OSK Osisko Mining Inc

Osisko Mining Inc. (OSK:TSX. "Osisko" or the "Corporation") is pleased to provide an update from the ongoing drill program at its 50% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The 2023 drilling campaign primarily targeted infill areas. Since the start of the year, over 95,000 metres have been drilled by 8 underground rigs focused on the Lynx segment of the deposit.

Highlights from the 2023 drill program are presented below and include 320 intercepts from 248 drill holes and 1 wedge. These highlights are intercepts with a metal factor (grams*meters) greater than 20. The intercepts are all located within the defined mineral resource estimate ("MRE") blocks as described in Osisko's feasibility study on Windfall (see FS Technical Report (as defined herein), a copy of which is available on SEDAR+ under Osisko's issuer profile), and have targeted upgrading inferred mineral resources to measured or indicated mineral resources or indicated minerals resources to measured mineral resources as applicable.

Osisko Chief Executive Officer John Burzynski commented: "Infill drilling at the Windfall deposit is progressing well and confirming our models. High-grade gold continues to be intercepted in the Lynx areas including Triple Lynx, once again highlighting the world-class nature of the deposit. Of note, we have more than ten intervals in this set of numbers that returned values over one kilogram per tonne of gold. Infill drilling will continue into next year. We and our joint venture partner are very much looking forward to resuming exploration on our greater than 2,300 square kilometer land package around Windfall in the coming months."

Regional exploration in the Urban Barry area will recommence on near-deposit and regional grassroots targets. Exploration will include ground geophysics and diamond drilling of various targets.

Maps showing Windfall hole locations are available at www.osiskomining.com. Maps: Top_Intersect_2023, PR_Longsections_ 20231026_EN.

2023 Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone
OSK-W-23-2671	112.8	115.0	2.2	210	33	LXM
including	113.2	113.9	0.7	658	100
WST-22-1082	425.3	427.6	2.3	57.9	56.1	LX4
including	425.7	426.0	0.3	104	100
including	426.0	426.6	0.6	105	100
WST-22-1154	113.5	115.8	2.3	35.2	31.3	TLX
WST-22-1171	76.0	78.0	2.0	35.0	30.1	LXM
	81.4	84.0	2.6	39.3	21.4
including	81.4	81.7	0.3	255	100
	128.0	130.0	2.0	15.4
WST-22-1182A	526.8	528.8	2.0	99.3	54.9	TLX
including	527.6	528.4	0.8	211	100
	553.0	556.0	3.0	15.4
WST-22-1182A-W1	553.8	562.2	8.4	29.6	29.2	TLX
including	557.4	558.1	0.7	105	100
and	558.6	559.3	0.7	92.5
WST-22-1218	101.0	104.4	3.4	74.0	48	TLX
including	102.0	102.5	0.5	274	100
	235.3	238.0	2.7	223	15
including	235.8	236.1	0.3	1970	100
WST-22-1219	230.0	233.0	3.0	15.9		TLX
WST-22-1237	119.5	121.7	2.2	376	41.4	LXM
including	119.5	120.4	0.9	919	100
WST-22-1240	144.5	146.6	2.1	24.1		LXM
WST-22-1241	139.5	141.5	2.0	27.9		TLX
WST-22-1246	154.0	156.4	2.4	12.5		LXM
WST-22-1249A	296.1	298.1	2.0	204	22.3	TLX
including	296.6	297.0	0.4	1010	100
WST-22-1250	91.0	93.1	2.1	11.3		TLX
WST-22-1252	95.8	99.3	3.5	192	75	TLX
including	95.8	96.4	0.6	525	100
WST-22-1253	96.0	99.0	3.0	90.8	50.8	TLX
including	96.7	97.1	0.4	216	100
and	97.6	98.4	0.8	192	100
	216.5	218.5	2.0	12.0
WST-22-1254	95.3	98.3	3.0	154	50.5	TLX
including	97.0	98.0	1.0	410	100
	216.1	218.3	2.2	20.6		TLX
WST-22-1255	98.0	100.4	2.4	9.49		TLX
WST-22-1256	479.5	483.4	3.9	24.0	16.5	TLX
including	482.4	482.7	0.3	197	100
WST-22-1261	112.4	114.6	2.2	39.8	14.2	LXM
	178.9	181.0	2.1	19.6
WST-22-1262	138.9	141.1	2.2	22.7		TLX
WST-22-1264	126.1	128.5	2.4	23.8		TLX
WST-22-1265	135.5	137.9	2.4	13.2		TLX
WST-22-1266	133.3	136.5	3.2	135	57.2	TLX
including	133.3	134.5	1.2	308	100
WST-22-1270A	305.8	308.0	2.2	12.3		TLX
WST-22-1273	356.9	358.9	2.0	21.7		TLX
	487.8	490.2	2.4	16.0
	511.0	513.4	2.4	16.5
WST-22-1275	168.6	174.6	6.0	9.38		LXM
WST-22-1276	117.4	119.4	2.0	12.6		LXM
WST-22-1279	80.0	82.0	2.0	57.8	25.3	LXM
including	80.5	81.0	0.5	230	100
	125.9	128.7	2.8	9.82
WST-22-1280	84.2	86.5	2.3	14.5		LXM
WST-22-1285	116.1	120.0	3.9	25.0		TLX
WST-22-1286	101.7	105.5	3.8	101	37.9	TLX
including	102.5	103.0	0.5	577	100
	163.5	166.9	3.4	34.8
including	165.6	166.0	0.4	75.5
WST-22-1287	132.0	134.0	2.0	171	56.2	LXM
including	132.6	133.2	0.6	483	100
WST-22-1288	214.0	216.0	2.0	77.8	41.3	TLX
including	214.9	215.4	0.5	241	100
	215.7	216.0	0.3	108
WST-22-1290	103.0	105.1	2.1	10.7		LXM
WST-22-1292	199.1	201.3	2.2	18.2		TLX
WST-22-1293	100.3	102.3	2.0	127	35.9	TLX
including	101.0	101.6	0.6	405	100	TLX
WST-22-1294	59.0	61.1	2.1	20.5		LXM
WST-22-1296	65.0	71.6	6.6	12.4		LXM
WST-22-1297	84.0	86.4	2.4	112	51.3	LXM
including	84.0	84.4	0.4	462	100
WST-22-1298A	75.0	78.3	3.3	304	41.6	LXM
including	75.6	76.3	0.7	1335	100
WST-23-1304	46.5	49.4	2.9	10.9		LXM
	115.0	117.3	2.3	19.0
WST-22-1305	103.0	105.4	2.4	17.8		TLX
WST-22-1306	114.9	123.0	8.1	24.8		TLX
including	115.3	116.0	0.7	76.1
and	120.9	121.5	0.6	69.4
WST-22-1307	119.0	121.0	2.0	30.7		TLX
	114.0	116.4	2.4	12.2		LXM
WST-22-1308	57.0	59.0	2.0	13.6
WST-23-1309	60.9	63.0	2.1	18.1		LXM
	143.0	145.0	2.0	16.0
WST-23-1310	65.7	69.0	3.3	78.2	60.9	LXM
including	68.0	69.0	1.0	157	100
WST-23-1316	114.7	117.0	2.3	18.6		LXM
WST-23-1317	70.6	72.6	2.0	305	40.7	LXM
including	71.0	71.5	0.5	1135	100
	72.6	74.7	2.1	16.9
WST-23-1319	72.2	74.8	2.6	16.1		LXM
WST-23-1320	75.2	78.5	3.3	11.1		LXM
WST-23-1322	71.4	74.3	2.9	138	43.9	TLX
including	72.0	73.0	1.0	372	100
	127.8	131.0	3.2	49.6	27.4
including	128.9	129.5	0.6	218	100
	126.5	133.0	6.5	25.7	14.8
including	128.9	129.5	0.6	218	100
	156.6	158.9	2.3	13.7
WST-23-1323	113.4	116.0	2.6	56.9	40.8	TLX
including	114.2	114.7	0.5	153	100
and	115.2	115.5	0.3	152	100
WST-23-1326	63.7	66.0	2.3	89.4	31.6	LXM
including	64.7	65.4	0.7	290	100
WST-23-1329	113.0	117.5	4.5	25.6		TLX
including	114.0	114.3	0.3	53.0
and	116.6	117.2	0.6	53.8
	120.9	125.0	4.1	17.8
	145.6	146.0	2.1	10.8
WST-23-1332	99.0	102.6	3.6	39.1	36.8	LXM
including	101.0	101.4	0.4	121	100
WST-23-1343	127.1	129.5	2.4	129	29.6	LXM
including	127.1	127.8	0.7	442	100
	62.0	64.0	2.0	20.0		LXM
WST-23-1345	56.1	59.0	2.9	16.7		LXM
WST-23-1347	119.5	121.8	2.3	25.8		LXM
WST-23-1348	65.0	67.3	2.3	11.4		LXM
	102.3	104.9	2.6	9.66
WST-23-1350	114.0	116.0	2.0	23.0		LXM
WST-23-1353	91.6	93.9	2.3	37.1	32.3	LXM
WST-23-1354	93.3	95.8	2.5	11.1		LXM
WST-23-1357	89.6	91.6	2.0	14.3		TLX
WST-23-1358	92.6	94.8	2.2	12.8		TLX
WST-23-1360	46.1	50.3	4.2	18.0		LXM
WST-23-1364	46.9	49.0	2.1	12.0		LXM
WST-23-1365	56.0	60.6	4.6	4.61		LXM
WST-23-1366	57.6	61.7	4.1	7.90		LXM
WST-23-1371	87.6	89.7	2.1	9.58		TLX
WST-23-1373	184.5	186.6	2.1	69.7	47.2	TLX
including	185.4	186.2	0.8	159	100
	161.5	163.5	2.0	28.0		TLX
WST-23-1374	77.2	80.0	2.8	19.9		LXM
	81.5	83.6	2.1	43.7	14.5	LXM
WST-23-1375	102.0	104.0	2.0	10.4		LXM
WST-23-1381	86.0	88.0	2.0	12.8		LXM
WST-23-1384	54.5	56.7	2.2	228	31.8	LXM
including	56.0	56.7	0.7	717	100
WST-23-1387	59.0	61.0	2.0	34.7		LXM
WST-23-1388	84.5	86.6	2.1	29.4		LXM
WST-23-1389	84.5	87.0	2.5	10.2		TLX
WST-23-1390	84.7	87.0	2.3	13.6		TLX
WST-23-1391A	89.0	91.0	2.0	23.5	22.1	TLX
WST-23-1395	125.2	127.5	2.3	177	71.6	TLX
including	126.2	126.8	0.6	460	100
	134.8	137.0	2.2	54.9	23.5
including	135.3	135.7	0.4	273	100
	146.0	150.9	4.9	4.91
WST-23-1396	182.8	184.9	2.1	20.3		TLX
WST-23-1398	95.3	98.7	3.4	35.1	28.9	LXM
including	95.3	96.2	0.9	124	100
WST-23-1406	73.5	75.6	2.1	27.0		LXM
WST-23-1410	95.0	97.2	2.2	10.9		TLX
WST-23-1414	121.0	123.0	2.0	17.4		LXM
WST-23-1416	83.0	85.2	2.2	9.88		LXM
WST-23-1419	89.9	92.0	2.1	110	39.8	LXM
including	90.3	90.6	0.3	499	100
WST-23-1422	137.3	141.3	4.0	68.0	49.1	TLX
including	138.8	139.6	0.8	195	100
WST-23-1424	135.5	137.7	2.2	29.3		TLX
	130.0	132.7	2.7	14.5
WST-23-1425	132.2	135.2	3.0	283	61.3	TLX
including	134.6	135.2	0.6	1165	100
	107.0	109.8	2.8	10.0
WST-23-1426	121.0	123.6	2.6	24.3		TLX
	175.0	177.0	2.0	12.2
WST-23-1427	61.0	63.0	2.0	25.4		LXM
WST-23-1429	63.3	65.5	2.2	24.2		LXM
	47.0	49.0	2.0	10.7
WST-23-1430	69.0	71.5	2.5	13.6		LXM
WST-23-1432	88.0	90.5	2.5	9.85		TLX
WST-23-1441	203.3	205.8	2.5	22.5		TLX
WST-23-1442	338.5	340.6	2.1	17.4		TLX
WST-23-1443	166.0	168.3	2.3	71.9	25.4	LHW
including	166.0	166.5	0.5	314	100
	60.0	62.0	2.0	25.2		LXM
	68.0	70.0	2.0	13.9
WST-23-1444	61.2	63.3	2.1	57.3	40.7	LXM
including	61.7	62.3	0.6	158	100
WST-23-1445	61.9	64.0	2.1	44.7	28.9	LXM
	64.0	66.4	2.4	26.8
WST-23-1448	100.0	102.2	2.2	18.3		TLX
WST-23-1450	93.0	95.0	2.0	38.4	25.2	TLX
WST-23-1451	92.7	94.7	2.0	46.1	26.5	TLX
WST-23-1453	68.5	73.1	4.6	48.4	28.7	LXM
including	72.4	73.1	0.7	229	100
	75.2	85.0	9.8	18.7	17.8	LXM
including	76.6	77.1	0.5	119	100
and	81.4	82.8	1.4	47.2
WST-23-1455	92.3	94.9	2.6	46.2	40.8	LXM
including	92.3	93.3	1.0	114	100
WST-23-1456	39.5	41.5	2.0	59.5	30.0	LXM
including	40.0	40.6	0.6	198	100
	64.5	68.9	4.4	18.2		LXM
WST-23-1457	39.0	41.2	2.2	27.2		LXM
WST-23-1458	39.6	41.6	2.0	52.6	30.4	LXM
including	39.6	40.2	0.6	174	100
WST-23-1465	121.0	123.0	2.0	10.3		TLX
WST-23-1466	103.8	106.0	2.2	15.4		TLX
	92.5	95.4	2.9	16.7
WST-23-1467	91.7	94.0	2.3	24.3		TLX
WST-23-1468	91.5	93.7	2.2	9.59		TLX
WST-23-1470	85.4	87.5	2.1	17.5		LXM
WST-23-1471	67.0	69.0	2.0	11.9		LXM
WST-23-1472	71.9	74.1	2.2	9.51		LXM
WST-23-1473	72.5	74.6	2.1	26.9		LXM
WST-23-1474	74.4	77.0	2.6	109	37.5	LXM
including	74.4	75.2	0.8	332	100
WST-23-1475	175.4	180.0	4.6	45.6	25.8	LXM
including	176.0	176.7	0.7	230	100
WST-23-1476	177.2	180.0	2.8	18.2		LXM
WST-23-1478	102.0	104.1	2.1	30.7	29.8	TLX
WST-23-1480	100.0	102.0	2.0	20.5		TLX
WST-23-1482	171.0	173.0	2.0	51.4	40.8	LXM
including	172.2	173.0	0.8	127	100
WST-23-1484	89.6	92.0	2.4	15.3		TLX
WST-23-1485	89.9	92.0	2.1	31.0		TLX
	110.0	112.2	2.2	12.8
WST-23-1486	88.8	91.0	2.2	38.1		TLX
	156.0	158.0	2.0	24.5		TLX
WST-23-1487	152.9	155.0	2.1	118	58.2	LXM
including	152.9	153.3	0.4	354	100
WST-23-1490	150.0	152.0	2.0	10.2		LXM
WST-23-1491	59.3	61.5	2.2	80.4	23.2	LXM
including	59.3	59.6	0.3	520	100
WST-23-1492	56.3	59.7	3.4	35.2	32.3	LXM
including	56.3	56.9	0.6	117	100
WST-23-1494	46.0	48.1	2.1	22.8		LXM
WST-23-1495	131.8	134.1	2.3	14.1	13.1	LXM
WST-23-1496	134.2	137.1	2.9	66.1	17.5	LXM
including	134.6	135.1	0.5	382	100
	49.4	51.7	2.3	17.3
WST-23-1497	47.7	50.6	2.9	39.8	39.3	LXM
including	48.1	48.5	0.4	104	100
WST-23-1500	115.2	117.4	2.2	14.1		LXM
WST-23-1501	107.5	109.6	2.1	12.9		LXM
WST-23-1503	140.0	142.0	2.0	14.2		TLX
WST-23-1514	59.9	62.0	2.1	44.4	19.2	LXM
WST-23-1515	64.0	66.1	2.1	17.4		LXM
WST-23-1516	65.5	68.6	3.1	110	56.0	LXM
including	67.9	68.6	0.7	229	100
	133.0	135.0	2.0	14.8
WST-23-1519	135.0	137.0	2.0	24.4		TLX
WST-23-1520	121.0	123.8	2.8	85.2	75.3	TLX
WST-23-1522	122.0	124.0	2.0	10.2		TLX
WST-23-1523	120.5	124.0	3.5	444	59.0	TLX
including	121.4	121.7	0.3	3910	100
WST-23-1524	119.1	121.6	2.5	121	50.4	TLX
including	120.7	121.6	0.9	296	100
WST-23-1525	148.3	150.4	2.1	19.6		TLX
	123.0	125.1	2.1	17.7
	159.0	161.2	2.2	9.22
	127.0	129.0	2.0	16.0
WST-23-1530	89.0	91.1	2.1	15.1		LXM
	75.2	77.4	2.2	11.5
WST-23-1532	77.0	79.5	2.5	22.7		LXM
	85.4	88.5	3.1	67.9	38.5
including	86.5	86.8	0.3	404	100
	91.0	93.1	2.1	66.0	49.3
including	91.3	92.2	0.9	139	100
WST-23-1533	72.0	74.3	2.3	15.7		LXM
WST-23-1534	40.0	42.0	2.0	19.9		LXM
WST-23-1535	64.8	68.0	3.2	23.9		LXM
WST-23-1538	124.6	126.5	1.9	32.2	30.9	LXM
WST-23-1541	104.0	106.0	2.0	23.5	20.3	LXM
WST-23-1542	55.5	57.5	2.0	43.7	30.5	LXM
WST-23-1543	59.5	64.8	5.3	27.8	25.9	LXM
including	59.5	60.4	0.9	89.3	78.4
and	63.4	63.9	0.5	80.3
WST-23-1549	135.0	137.6	2.6	31.8		LXM
WST-23-1550	132.0	134.5	2.5	18.4		LXM
WST-23-1555	111.2	113.3	2.1	35.0	34.9	TLX
WST-23-1557	83.8	86.1	2.3	78.0	24.5	LXM
including	84.1	84.6	0.5	346	100
WST-23-1560	94.0	96.0	2.0	11.5		LXM
WST-23-1575	44.1	46.5	2.4	8.38		LXM
WST-23-1577	63.3	66.3	3.0	64.9	36.9	LXM
including	64.0	64.6	0.6	240	100
WST-23-1578	41.8	44.2	2.4	18.1		LXM
WST-23-1579	47.3	50.8	3.5	26.9	26.2	LXM
WST-23-1580	48.2	52.2	4.0	36.1		LXM
including	51.6	52.2	0.6	97.3
WST-23-1581	50.5	52.7	2.2	224	58.5	LXM
including	51.7	52.1	0.4	501	100
	136.4	139.6	3.2	24.7		LXM
WST-23-1583	41.9	44.0	2.1	16.6		LXM
WST-23-1585	102.9	105.4	2.5	39.4		LXM
WST-23-1591	60.0	62.0	2.0	19.4		LXM
WST-23-1592	59.6	62.0	2.4	31.4	29.4	LXM
WST-23-1593	42.0	44.0	2.0	10.9		LXM
WST-23-1596	58.0	60.0	2.0	117	25.1	LXM
including	58.0	58.5	0.5	466	100
WST-23-1602	129.0	131.1	2.1	71.5	52.0	TLX
including	129.8	130.5	0.7	159	100
WST-23-1603	123.3	126.1	2.8	322	59.1	TLX
including	123.9	124.8	0.9	918	100
WST-23-1604	122.2	125.0	2.8	21.3	15.4	TLX
WST-23-1605	123.0	125.7	2.7	692	57.8	TLX
including	124.2	125.0	0.8	2240	100
WST-23-1606	121.7	124.6	2.9	183	42.6	TLX
including	122.0	122.5	0.5	916	100
WST-23-1607	119.3	122.4	3.1	171	34.1	TLX
including	121.6	122.1	0.5	947	100
	157.0	159.0	2.0	11.9		TLX
WST-23-1608	104.9	107.5	2.6	43.0	12.0	LXM
including	106.2	106.5	0.3	369	100
WST-23-1614	98.0	100.2	2.2	20.0		TLX
WST-23-1615	84.0	87.2	3.2	33.9	32.7	TLX
including	85.2	85.6	0.4	68.0
and	85.9	86.2	0.3	113	100
and	86.6	86.9	0.3	83.0
WST-23-1616	83.0	85.3	2.3	85.3	50.9	TLX
including	84.4	85.0	0.6	232	100
WST-23-1618	72.0	74.0	2.0	16.7		LXM
WST-23-1619	89.4	92.0	2.6	28.4		TLX
WST-23-1620	89.5	91.6	2.1	23.4		TLX
WST-23-1631	86.6	88.6	2.0	21.5		TLX
WST-23-1640	95.0	97.1	2.1	18.0		LXM
	123.0	125.0	2.0	68.5	25.0
including	123.8	124.3	0.5	274	100
WST-23-1642	100.5	102.8	2.3	71.3	45.7	LXM
including	100.9	101.9	1.0	159	100
WST-23-1650	54.8	57.4	2.6	63.3		LXM
WST-23-1652	27.0	29.1	2.1	41.6		LXM
	68.4	75.4	7.0	124	37.1	LXM
including	74.0	75.0	1.0	711	100
WST-23-1661	129.1	132.0	2.9	9.21		LXM
WST-23-1662	115.3	117.6	2.3	18.4		LXM
WST-23-1664	118.8	121.0	2.2	30.6	18.3	LXM
WST-23-1665	124.3	126.3	2.0	16.1		LXM
	143.2	145.2	2.0	12.2
WST-23-1673	56.0	58.8	2.8	77.1	18.0	LXM
including	58.4	58.8	0.4	514	100
WST-23-1674	60.0	62.0	2.0	108	37.4	LXM
including	60.5	61.2	0.7	302	100
WST-23-1675	60.8	63.0	2.2	91.0	39.4	LXM
including	61.3	62.1	0.8	242	100
WST-23-1676	62.6	64.6	2.0	48.5	30.3	LXM
WST-23-1677	45.3	48.0	2.7	62.3	57.4	LXM
including	47.5	48.0	0.5	127	100
	64.0	66.0	2.0	12.8
WST-23-1678	120.6	123.0	2.4	270	79.0	TLX
including	121.0	121.3	0.3	1435	100
WST-23-1679	122.8	124.9	2.1	97.7	53.5	TLX
including	123.2	124.0	0.8	216	100
WST-23-1680	127.6	129.6	2.0	32.5		TLX
WST-23-1681	133.0	135.0	2.0	50.9	16.4	TLX
including	134.2	134.5	0.3	330	100
	258.7	261.1	2.4	13.3		TLX
WST-23-1683	129.2	137.0	7.8	13.0		LXM
including	129.2	129.6	0.4	62.0
and	136.0	137.0	1.0	52.2
WST-23-1687	107.9	110.3	2.4	10.4		TLX
WST-23-1688	113.2	115.3	2.1	20.2		TLX
WST-23-1690	124.0	126.0	2.0	10.4		TLX
WST-23-1692	373.5	375.5	2.0	10.0		LX4
WST-23-1693	374.2	376.5	2.3	23.7		TLX
WST-23-1695	115.0	117.0	2.0	41.7	35.0	LXM
WST-23-1700	109.3	111.4	2.1	31.9		LXM
WST-23-1701	141.7	143.9	2.2	18.4		LHW
WST-23-1704	77.9	79.9	2.0	21.5		LXM
	44.1	46.1	2.0	13.7
WST-23-1705	82.7	91.2	8.5	55.3	13.4	LXM
including	82.7	83.3	0.6	694	100
	96.7	98.7	2.0	33.0	20.1
WST-23-1706	74.6	77.0	2.4	498	84.6	LXM
including	74.6	75.4	0.8	1045	100
WST-23-1707*	83.0	91.0	8.0	413		LXM
including	84.4	85.4	1.0	1580	100
and	87.6	88.0	0.4	962	100
WST-23-1714	105.1	109.6	4.5	65.0	58.7	TLX
including	105.5	106.4	0.9	132	100
WST-23-1715	93.4	95.4	2.0	171	81.9	TLX
including	95.0	95.4	0.4	543	100
WST-23-1719	121.5	123.5	2.0	77.3	42.3	TLX
including	121.8	122.6	0.8	188	100
	97.0	99.0	2.0	11.0		TLX
WST-23-1720	78.6	80.7	2.1	44.9	33.6	TLX
	124.3	126.3	2.0	232	45.3
including	124.6	125.3	0.7	632	100
WST-23-1721	132.1	135.0	2.9	54.0	40.8	TLX
including	133.3	134.2	0.9	143	100
WST-23-1723A	104.0	106.1	2.1	17.3		LXM
	118.0	120.2	2.2	11.6		LXM
WST-23-1736	100.3	103.0	2.7	16.5		TLX
	320.4	322.5	2.1	39.4		LX4
WST-23-1737	143.5	145.7	2.2	13.8		TLX
WST-23-1741	65.0	67.0	2.0	12.7		LXM
WST-23-1742	62.0	64.2	2.2	37.3		LXM
WST-23-1743	59.8	62.0	2.2	160	72.9	LXM
including	59.8	60.4	0.6	420	100
	134.5	139.0	4.5	12.4		LXM
	51.7	54.4	2.7	12.5
	129.0	131.0	2.0	14.7
WST-23-1745	57.0	59.4	2.4	50.7
WST-23-1746	185.9	188.0	2.1	22.0		TLX
	363.8	366.0	2.2	25.8	19.1	TLX
	369.9	372.1	2.2	282	15.1
including	370.3	370.6	0.3	2060	100
WST-23-1748	108.8	111.8	3.0	35.3		LXM
including	110.5	111.0	0.5	72.7
and	111.4	111.8	0.4	92.8
WST-23-1753	127.7	130.1	2.4	12.2		TLX
WST-23-1756	126.0	128.0	2.0	17.5		LXM
	131.4	133.6	2.2	46.5	27.1	LXM
including	133.1	133.6	0.5	186	100
WST-23-1760	56.6	58.6	2.0	120	50.1	LXM
including	56.6	57.6	1.0	240	100
	192.0	194.0	2.0	266	54.8
including	192.6	192.9	0.3	1050	100
WST-23-1768	115.9	120.0	4.1	10.2		TLX
WST-23-1769	101.8	105.3	3.5	36.7		TLX
including	104.5	105.3	0.8	84.9
WST-23-1775	131.0	133.0	2.0	16.9		LXM
	137.1	139.5	2.4	100	38.3
including	139.2	139.5	0.3	593	100
	144.6	147.0	2.4	24.4
WST-23-1781	136.1	138.2	2.1	38.9	24.3	TLX
WST-23-1782	129.0	131.2	2.2	48.4	31.9	TLX
including	130.0	130.6	0.6	161	100
WST-23-1783	124.0	126.3	2.3	50.3	45.1	TLX
including	125.1	125.7	0.6	120	100
WST-23-1786	99.8	103.0	3.2	37.0	33.5	TLX
including	101.8	102.6	0.8	107	92.5
WST-23-1788	95.8	100.6	4.8	39.3	30.4	TLX
including	95.8	96.7	0.9	148	100
	111.4	115.5	4.1	8.68		TLX
WST-23-1789	131.7	134.0	2.3	36.1	16.5	LXM
WST-23-1793	150.0	152.0	2.0	10.3		LXM
WST-23-1794	149.7	151.7	2.0	32.2		LXM
WST-23-1796	117.8	120.0	2.2	12.2		TLX
WST-23-1810	131.5	133.6	2.1	167	43.2	LXM
including	132.3	133.2	0.9	388	100
	148.6	150.6	2.0	11.4
WST-23-1812	124.8	126.8	2.0	15.6		LXM
WST-23-1829	116.0	118.0	2.0	11.7		LXM

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See "Quality Control and Reporting Protocols" below. LXM = Lynx Main, LHW = Lynx Hanging Wall, and TLX = Triple Lynx. *0.5 meters of core not recovered in this interval.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-23-2671	337	-66	126	453338	5435040	398	3525E
WST-22-1082	166	-23	516.6	453444	5435276	-99	3725E
WST-22-1154	163	2	123.6	453342	5435282	-187	3650E
WST-22-1171	139	-13	242.7	453180	5435128	174	3425E
WST-22-1182A	112	-76	761.1	453647	5435347	-189	3950E
WST-22-1182A-W1	112	-76	810.6	453647	5435347	-189	3950E
WST-22-1218	162	-49	279.3	453542	5435311	-173	3825E
WST-22-1219	163	-42	243.5	453542	5435311	-173	3825E
WST-22-1237	143	-9	183.4	453701	5435376	-197	4000E
WST-22-1240	141	9	177.5	453701	5435376	-196	4000E
WST-22-1241	152	12	153.5	453343	5435283	-186	3650E
WST-22-1246	159	7	183.5	453600	5435324	-179	3900E
WST-22-1249A	186	-3	384.6	453442	5435275	-98	3725E
WST-22-1250	182	0	381.7	453442	5435275	-98	3725E
WST-22-1252	169	-41	252.4	453542	5435311	-173	3825E
WST-22-1253	165	-38	252.3	453542	5435311	-172	3825E
WST-22-1254	169	-36	252.5	453541	5435311	-172	3825E
WST-22-1255	162	-32	240.5	453542	5435311	-172	3825E
WST-22-1256	165	-70	585.5	453757	5435406	-208	4075E
WST-22-1261	163	2	204.6	453258	5435210	97	3525E
WST-22-1262	147	9	165.5	453344	5435283	-186	3650E
WST-22-1264	147	1	171.5	453344	5435283	-187	3650E
WST-22-1265	143	4	168.5	453344	5435283	-187	3650E
WST-22-1266	140	1	168.4	453344	5435283	-187	3650E
WST-22-1270A	162	-18	417.5	453278	5435248	-145	3575E
WST-22-1273	138	-68	559.1	453758	5435406	-208	4075E
WST-22-1275	161	-10	192.3	453258	5435210	97	3525E
WST-22-1276	161	-11	192.4	453258	5435210	97	3525E
WST-22-1279	141	-9	198.7	453180	5435128	174	3425E
WST-22-1280	137	-3	99.5	453180	5435128	174	3425E
WST-22-1285	145	-7	195.6	453344	5435283	-187	3650E
WST-22-1286	152	-55	183.6	453646	5435347	-188	3950E
WST-22-1287	134	-52	253.1	453758	5435406	-207	4075E
WST-22-1288	158	-42	255	453543	5435312	-173	3825E
WST-22-1290	148	42	264.1	453646	5435347	-184	3950E
WST-22-1292	170	2	360.5	453279	5435248	-144	3575E
WST-22-1293	172	-47	390.5	453543	5435311	-173	3825E
WST-22-1294	173	-22	159.5	453756	5435405	-207	4075E
WST-22-1296	136	-18	196	453758	5435406	-207	4075E
WST-22-1297	136	-17	150.6	453180	5435128	174	3425E
WST-22-1298A	141	-18	156.5	453179	5435127	174	3425E
WST-22-1305	151	-8	174.6	453344	5435283	-187	3650E
WST-22-1306	149	-4	174.1	453343	5435283	-187	3650E
WST-22-1307	152	-1	177.5	453343	5435282	-187	3650E
WST-22-1308	151	-2	168.3	453601	5435324	-179	3900E
WST-23-1304	149	-19	174.6	453700	5435376	-197	4000E
WST-23-1309	157	5	174.6	453600	5435324	-179	3900E
WST-23-1310	152	10	177.3	453600	5435324	-179	3900E
WST-23-1316	159	-2	204.5	453259	5435210	97	3525E
WST-23-1317	152	-18	93.6	453179	5435127	174	3425E
WST-23-1319	160	-7	126.5	453179	5435127	174	3425E
WST-23-1320	164	0	129.5	453179	5435127	174	3425E
WST-23-1322	217	-43	165.5	453540	5435311	-173	3825E
WST-23-1323	209	-37	177.5	453541	5435311	-173	3825E
WST-23-1326	152	21	219.7	453646	5435347	-186	3950E
WST-23-1329	143	-7	180.3	453344	5435283	-187	3650E
WST-23-1332	119	-10	120.2	453180	5435128	174	3425E
WST-23-1343	156	6	162.5	453646	5435346	-187	3950E
WST-23-1345	148	-21	150.5	453646	5435347	-187	3950E
WST-23-1347	159	8	144.4	453258	5435210	97	3525E
WST-23-1348	156	-30	120.6	453757	5435406	-207	4075E
WST-23-1350	173	-6	135.5	453258	5435210	97	3525E
WST-23-1353	183	13	111.5	453442	5435275	-98	3725E
WST-23-1354	180	19	114.7	453443	5435276	-97	3725E
WST-23-1357	150	-20	102.6	453542	5435311	-172	3825E
WST-23-1358	145	-24	114.7	453542	5435311	-172	3825E
WST-23-1360	154	-17	150.6	453701	5435376	-197	4000E
WST-23-1364	156	-2	156.6	453700	5435375	-197	4000E
WST-23-1365	153	1	159.6	453700	5435375	-197	4000E
WST-23-1366	155	5	165.6	453701	5435376	-196	4000E
WST-23-1371	153	-14	114.6	453279	5435248	-145	3575E
WST-23-1373	138	-59	249.6	453646	5435347	-188	3950E
WST-23-1374	147	-8	141.5	453179	5435127	174	3425E
WST-23-1375	172	-2	126.5	453179	5435127	174	3425E
WST-23-1381	164	21	102.4	453443	5435276	-97	3725E
WST-23-1384	170	-14	84.5	453645	5435346	-187	3950E
WST-23-1387	180	-5	81.5	453645	5435346	-187	3950E
WST-23-1388	136	-7	96.5	453543	5435311	-172	3825E
WST-23-1389	154	-13	201.5	453543	5435311	-172	3825E
WST-23-1390	150	-15	201.5	453543	5435311	-172	3825E
WST-23-1391A	153	-16	204.4	453542	5435311	-172	3825E
WST-23-1395	183	-9	159.5	453442	5435339	-204	3750E
WST-23-1396	149	-53	231.6	453757	5435406	-207	4075E
WST-23-1398	185	20	123.5	453442	5435275	-97	3725E
WST-23-1406	168	-26	102.6	453179	5435127	174	3425E
WST-23-1410	143	-10	111.3	453279	5435248	-145	3575E
WST-23-1414	161	-18	201.6	453259	5435210	97	3525E
WST-23-1416	173	24	117.3	453442	5435276	-97	3725E
WST-23-1419	123	4	108.4	453446	5435277	-98	3725E
WST-23-1422	179	-8	210.4	453443	5435339	-204	3750E
WST-23-1424	176	-7	210.3	453443	5435339	-204	3750E
WST-23-1425	172	-3	210.2	453443	5435339	-204	3750E
WST-23-1426	168	-12	201.4	453443	5435339	-205	3750E
WST-23-1427	164	6	84.6	453645	5435346	-187	3950E
WST-23-1429	153	15	126.4	453646	5435346	-186	3950E
WST-23-1430	152	29	129.4	453646	5435347	-186	3950E
WST-23-1432	165	1	102.5	453278	5435248	-144	3575E
WST-23-1441	112	-50	219.9	453759	5435409	-207	4075E
WST-23-1442	103	-53	480.3	453759	5435409	-207	4075E
WST-23-1443	162	3	186.6	453600	5435324	-179	3900E
WST-23-1444	145	5	168.5	453601	5435324	-179	3900E
WST-23-1445	129	-3	87.4	453602	5435325	-180	3900E
WST-23-1448	175	-17	114.5	453541	5435311	-172	3825E
WST-23-1450	181	-20	114.6	453541	5435311	-172	3825E
WST-23-1451	183	-29	111.7	453540	5435311	-172	3825E
WST-23-1453	140	29	120.4	453646	5435347	-185	3950E
WST-23-1455	140	14	105.6	453646	5435347	-186	3950E
WST-23-1456	129	12	111.6	453646	5435347	-186	3950E
WST-23-1457	129	24	117.6	453646	5435347	-186	3950E
WST-23-1458	130	29	123.2	453646	5435347	-185	3950E
WST-23-1465	180	26	150.4	453278	5435248	-143	3575E
WST-23-1466	183	22	141.4	453278	5435248	-143	3575E
WST-23-1467	182	17	144.6	453278	5435248	-144	3575E
WST-23-1468	180	12	114.2	453278	5435248	-144	3575E
WST-23-1470	172	19	114.5	453443	5435276	-97	3725E
WST-23-1471	126	3	174.4	453602	5435325	-179	3900E
WST-23-1472	129	11	90.4	453602	5435325	-179	3900E
WST-23-1473	130	18	93.4	453601	5435325	-179	3900E
WST-23-1474	135	24	90.4	453601	5435324	-178	3900E
WST-23-1475	107	-22	232.2	453760	5435409	-207	4075E
WST-23-1476	105	-27	232.1	453760	5435409	-207	4075E
WST-23-1478	180	-14	117.6	453541	5435311	-172	3825E
WST-23-1480	195	-9	120.6	453540	5435311	-172	3825E
WST-23-1482	193	-19	204.6	453541	5435311	-172	3825E
WST-23-1484	176	-7	138.2	453278	5435248	-145	3575E
WST-23-1485	173	-20	171.1	453278	5435248	-145	3575E
WST-23-1486	176	-14	177.2	453278	5435248	-145	3575E
WST-23-1487	115	-9	222.3	453506	5435326	-89	3800E
WST-23-1490	123	-3	162.4	453506	5435326	-88	3800E
WST-23-1491	160	8	165.6	453701	5435376	-196	4000E
WST-23-1492	160	4	159.5	453701	5435376	-196	4000E
WST-23-1494	160	-10	159.5	453700	5435375	-197	4000E
WST-23-1495	158	-14	160	453700	5435376	-197	4000E
WST-23-1496	159	-18	171.5	453700	5435376	-197	4000E
WST-23-1497	154	-21	189.6	453700	5435376	-197	4000E
WST-23-1500	168	-32	126.5	453259	5435210	96	3525E
WST-23-1501	167	-28	123.5	453259	5435210	96	3525E
WST-23-1503	183	-14	153.1	453278	5435248	-145	3575E
WST-23-1514	135	3	93	453601	5435325	-179	3900E
WST-23-1515	137	10	83	453601	5435324	-179	3900E
WST-23-1516	146	12	168.3	453601	5435324	-179	3900E
WST-23-1519	174	-11	201.2	453443	5435339	-205	3750E
WST-23-1520	170	-7	330.4	453443	5435339	-204	3750E
WST-23-1522	163	-1	150.4	453443	5435339	-204	3750E
WST-23-1523	164	-6	147.4	453443	5435339	-204	3750E
WST-23-1524	166	-10	195.4	453443	5435339	-205	3750E
WST-23-1525	162	-20	189.4	453443	5435339	-205	3750E
WST-23-1530	134	34	117.1	453646	5435346	-185	3950E
WST-23-1532	122	25	126.4	453647	5435347	-185	3950E
WST-23-1533	121	18	117.4	453647	5435347	-186	3950E
WST-23-1534	122	10	117.5	453647	5435347	-186	3950E
WST-23-1535	118	-2	83.9	453647	5435347	-187	3950E
WST-23-1538	171	-36	141.5	453259	5435210	96	3525E
WST-23-1541	177	-20	126.6	453258	5435210	97	3525E
WST-23-1542	140	-4	81.3	453601	5435324	-180	3900E
WST-23-1543	129	-12	75.4	453602	5435325	-180	3900E
WST-23-1549	126	-15	159.5	453506	5435326	-89	3800E
WST-23-1550	129	-15	156.5	453505	5435326	-89	3800E
WST-23-1555	189	21	144.2	453277	5435248	-143	3575E
WST-23-1557	182	12	99.4	453179	5435127	175	3425E
WST-23-1560	182	24	114.2	453179	5435127	176	3425E
WST-23-1575	132	-3	184.5	453646	5435347	-187	3950E
WST-23-1577	129	4	156.3	453647	5435347	-187	3950E
WST-23-1578	142	6	153.1	453646	5435347	-187	3950E
WST-23-1579	161	0	162	453700	5435375	-197	4000E
WST-23-1580	165	-2	177.6	453700	5435375	-197	4000E
WST-23-1581	169	-5	177.6	453700	5435375	-197	4000E
WST-23-1583	164	-13	150.5	453700	5435375	-197	4000E
WST-23-1585	156	-42	120.7	453179	5435127	173	3425E
WST-23-1591	143	1	180.5	453646	5435346	-187	3950E
WST-23-1592	143	-4	180.5	453646	5435347	-187	3950E
WST-23-1593	147	-7	168.5	453646	5435346	-187	3950E
WST-23-1596	141	-20	153.5	453646	5435347	-187	3950E
WST-23-1602	155	2	147.5	453444	5435339	-204	3750E
WST-23-1603	159	-1	147.6	453444	5435339	-204	3750E
WST-23-1604	162	-4	312.5	453444	5435339	-204	3750E
WST-23-1605	157	-5	144.6	453444	5435339	-204	3750E
WST-23-1606	159	-10	231.4	453444	5435339	-205	3750E
WST-23-1607	161	-10	288.5	453442	5435339	-205	3750E
WST-23-1608	142	-6	168.6	453321	5435227	104	3600E
WST-23-1614	170	-35	111.6	453600	5435324	-180	3900E
WST-23-1615	158	-39	108.6	453600	5435324	-181	3900E
WST-23-1616	148	-40	105.3	453601	5435324	-181	3900E
WST-23-1618	133	-32	105.5	453601	5435325	-180	3900E
WST-23-1619	133	-39	105.5	453601	5435325	-181	3900E
WST-23-1620	134	-44	117.2	453601	5435325	-181	3900E
WST-23-1631	165	-11	114.4	453542	5435311	-172	3825E
WST-23-1640	160	-23	156.6	453321	5435227	104	3600E
WST-23-1642	166	-19	132.6	453320	5435227	104	3600E
WST-23-1650	176	-15	75.3	453699	5435375	-197	4000E
WST-23-1652	170	-35	78.4	453700	5435375	-198	4000E
WST-23-1661	133	0	144.5	453322	5435228	105	3600E
WST-23-1662	137	4	165.6	453322	5435228	105	3600E
WST-23-1664	138	-4	165.4	453322	5435227	104	3600E
WST-23-1665	146	1	171.6	453321	5435227	105	3600E
WST-23-1673	151	-7	162.6	453646	5435346	-187	3950E
WST-23-1674	148	-2	156.5	453646	5435347	-187	3950E
WST-23-1675	149	3	177.4	453646	5435346	-187	3950E
WST-23-1676	150	7	159.5	453646	5435346	-186	3950E
WST-23-1677	148	11	159.5	453646	5435346	-186	3950E
WST-23-1678	155	-13	192.5	453443	5435339	-205	3750E
WST-23-1679	150	-13	177.2	453443	5435339	-205	3750E
WST-23-1680	150	-2	147.3	453444	5435339	-204	3750E
WST-23-1681	149	2	282.3	453444	5435339	-204	3750E
WST-23-1683	128	-2	174.5	453322	5435228	105	3600E
WST-23-1687	194	11	123.3	453277	5435248	-144	3575E
WST-23-1688	199	13	375.3	453277	5435248	-144	3575E
WST-23-1690	199	22	141.4	453277	5435248	-143	3575E
WST-23-1692	153	-35	422.8	453700	5435375	-198	4000E
WST-23-1693	159	-34	393.5	453257	5435209	96	3525E
WST-23-1695	144	-17	144.6	453504	5435325	-89	3800E
WST-23-1700	148	5	144.6	453504	5435325	-88	3800E
WST-23-1701	151	11	153.5	453504	5435325	-88	3800E
WST-23-1704	151	35	102.2	453646	5435347	-185	3950E
WST-23-1705	159	39	105.1	453645	5435346	-185	3950E
WST-23-1706	163	33	96.4	453645	5435346	-185	3950E
WST-23-1707	169	38	108.1	453645	5435346	-185	3950E
WST-23-1714	130	-53	198.1	453600	5435326	-181	3900E
WST-23-1715	132	-49	126.4	453601	5435326	-181	3900E
WST-23-1719	156	-18	291.3	453443	5435339	-205	3750E
WST-23-1720	153	-8	138.4	453443	5435339	-204	3750E
WST-23-1721	156	5	171.3	453443	5435339	-204	3750E
WST-23-1723A	139	-3	170.8	453322	5435228	104	3600E
WST-23-1736	154	-46	342.3	453543	5435312	-173	3825E
WST-23-1737	184	-3	210.5	453442	5435339	-204	3750E
WST-23-1741	157	13	165.6	453646	5435346	-186	3950E
WST-23-1742	160	9	171.4	453646	5435346	-186	3950E
WST-23-1743	159	4	165.4	453645	5435346	-187	3950E
WST-23-1745	153	-4	162.6	453646	5435346	-187	3950E
WST-23-1746	204	15	387.3	453277	5435248	-143	3575E
WST-23-1748	164	7	195.6	453503	5435325	-88	3800E
WST-23-1753	201	26	141.4	453277	5435248	-143	3575E
WST-23-1756	146	-2	171.5	453322	5435227	104	3600E
WST-23-1760	148	-15	348.6	453646	5435346	-187	3950E
WST-23-1768	152	-40	198.4	453279	5435248	-145	3575E
WST-23-1769	149	-45	351.3	453543	5435312	-173	3825E
WST-23-1775	152	1	174.5	453321	5435227	105	3600E
WST-23-1781	140	-7	153.3	453444	5435339	-205	3750E
WST-23-1782	145	-9	144.5	453444	5435339	-204	3750E
WST-23-1783	150	-11	141.2	453444	5435339	-205	3750E
WST-23-1786	161	-40	189.4	453279	5435248	-145	3575E
WST-23-1788	165	-32	153.7	453278	5435248	-145	3575E
WST-23-1789	126	-3	177.1	453323	5435236	55	3600E
WST-23-1793	131	-10	165.5	453323	5435236	55	3600E
WST-23-1794	127	-13	168.5	453323	5435236	55	3600E
WST-23-1796	171	-32	156.6	453278	5435248	-145	3575E
WST-23-1810	134	-19	168.5	453323	5435236	55	3600E
WST-23-1812	135	-8	165.6	453323	5435236	55	3600E
WST-23-1829	140	-23	165.5	453323	5435236	54	3600E

Lynx ZoneMineralization 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 PersonThe scientific and technical content of this news release has been reviewed, prepared, and approved by Ms. Isabelle Roy, P.Geo. (OGQ 535), Director of Technical Services 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 ProtocolsTrue 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 DepositThe Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource estimate on Windfall (with an effective date of June 7, 2022 ) (the “Windfall Resource Estimate”) and the mineral reserve estimate on Windfall (with an effective date of November 25, 2022) (the “Windfall Reserve Estimate”) are described in the technical report entitled “Feasibility Study for the Windfall Project, Eeyou Istchee James Bay, Québec, Canada” (the “FS Technical Report”) and dated January 10, 2023 (with an effective date of November 25, 2022). The Windfall Resource Estimate, assuming 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 Mineral Reserve, assuming 3.5 g/t operating, 2.5 g/t incremental, and 1.7 g/t development cut-off grade, comprises 12,183,000 tonnes at 8.06 g/t Au (3,159,000 ounces) in the probable mineral reserves category. The key assumptions, parameters, limitations and methods used in the feasibility study for Windfall, including the related Windfall Resource Estimate and Windfall Reserve Estimate, are described in the FS Technical Report, which was prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). The FS Technical Report is available on SEDAR+ (www.sedarplus.com) under Osisko’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 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 reserves are defined from surface to a depth of 1,100 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 50% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 50% interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,300 square kilometers).

Cautionary Note Regarding Forward-Looking InformationThis 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 expected timing (if at all) to hook-up the power line; the expected allocation of power under the power allocation agreement being realized (if any); the expected power demand for Windfall; the assumptions limitations and qualifications in the FS Technical Report, including relating to the Windfall Resource Estimate and Windfall Reserve Estimate; reliance on third-parties for infrastructure, including power lines, with reference to the agreement with Miyuukaa for the transmission of hydroelectric power to the Windfall site; the results of the FS Technical Report, including NPV, IRR, production, tax-free cash flows, capex, AISC, milling operations, average recovery, job creation; the Lynx zone remaining open to expansion down plunge. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; reliance on third-parties, including governmental entities, for mining activities, including for infrastructure; the timing and ability, if at all, to obtain permits; the reliance on third-parties for infrastructure critical to build and operate the Windfall project, including power lines; our ability to obtain power for the Windfall project, if at all or on terms economic to the Corporation; the status of third-party approvals or consents; 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 Canadian/United States dollar exchange rate; the global economic climate; metal (including gold) prices; dilution; environmental risks; and community and non-governmental actions. For additional information with respect to these and other factors and assumptions underlying the forward-looking information in this news release, please see the section entitled “Risk Factors” in the most recent annual information form of Osisko for the year ended December 31, 2022, a copy of which is available on SEDAR+ (www.sedarplus.com) under Osisko’s issuer profile. 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 BurzynskiChief Executive OfficerTelephone (416) 363-8653