Osisko Mining Inc.

New Results Include 413 g/t Au Over 8.0 Metres and 623 g/t Au Over 3.0 Metres

TORONTO, Oct. 26, 2023 (GLOBE NEWSWIRE) -- 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 182 381.7 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 164 129.5 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 161 162 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 133 144.5 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 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 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 Protocols
Truewidthdeterminationisestimatedat55-80%ofthereportedcorelengthintervalforthezone.Assaysareuncutexceptwhere 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 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 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 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 Burzynski
Chief Executive Officer
Telephone (416) 363-8653