Osisko Gold Group Inc 6-K, filed Oct 5, 2026

Osisko Gold Group Inc. (OGG)

6-K 2026-10-05 For: 2026-10-05

Added on October 05, 2026

About this 6-K

Osisko Gold Group Inc filed this 6-K on October 5, 2026.

Osisko Gold Group Inc. reported Lowhee Zone underground infill drilling results at its Cariboo Gold Project, including 7.28 g/t Au over 16.15 m at ~105 m vertical depth and 7.13 g/t Au over 11.60 m at ~61 m vertical depth. AI summary

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Exhibit Number		Description

99.1		Press Release dated October 5, 2026

		Osisko Gold Group Inc.
		(Registrant)


Date: October 5, 2026		/s/ Elijah Tyshynski
		Elijah Tyshynski
		Chief Financial Officer

Table 2: Underground DD collar locations, drillhole orientations, and max depths. Negative dips point down.
Drillhole ID	Mine Location	Easting (UTM Zn 10N)	Northing (UTM Zn 10N)	Elevation (m)	Dip	Azimuth	Depth (m)
BMU-26-047	L1290-ORE-000	596489	5882890	1292	33	302	123.20
BMU-26-050	L1290-ORE-000	596489	5882890	1292	28	302	126.30
BMU-26-053	L1290-ORE-000	596489	5882890	1291	22	302	132.40
BMU-26-056	L1290-ORE-000	596489	5882890	1291	16	302	112.90
BMU-26-059	L1290-ORE-000	596489	5882890	1291	10	302	103.90
BMU-26-062	L1290-ORE-000	596489	5882890	1290	3	302	96.50
BMU-26-065	L1290-ORE-000	596489	5882890	1290	-4	302	93.30
BMU-26-067	L1290-ORE-000	596489	5882890	1290	-16	302	87.40
BMU-26-069	L1290-ORE-000	596489	5882890	1290	-27	302	87.50
BMU-26-070	L1290-ORE-000	596489	5882890	1289	-38	302	96.20
BMU-26-072	L1290-ORE-000	596489	5882890	1292	33	309	96.20
BMU-26-073	L1290-ORE-000	596489	5882890	1292	28	309	111.30
BMU-26-074	L1290-ORE-000	596489	5882890	1291	22	309	120.40
BMU-26-075	L1290-ORE-000	596489	5882890	1291	16	309	118.90
BMU-26-076	L1290-ORE-000	596489	5882890	1291	10	309	114.30
BMU-26-077	L1290-ORE-000	596489	5882890	1290	3	309	113.10
BMU-26-078	L1290-ORE-000	596489	5882890	1290	-4	309	102.30
BMU-26-079	L1290-ORE-000	596489	5882890	1290	-17	309	93.40
BMU-26-080	L1290-ORE-000	596489	5882890	1289	-27	309	97.30
BMU-26-081	L1290-ORE-000	596489	5882890	1289	-38	309	105.20
BMU-26-093	L1290-ORE-000	596490	5882890	1292	33	316	81.30
BMU-26-094	L1290-ORE-000	596490	5882890	1292	28	316	81.20
BMU-26-095	L1290-ORE-000	596489	5882890	1291	22	316	87.40
BMU-26-096	L1290-ORE-000	596490	5882890	1291	17	316	150.50
BMU-26-097	L1290-ORE-000	596490	5882890	1291	10	317	137.00
BMU-26-098	L1290-ORE-000	596490	5882890	1290	3	316	122.00
BMU-26-099	L1290-ORE-000	596489	5882890	1290	-4	316	116.00
BMU-26-100	L1290-ORE-000	596489	5882891	1290	-16	316	113.00
BMU-26-101	L1290-ORE-000	596489	5882891	1289	-27	316	114.50
BMU-26-102	L1290-ORE-000	596490	5882890	1289	-38	316	111.30
BMU-26-116	L1290-ORE-000	596490	5882891	1289	-33	320	120.50
BMU-26-117	L1290-ORE-000	596490	5882891	1289	-21	320	119.00
BMU-26-118	L1290-ORE-000	596490	5882891	1290	-7	320	126.50
BMU-26-119	L1290-ORE-000	596490	5882891	1291	7	320	134.00
BMU-26-120	L1290-ORE-000	596490	5882890	1291	21	320	89.00
BMU-26-121	L1290-ORE-000	596490	5882890	1292	33	320	97.90

ABOUT OSISKO GOLD GROUP INC.
Osisko Gold Group Inc. is a North American gold development company focused on past-producing mining camps with district-scale potential. The Company's objective is to become an intermediate gold producer through the development of its flagship, fully permitted, 100%-owned Cariboo Gold Project, currently under construction in central British Columbia, Canada. The Project is situated within the Company's broader Cariboo regional land package, which hosts numerous prospective exploration targets and provides opportunities for future discoveries. Its Cariboo project pipeline is complemented by the Tintic Project, located in the historic East Tintic mining district in Utah, U.S.A., a brownfield property with significant exploration potential, extensive historical mining data, and access to established infrastructure. Osisko Gold is focused on developing long-life mining assets in mining-friendly jurisdictions while maintaining a disciplined approach to capital allocation, development risk management, and mineral inventory growth. For further information, visit our website at www.osiskogold.ca or contact:
Sean Roosen Chairman and CEO Email: sroosen@osiskogold.ca Tel: +1 (514) 940-0685	Philip Rabenok Vice President, Investor Relations Email: prabenok@osiskogold.ca Tel: +1 (437) 423-3644

Table 1: Length weighted assay composites and individual samples>=1.8 g/t for Lowhee Zone underground DD.
Drillhole ID		From (m)	To (m)	Length (m)	Au g/t	Est. True Width (m)	Approx. Vertical Depth (m)
BMU-26-047		50.10	51.10	1.00	2.32	0.82	76
	Including	50.10	50.60	0.50	4.38
		83.00	83.50	0.50	2.34	0.41	49
		89.65	96.15	6.50	4.10	4.09	40
	Including	90.15	90.65	0.50	17.25
	and	92.15	92.65	0.50	2.51
	and	92.65	93.15	0.50	14.98
	and	94.15	94.65	0.50	6.33
	and	94.65	95.15	0.50	9.18
		99.30	100.30	1.00	2.67	0.64	34
	Including	99.30	99.80	0.50	4.05
BMU-26-050		85.30	91.80	6.50	1.92	5.37	45
	Including	87.30	87.80	0.50	1.99
	and	87.80	88.40	0.60	4.43
	and	88.90	89.50	0.60	3.74
	and	89.50	90.20	0.70	8.06
		101.65	103.65	2.00	2.96	1.64	33
	Including	102.15	102.65	0.50	9.84
BMU-26-053		48.00	48.50	0.50	2.24	0.38	82
		123.00	123.50	0.50	17.80	0.43	21
BMU-26-056		11.10	11.60	0.50	1.87	0.48	113
		46.90	48.40	1.50	3.52	1.45	85
	Including	47.40	47.90	0.50	10.26
		78.80	79.30	0.50	1.92	0.33	61
BMU-26-059		11.00	11.50	0.50	2.53	0.45	114
		35.90	36.40	0.50	2.11	0.49	97
		43.50	44.00	0.50	3.42	0.46	91
		87.00	89.50	2.50	2.21	2.48	61
	Including	87.00	87.50	0.50	2.66
	and	88.50	89.00	0.50	7.90
		93.60	94.10	0.50	2.07	0.50	58
BMU-26-062		11.00	11.50	0.50	3.41	0.49	115
		42.50	44.00	1.50	2.06	1.31	96
	Including	43.00	43.50	0.50	5.68
		60.20	61.70	1.50	2.97	1.48	86
	Including	61.20	61.70	0.50	7.79
		78.50	80.50	2.00	1.98	1.34	76
	Including	80.00	80.50	0.50	7.02
		84.80	86.30	1.50	6.27	1.15	73
	Including	85.30	85.80	0.50	18.52
BMU-26-065		12.00	12.50	0.50	3.57	0.43	116
		42.00	42.50	0.50	6.51	0.50	100
		60.50	61.00	0.50	3.24	0.41	92
		63.60	64.10	0.50	7.64	0.49	91
		67.60	68.10	0.50	5.01	0.48	89
BMU-26-067		13.40	14.90	1.50	1.98	1.30	117
	Including	13.40	13.90	0.50	2.99
	and	13.90	14.40	0.50	2.73
		41.40	43.00	1.60	5.23	1.59	109
	Including	41.40	41.90	0.50	16.43
		59.40	59.90	0.50	2.99	0.50	104
		63.40	63.90	0.50	1.95	0.50	103
		73.80	74.30	0.50	6.95	0.49	101
BMU-26-069		0.00	1.00	1.00	2.12	0.97	122
		14.50	15.00	0.50	13.87	0.46	119
		39.10	39.60	0.50	21.45	0.49	116
		45.00	49.50	4.50	2.10	4.04	115
	Including	45.00	45.50	0.50	13.23
	and	48.50	49.00	0.50	4.15
		82.20	87.00	4.80	2.66	4.51	115
	Including	82.20	82.70	0.50	15.58
	and	84.45	84.95	0.50	2.13
	and	86.00	87.00	1.00	3.81
BMU-26-070		35.10	35.60	0.50	2.31	0.43	124
		48.40	48.90	0.50	6.76	0.37	126
		59.00	59.50	0.50	4.03	0.32	127
		73.40	74.00	0.60	6.88	0.49	130
		88.40	90.25	1.85	1.94	1.06	134
	Including	89.20	89.75	0.55	3.87
BMU-26-072		39.10	40.60	1.50	5.43	1.45	87
	Including	39.60	40.10	0.50	15.77
		69.50	70.50	1.00	3.09	0.64	63
	Including	69.50	70.00	0.50	6.05
BMU-26-073		37.90	39.50	1.60	9.89	1.31	90
	Including	37.90	38.40	0.50	24.86
	and	38.40	39.00	0.60	5.54
		50.65	51.30	0.65	3.16	0.56	80
BMU-26-074		36.05	37.05	1.00	2.24	0.95	93
	Including	36.55	37.05	0.50	3.92
		48.20	49.20	1.00	4.23	0.95	84
	Including	48.20	48.70	0.50	8.30
		84.20	85.20	1.00	10.13	0.87	57
	Including	84.20	84.70	0.50	19.94
		99.05	102.40	3.35	2.98	3.15	45
	Including	101.60	102.40	0.80	11.02
BMU-26-075		10.80	11.30	0.50	2.85	0.47	114
		74.80	76.90	2.10	1.97	1.67	68
	Including	75.40	75.90	0.50	2.10
	and	75.90	76.90	1.00	2.99
		79.40	91.00	11.60	7.13	11.30	61
	Including	79.90	80.40	0.50	18.85
	and	81.70	82.50	0.80	31.88
	and	83.00	83.50	0.50	62.06
	and	86.55	87.40	0.85	2.23
	and	87.40	88.25	0.85	7.13
	and	90.10	91.00	0.90	6.47
		97.00	98.00	1.00	2.18	0.91	53
	Including	97.00	97.50	0.50	4.21
BMU-26-076		72.50	81.00	8.50	9.40	7.94	72
	Including	73.75	74.25	0.50	3.06
	and	75.10	75.65	0.55	41.31
	and	75.65	76.20	0.55	3.77
	and	76.20	76.85	0.65	78.39
		91.00	94.00	3.00	2.14	2.72	61
	Including	93.00	93.50	0.50	11.15
		97.60	103.35	5.75	10.26	5.21	56
	Including	99.50	100.00	0.50	4.82
	and	100.50	101.30	0.80	60.62
	and	101.30	101.80	0.50	5.28
	and	102.85	103.35	0.50	7.84
		110.40	111.90	1.50	2.75	1.43	48
	Including	110.40	110.90	0.50	2.42
	and	110.90	111.40	0.50	5.60
		113.30	114.30	1.00	8.23	1.00	46
	Including	113.30	113.80	0.50	15.88
BMU-26-077		7.50	8.00	0.50	2.59	0.49	118
		78.10	79.15	1.05	3.56	1.05	79
	Including	78.10	78.60	0.50	3.84
	and	78.60	79.15	0.55	3.32
		81.75	82.25	0.50	1.92	0.49	77
BMU-26-078		42.00	42.50	0.50	2.25	0.50	102
		68.50	69.50	1.00	1.97	0.97	91
	Including	68.50	69.00	0.50	3.22
		86.00	89.00	3.00	3.49	2.12	84
	Including	86.00	86.50	0.50	17.99
BMU-26-079		12.70	13.70	1.00	13.56	0.71	118
	Including	13.20	13.70	0.50	26.97
		43.90	45.40	1.50	3.90	1.43	109
	Including	44.90	45.40	0.50	11.51
		63.00	63.50	0.50	6.36	0.50	105
		69.60	71.10	1.50	2.53	1.48	103
	Including	69.60	70.10	0.50	7.08
		73.10	73.60	0.50	3.49	0.47	103
		79.00	81.10	2.10	5.88	2.07	101
	Including	80.60	81.10	0.50	24.35
BMU-26-080		14.80	15.30	0.50	18.58	0.45	120
		49.40	49.90	0.50	3.38	0.43	117
		71.50	72.00	0.50	2.60	0.48	117
		82.40	85.20	2.80	1.80	2.42	118
	Including	82.90	83.80	0.90	4.40
BMU-26-081		15.80	17.10	1.30	6.20	1.06	124
	Including	16.60	17.10	0.50	15.63
		44.35	44.85	0.50	3.00	0.43	127
		46.50	47.00	0.50	3.01	0.43	127
		53.65	54.70	1.05	3.70	0.80	128
	Including	54.20	54.70	0.50	7.53
		58.60	59.10	0.50	1.81	0.38	129
		77.50	79.00	1.50	5.23	1.15	133
	Including	77.50	78.00	0.50	15.19
		80.35	80.85	0.50	3.76	0.43	134
BMU-26-093		6.00	7.00	1.00	1.87	0.87	116
		68.00	71.05	3.05	3.07	2.64	67
	Including	68.90	69.40	0.50	2.01
	and	69.40	69.95	0.55	8.82
	and	69.95	70.55	0.60	3.27
BMU-26-094		36.00	39.05	3.05	5.23	2.74	93
	Including	38.05	38.55	0.50	29.40
		41.50	42.55	1.05	2.84	0.91	89
	Including	42.00	42.55	0.55	5.00
		57.00	57.50	0.50	1.94	0.35	78
		61.00	65.70	4.70	3.84	3.23	74
	Including	62.55	63.20	0.65	18.46
	and	63.70	64.20	0.50	7.34
	and	64.70	65.20	0.50	2.51
BMU-26-095		35.90	39.40	3.50	4.54	3.29	95
	Including	37.40	37.90	0.50	29.01
		65.90	66.40	0.50	3.04	0.47	75
BMU-26-096		68.30	70.80	2.50	3.39	2.17	77
	Including	68.30	68.80	0.50	2.50
	and	68.80	69.30	0.50	13.72
		91.40	93.50	2.10	29.30	1.79	62
	Including	91.90	92.45	0.55	111.38
		119.40	119.90	0.50	1.97	0.23	42
BMU-26-097		35.75	36.25	0.50	2.00	0.49	101
		67.25	77.10	9.85	1.95	9.44	81
	Including	67.75	68.55	0.80	3.63
	and	70.80	71.70	0.90	7.62
	and	72.80	73.50	0.70	2.44
	and	74.00	74.50	0.50	3.28
	and	74.50	75.00	0.50	8.49
		88.30	89.80	1.50	2.42	1.30	71
	Including	88.80	89.30	0.50	6.94
		97.00	106.95	9.95	2.71	8.76	63
	Including	97.00	97.50	0.50	6.95
	and	98.85	99.80	0.95	19.51
	and	106.45	106.95	0.50	4.87
		111.50	114.00	2.50	1.81	2.41	57
	Including	113.00	113.50	0.50	8.56
		130.80	137.00	6.20	2.32	5.99	47
	Including	133.25	133.75	0.50	14.79
	and	134.80	135.50	0.70	2.10
	and	135.50	136.25	0.75	3.77
BMU-26-098		65.75	67.50	1.75	2.44	1.74	89
	Including	65.75	66.25	0.50	7.65
		81.00	95.35	14.35	4.04	11.51	78
	Including	89.50	90.50	1.00	29.57
	and	92.00	92.50	0.50	7.06
	and	92.50	93.50	1.00	20.35
		107.40	119.50	12.10	2.07	10.48	65
	Including	107.40	108.00	0.60	3.44
	and	110.50	111.15	0.65	5.14
	and	111.65	112.15	0.50	8.08
	and	112.90	113.40	0.50	4.50
	and	113.40	113.90	0.50	13.82
	and	114.40	115.40	1.00	2.26
	and	115.40	116.00	0.60	1.98
BMU-26-099		83.50	85.50	2.00	2.12	1.47	89
	Including	85.00	85.50	0.50	7.35
		92.20	92.85	0.65	1.92	0.59	86
		94.35	97.00	2.65	1.83	2.25	85
	Including	94.85	95.85	1.00	2.33
BMU-26-100		11.20	12.20	1.00	10.38	0.97	120
	Including	11.70	12.20	0.50	19.78
		44.90	47.00	2.10	2.04	2.07	112
	Including	44.90	45.50	0.60	5.87
		66.00	69.00	3.00	2.85	2.90	109
	Including	68.50	69.00	0.50	16.13
		76.40	77.25	0.85	2.48	0.84	108
		90.00	91.50	1.50	2.83	1.06	106
	Including	91.00	91.50	0.50	8.26
		104.65	106.50	1.85	1.87	1.82	104
	Including	104.65	105.15	0.50	5.19
BMU-26-101		14.05	16.70	2.65	2.07	2.29	122
	Including	14.70	15.20	0.50	7.87
	and	15.20	15.70	0.50	2.47
		48.10	51.90	3.80	4.85	3.20	120
	Including	51.40	51.90	0.50	34.71
		66.00	68.50	2.50	2.19	2.25	121
	Including	68.00	68.50	0.50	10.61
		73.50	74.50	1.00	2.99	0.87	121
	Including	73.50	74.00	0.50	5.89
		90.10	91.10	1.00	4.60	0.71	122
	Including	90.10	90.60	0.50	8.92
		106.00	111.00	5.00	2.24	4.05	124
	Including	106.00	106.55	0.55	1.88
	and	108.00	108.50	0.50	7.79
	and	109.00	109.50	0.50	11.12
BMU-26-102		2.70	3.30	0.60	2.95	0.41	124
		8.30	8.80	0.50	1.85	0.35	124
		9.40	10.60	1.20	1.90	0.69	124
	Including	9.40	10.10	0.70	2.15
		17.00	17.50	0.50	10.93	0.41	124
		37.10	38.10	1.00	8.37	0.77	127
	Including	37.10	37.60	0.50	16.46
		58.30	58.80	0.50	3.21	0.35	131
BMU-26-116		16.20	16.80	0.60	2.36	0.42	124
		49.50	50.05	0.55	3.03	0.39	127
		53.15	53.65	0.50	2.41	0.45	128
		68.15	69.15	1.00	8.65	0.94	130
	Including	68.65	69.15	0.50	16.99
		72.50	73.00	0.50	2.32	0.43	131
		87.60	88.10	0.50	2.01	0.43	133
		89.70	90.30	0.60	4.63	0.52	134
		110.80	113.50	2.70	3.86	2.54	139
	Including	111.30	111.80	0.50	18.27
	and	111.80	112.40	0.60	1.81
		115.55	116.05	0.50	3.61	0.47	140
		119.00	119.50	0.50	2.01	0.47	140
BMU-26-117		11.50	13.30	1.80	2.35	1.63	121
	Including	12.30	12.80	0.50	7.95
		47.40	47.90	0.50	2.69	0.43	118
		93.40	93.90	0.50	2.40	0.43	118
		104.90	106.40	1.50	4.35	1.15	119
	Including	105.40	105.90	0.50	12.04
		116.50	117.00	0.50	2.43	0.35	120
BMU-26-118		10.90	11.90	1.00	8.87	0.94	119
	Including	10.90	11.40	0.50	17.52
		77.50	78.50	1.00	2.99	1.00	99
	Including	77.50	78.00	0.50	5.89
		98.40	99.40	1.00	2.40	0.94	94
	Including	98.40	98.90	0.50	2.46
	and	98.90	99.40	0.50	2.33
		110.90	116.60	5.70	9.98	5.36	91
	Including	111.45	111.95	0.50	6.38
	and	111.95	112.55	0.60	72.45
	and	112.55	113.30	0.75	8.75
	and	113.30	113.80	0.50	3.16
BMU-26-119		34.50	35.00	0.50	4.24	0.47	104
		44.50	46.00	1.50	5.55	1.48	99
	Including	44.50	45.00	0.50	15.26
		64.00	66.00	2.00	2.40	1.81	90
	Including	64.00	64.70	0.70	6.19
		88.90	89.40	0.50	27.24	0.47	77
		100.90	105.90	5.00	2.07	4.83	69
	Including	100.90	101.40	0.50	2.18
	and	101.40	102.00	0.60	1.90
	and	102.00	102.50	0.50	8.41
	and	102.50	103.00	0.50	1.92
	and	104.00	104.50	0.50	3.21
	and	105.40	105.90	0.50	1.90
		111.20	114.25	3.05	11.17	2.34	65
	Including	111.75	112.25	0.50	50.82
	and	113.25	113.75	0.50	14.38
BMU-26-120		24.00	25.00	1.00	1.81	0.91	106
	Including	24.50	25.00	0.50	3.49
		33.30	34.70	1.40	6.97	1.21	99
	Including	33.30	34.20	0.90	10.78
		52.50	54.50	2.00	3.30	1.73	87
	Including	53.00	53.50	0.50	12.86
BMU-26-121		14.25	30.40	16.15	7.28	13.99	105
	Including	17.90	18.40	0.50	3.58
	and	18.40	19.00	0.60	173.66
	and	26.60	27.10	0.50	6.80
	and	29.90	30.40	0.50	5.39
		39.00	40.90	1.90	1.95	1.72	91
	Including	39.90	40.40	0.50	6.63
		47.90	51.00	3.10	1.98	1.99	85
	Including	48.90	49.40	0.50	5.50
	and	49.40	49.90	0.50	1.84
		52.00	53.00	1.00	1.96	0.94	82
	Including	52.50	53.00	0.50	2.79
		56.90	58.00	1.10	2.56	0.84	79
	Including	57.40	58.00	0.60	4.56