
and	630.0	630.4	0.4	116	100
OSK-W-21-2287-W12	1200.3	1202.5	2.2	14.3		LX4_3449	Lynx 4
including	1200.3	1201.2	0.9	31.8		LX4_3449	Lynx 4
OSK-W-21-2564-W1	742.0	744.1	2.1	33.9	25.9	TLX_3171	Triple Lynx
including	742.7	743.2	0.5	134	100	TLX_3171	Triple Lynx
OSK-W-21-2605	1304.0	1306.0	2.0	7.18		LX4_3445	Lynx 4
OSK-W-21-2605-W1	1295.7	1303.1	7.4	65.5	25.0	LX4_3449	Lynx 4
including	1296.4	1296.8	0.4	754	100
and	1296.8	1297.7	0.9	142	100
OSK-W-21-2613-W1	980.0	982.9	2.9	7.04		TLX_3161	Triple Lynx
including	981.8	982.9	1.1	14.6		TLX_3161	Triple Lynx
	1116.0	1128.0	12.0	22.1	19.9	TLX_3160	Triple Lynx
including	1118.2	1119.0	0.8	132	100
and	1127.0	1128.0	1.0	68.0
	1131.0	1133.0	2.0	5.13		TLX_3160	Triple Lynx
WST-21-0689A	217.8	223.0	5.2	42.1	24.7	TLX_3161	Triple Lynx
including	220.0	220.5	0.5	281	100	TLX_3161	Triple Lynx
WST-21-0713	26.7	33.0	6.3	5.34		LXM_3303	Lynx
including	32.1	33.0	0.9	18.3		LXM_3303	Lynx
WST-21-0877	328.5	331.0	2.5	7.63		LSW_3556	Lynx SW
including	329.2	329.5	0.3	56.5		LSW_3556	Lynx SW
WST-21-0907	527.7	534.3	6.6	103	32.4	LX4_3401	Lynx 4
including	530.4	531.4	1.0	565	100	LX4_3401	Lynx 4
WST-21-0929B	550.4	553.8	3.4	32.6	12.7	LX4_3404	Lynx 4
including	553.0	553.3	0.3	326	100	LX4_3404	Lynx 4
	564.8	569.5	4.7	431	62.6	LX4_3430	Lynx 4
including	564.8	565.6	0.8	293	100
and	565.6	566.4	0.8	2010	100
and	567.0	568.0	1.0	147	100
WST-21-0933A	331.0	333.5	2.5	4.76		TLX_3166	Triple Lynx
	498.4	500.4	2.0	31.2	25.2	LX4_3450	Lynx 4
including	499.0	499.3	0.3	140	100	LX4_3450	Lynx 4
WST-21-0934	481.1	489.6	8.5	45.2	22.9	LX4_3430	Lynx 4
including	483.6	484.5	0.9	236	100
and	485.9	486.2	0.3	323	100
WST-21-0948	504.6	506.8	2.2	27.9	23.1	LX4_3409	Lynx 4
including	504.6	504.9	0.3	136	100	LX4_3409	Lynx 4
WST-21-0956	244.6	246.6	2.0	41.9		TLX_3121	Triple Lynx
	251.0	253.3	2.3	40.5		TLX_3121	Triple Lynx
including	252.0	252.5	0.5	96.7		TLX_3121	Triple Lynx
WST-21-0961	199.0	201.1	2.1	17.8		TLX_3161	Triple Lynx
including	199.7	200.4	0.7	52.1		TLX_3161	Triple Lynx
WST-21-0964	484.0	486.0	2.0	3.87		LX4_3401	Lynx 4
WST-21-0967	219.5	221.8	2.3	9.91		TLX_3161	Triple Lynx
including	220.1	220.6	0.5	45.4		TLX_3161	Triple Lynx
WST-21-0970	466.4	468.4	2.0	9.06		LX4_3430	Lynx 4
including	468.1	468.4	0.3	57.5		LX4_3430	Lynx 4
	476.0	478.3	2.3	6.34		LX4_3444	Lynx 4
including	476.7	477.0	0.3	22.2		LX4_3444	Lynx 4
WST-21-0978A	315.4	317.6	2.2	20.4		TLX_3131	Triple Lynx
including	316.2	316.6	0.4	98.4		TLX_3131	Triple Lynx
WST-21-0981	178.7	181.1	2.4	20.9		TLX_3161	Triple Lynx
including	178.7	179.0	0.3	65.7		TLX_3161	Triple Lynx
WST-21-0991	328.0	330.0	2.0	40.5	35.8	LHW_3212	Lynx HW
including	328.5	329.2	0.7	114	100	LHW_3212	Lynx HW
WST-21-0994	181.3	183.4	2.1	116	40.7	TLX_3184	Triple Lynx
including	181.9	182.6	0.7	325	100	TLX_3184	Triple Lynx
WST-21-0995	25.7	27.8	2.1	5.57		TLX_3161	Triple Lynx
	30.9	33.0	2.1	7.46		TLX_3161	Triple Lynx
WST-21-0996A	194.6	200.3	5.7	6.65		TLX_3164	Triple Lynx
including	198.8	199.1	0.3	47.7		TLX_3164	Triple Lynx
	225.0	231.0	6.0	4.10		TLX_3169	Triple Lynx
	381.0	383.0	2.0	4.18		TLX_3191	Triple Lynx
including	381.3	381.7	0.4	20.2		TLX_3191	Triple Lynx
WST-21-0997	555.0	557.2	2.2	9.24		LX4_3404	Lynx 4
WST-22-1000	147.3	155.5	8.2	8.26		TLX_3161	Triple Lynx
including	150.3	150.8	0.5	44.8		TLX_3161	Triple Lynx
WST-22-1002	250.0	252.0	2.0	20.7		LHW_3224	Lynx HW
including	251.0	252.0	1.0	41.4		LHW_3224	Lynx HW
	268.0	270.0	2.0	3.63		LHW_3224	Lynx HW
WST-22-1007	199.4	201.7	2.3	9.11		TLX_3161	Triple Lynx
including	199.8	200.2	0.4	29.4		TLX_3161	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. LX4 = Lynx 4, LHW = Lynx Hanging Wall, LXM = Lynx Main, LSW = Lynx Southwest and TLX = Triple Lynx.

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-21-2381-W3	919.0	921.0	2.0	4.28		TLX	Triple Lynx
	959.8	962.7	2.9	12.9		TLX	Triple Lynx
including	961.5	961.9	0.4	51.0		TLX	Triple Lynx
	997.0	1002.6	5.6	23.9		TLX_3158	Triple Lynx
including	997.0	997.4	0.4	50.6		TLX_3158	Triple Lynx
OSK-W-21-2540-W5	1134.0	1136.0	2.0	22.8		TLX	Triple Lynx
including	1134.0	1135.1	1.1	41.3		TLX	Triple Lynx
OSK-W-21-2601-W1	1004.6	1010.0	5.4	187	71.8	TLX_3158	Triple Lynx
including	1005.4	1007.8	2.4	330	100
and	1008.3	1008.6	0.3	325	100
OSK-W-21-2647	1364.0	1366.5	2.5	16.6		TLX_3172	Triple Lynx
including	1365.0	1365.6	0.6	62.4		TLX_3172	Triple Lynx
WST-21-0927	588.0	593.5	5.5	4.60		LX4	Lynx 4
including	588.0	588.7	0.7	25.6		LX4	Lynx 4
	650.3	661.0	10.7	5.79		LX4	Lynx 4
including	651.0	651.7	0.7	21.7		LX4	Lynx 4
WST-21-0970	448.9	451.4	2.5	17.4		LX4	Lynx 4
including	449.9	450.5	0.6	65.0		LX4	Lynx 4
WST-21-0992	242.1	244.2	2.1	11.8		LXM	Lynx
including	242.1	243.0	0.9	25.4		LXM	Lynx
WST-21-0996A	359.0	362.1	3.1	4.21		TLX	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1949-W16	105	-57	1014	453440	5435479	401	3825
OSK-W-21-2287-W12	116	-53	1302	453607	5435714	404	4075
OSK-W-21-2381-W3	134	-53	1392	453620	5435790	402	4125
OSK-W-21-2540-W5	117	-60	1311	453465	5435640	410	3925
OSK-W-21-2564-W1	132	-50	1152	452960	5435539	419	3425
OSK-W-21-2601-W1	125	-61	1235	453425	5435657	413	3900
OSK-W-21-2605	112	-55	1401	453552	5435669	408	4025
OSK-W-21-2605-W1	112	-55	1380	453552	5435669	408	4025
OSK-W-21-2613-W1	114	-53	1152	452981	5435549	420	3450
OSK-W-21-2647	100	-61	1215	453525	5435704	405	4000
WST-21-0689A	161	-64	397	453356	5435272	16	3650
WST-21-0713	165	4	40	453359	5435194	84	3625
WST-21-0877	158	-60	490	453105	5435065	231	3325
WST-21-0907	130	-40	701	453375	5435297	-26	3675
WST-21-0927	146	-48	751	453321	5435235	54	3600
WST-21-0929B	115	-46	771	453506	5435327	-90	3800
WST-21-0933A	131	-52	733	453222	5435121	135	3450
WST-21-0934	119	-39	583	453507	5435332	-47	3800
WST-21-0948	136	-31	583	453374	5435296	-26	3675
WST-21-0956	134	-60	301	453508	5435328	-7	3800
WST-21-0961	163	-56	390	453507	5435327	-7	3800
WST-21-0964	127	-38	684	453374	5435297	-26	3675
WST-21-0967	160	-60	271	453506	5435327	-7	3800
WST-21-0970	117	-34	519	453507	5435333	-47	3800
WST-21-0978A	146	-49	702	453508	5435327	-7	3800
WST-21-0981	174	-51	258	453358	5435296	-149	3675
WST-21-0991	134	-29	391	453461	5435326	32	3775
WST-21-0992	120	-34	499	453507	5435333	-47	3800
WST-21-0994	197	-38	231	453357	5435296	-148	3675
WST-21-0995	149	-39	148	453440	5435223	-159	3700
WST-21-0996A	143	-45	427	453358	5435297	-149	3675
WST-21-0997	119	-45	640	453506	5435326	-90	3800
WST-22-1000	139	-45	447	453359	5435297	-149	3675
WST-22-1002	122	-36	341	453507	5435332	-48	3800
WST-22-1007	142	-36	183	453345	5435313	-67	3650

Lynx Zone

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Telephone (416) 363-8653

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Category: Windfall

OSISKO WINDFALL DRILLING UPDATE: MORE HIGH-GRADE IN EXPANSION AND INFILL

Drill hole location

OSISKO FILES TECHNICAL REPORT FOR WINDFALL MINERAL RESOURCE ESTIMATE UPDATE

OSISKO DELIVERS UPDATED WINDFALL MINERAL RESOURCE ESTIMATE FOR PENDING YE2022 FEASIBILITY STUDY

OSISKO WINDFALL INFILL DRILLING ADDS WIDE HIGH-GRADE

Drill hole location

OSISKO WINDFALL DRILLING INTERCEPTS HIGH-GRADE IN MULTIPLE LYNX ZONES

Drill hole location

OSISKO WINDFALL INFILLS AND EXPANDS WITH MORE HIGH-GRADE

Drill hole location

OSISKO WINDFALL DRILLING INTERCEPTS MORE HIGH-GRADE

Drill hole location

OSISKO WINDFALL DRILLING INTERCEPTS WIDE HIGH-GRADE IN LYNX

Drill hole location

OSISKO WINDFALL DRILLING DISCOVERS NEW GOLD ZONE NEAR LYNX 4

Drill hole location

OSISKO WINDFALL DRILLING INTERCEPT HIGH GRADE IN LYNX

Drill hole location

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