{"success":true,"data":{"pressRelease":{"id":"140002","rtpr_id":"nGNX6YLLZZ-20260910","ticker":"OM","exchange":"TSX","all_tickers":["OM"],"title":"Osisko Intersects 256 Metres Averaging 0.85% Cu at Gaspé","author":"Globe Newswire","published_at":"2026-09-10T10:00:00.458Z","article_body":"MONTREAL, Sept. 10, 2026 (GLOBE NEWSWIRE) -- Osisko Metals Incorporated (the\n“Company” or “Osisko Metals”) (TSX: OM\n(https://www.globenewswire.com/Tracker?data=4K3X4CEOXdVn-qiv0YWYWCj6y9WjXYhyG_Ljzeymoughi4Xw-yrWmKes53EZjYA8e8BnEKsmGyXdwLUexkAcLcXrnMcWK0EA0xwSrbtiNF6PvO4hTK4HOEysJoAt1upr);\nOTCQX: OMZNF\n(https://www.globenewswire.com/Tracker?data=0LrlqyRCUrgZYULE3VJ3ylubukT2pJFBpuReuCdCl_ZMVkN7BbaD61Q0oJtq39Gvcm49ur2h6hexpb00WFihpU3zCzFNcBODFo6NhAhvYTtkOUjPdwW61m_4oz7rqoGD);\nFRANKFURT: 0B51\n(https://www.globenewswire.com/Tracker?data=DnMYgufmNwocNUEseE3xMq-xmHFVbPRFfNfHEr02fE9RRvrc7JTeHux7Yq0WkSi8JFY4lOvFlWY9rWEuNehzjY2Z7ZbZSrYuDiTuvWN3p1eMVbUlxOE1ywDsb5sSVzEJ))\nis pleased to announce additional new analytical results from the 2026 drill\nprogram at the Gaspé Copper Project, located in the Gaspé Peninsula of\nEastern Québec.\n\nNew results are presented below (see Table 1), including 28 mineralized\nintercepts from 12 drill holes. Reported “infill” intercepts are located\nwithin the 2026 MRE model (see April 14, 2026 news release\n(https://www.globenewswire.com/Tracker?data=Nw8Rpj89dE2wUyjmogJOq9QqgA6j7faZlI7q4j8p3X7e4z8QZk2mK5WRRc1osKb158qsUD0CCG89BcyB924dxc_LwDqdTQNr19Qs6varnJ81NpCRSaeLh8dUKaVKKboPrCQCx6cqv589P-zYq8ZWI0juZWcCtHzVXWYC0Sa0ykmBqcDAKYTvEI22Ww-8B22xXy2r3W_EUgaY3cu1H4NqdeTMnAHyz7OotHGPaM0hiH8=)),\nfocused on upgrading Inferred Mineral Resources to Measured or Indicated\ncategories, as applicable. “Expansion” intercepts are located outside the\n2026 MRE model and comprise either i) in-pit expansion, which offers potential\nto convert in-pit waste into additional resources within the 2026 MRE Whittle\npit; or ii) out-of-pit expansion, consisting of mineralization located outside\nthe 2026 MRE Whittle pit, which may potentially lead to the definition of new\nresources. Some of the reported intercepts may have contiguous shallower\ninfill as well as deeper expansion (noted as “Both”). Maps showing hole\nlocations are available at www.osiskometals.com.\n\nOsisko Metals Chief Executive Officer Robert Wares commented: “We are very\npleased with these excellent new results from the current drilling,\nparticularly the high-grade intercept in hole 30-1228 located 800 metres west\nof the 2026 MRE model. The mineralized system continues to expand beyond the\ncurrent pit limits with noticeable grade improvement in the area around Needle\nMountain. Additionally, infill holes 30-1233 and 30-1235 produced\nbetter-than-average grades at the south end of the 2026 MRE model. New assay\nresults are now being received at a faster pace, and we expect to provide\ncontinuous updates throughout the fall.”\n\n\n\n\nHighlights\n* 256.5 metres averaging 0.85% Cu (Out-of-pit expansion) in DDH 30-1228,\nincluding 28.5 metres averaging 4.74% Cu and 27.4 g/t Ag\n* 257.5 metres averaging 0.39% Cu (Infill) in DDH 30-1235\n* 177.5 metres averaging 0.40% Cu (Infill) in DDH 30-1233\n* 101.0 metres averaging 0.44% Cu (In-pit expansion) in DDH 30-1226\n* 67.7 metres averaging 0.63% Cu (Out-of-pit expansion) in DDH 30-1234\n* 49.7 metres averaging 0.74% Cu (Out-of-pit expansion) in DDH 30-1225\nTable 1: Infill and Expansion Drilling Results\n\n DDH No.      From (m)  To (m)  Length (m)  Cu %  Ag g/t  Mo %    CuEq* %  Type**       \n 30-1224      123.0     151.0   28.0        0.24  2.35    <0.005  0.24     Expansion 1  \n and          318.0     366.0   48.0        0.16  1.28    0.041   0.30     Expansion 1  \n and          390.0     428.0   38.0        0.15  1.44    0.039   0.29     Expansion 1  \n and          546.8     700.0   153.2       0.20  1.58    0.023   0.28     Expansion 2  \n 30-1225      57.0      75.0    18.0        0.14  1.07    <0.005  0.14     Expansion 2  \n and          88.3      141.0   52.7        0.36  2.11    <0.005  0.37     Expansion 2  \n and          178.3     228.0   49.7        0.74  3.86    <0.005  0.75     Expansion 2  \n and          259.5     265.5   6.0         1.19  6.10    <0.005  1.20     Expansion 2  \n 30-1226      43.0      144.0   101.0       0.44  2.35    <0.005  0.45     Expansion 1  \n and          196.5     214.5   18.0        0.31  2.07    <0.005  0.32     Expansion 2  \n and          295.5     324.0   28.5        0.24  2.73    <0.005  0.24     Expansion 2  \n 30-1227      73.0      104.0   31.0        0.20  1.54    <0.005  0.20     Infill       \n and          144.0     172.5   28.5        0.25  2.24    0.005   0.27     Expansion 1  \n and          204.0     226.0   22.0        0.18  1.57    0.014   0.23     Expansion 1  \n and          254.0     277.5   23.5        0.16  1.67    0.008   0.18     Expansion 1  \n 30-1228      33.0      289.5   256.5       0.85  5.13    <0.005  0.86     Expansion 2  \n (including)  199.5     228.0   28.5        4.74  27.4    0.005   4.78     Expansion 2  \n 30-1229      19.5      157.0   137.5       0.34  1.33    <0.005  0.34     Infill       \n 30-1230      195.6     258.0   62.4        0.17  1.12    <0.005  0.17     Expansion 2  \n and          292.2     316.5   24.3        0.22  1.24    <0.005  0.22     Expansion 2  \n 30-1231      184.5     240.0   55.5        0.19  1.98    <0.005  0.19     Expansion 2  \n And          270.6     346.5   75.9        0.28  2.10    <0.005  0.28     Expansion 2  \n 30-1232      30.0      55.0    25.0        0.20  2.42    <0.005  0.20     Expansion 2  \n 30-1233      16.0      193.5   177.5       0.40  2.88    <0.005  0.41     Infill       \n and          222.0     298.5   76.5        0.42  3.91    <0.005  0.43     Infill       \n and          327.0     379.5   52.5        0.35  2.93    <0.005  0.35     Infill       \n 30-1234      135.3     203.0   67.7        0.63  3.22    <0.005  0.64     Expansion 2  \n and          234.0     280.5   46.5        0.29  1.55    <0.005  0.29     Expansion 2  \n 30-1235      47.0      304.5   257.5       0.39  3.60    <0.005  0.40     Infill       \n\n*  See explanatory notes below on copper equivalent values and Quality\nAssurance/Quality Controls.\n**  Infill refers to intercepts within the current MRE model; Expansion 1\nrefers to in-pit intercepts outside of the current MRE model; Expansion 2\nrefers to out-of-pit intercepts outside of the current MRE model. “Both”\nindicates drill holes that have contiguous shallower infill as well as deeper\nexpansion intercepts.\n\nDiscussion\n\nDrill hole 30-1224, located near the core processing facility, approximately\n200 metres west of western limit of the 2026 MRE model, is a northeasterly\ndipping hole that cut four mineralized intervals, the first three being in-pit\nexpansions and the fourth (deepest) interval being the longest and an\nout-of-pit expansion, consisting of 153.2 metres averaging 0.20% Cu, 0.023% Mo\nand 1.58 g/t Ag, extending mineralization in this area to a vertical depth of\n660 metres.\n\nDrill hole 30-1225, located on the western margin of the Needle Mountain pit,\nis an easterly dipping hole that was drilled under the pit wall, threading\nthrough a pillar of the B Zone underground workings and stopping in a stope of\nthe C Zone underground workings. It cut three mineralized intervals (all\nout-of-pit expansions), including 52.7 metres averaging 0.36% Cu and 2.11 g/t\nAg, followed by a deeper interval of 49.7 metres averaging 0.74% Cu and 3.86\ng/t Ag (B Zone level). This hole also intersected a short interval of 6.0\nmetres averaging 1.19% Cu before intersecting the C Zone stopes.\n\nDrill hole 30-1226 is located near the eastern margin of the Needle Mountain\npit, approximately 260 metres southwest of the limit of the 2026 MRE model,\nand tested an area where little mineralization was expected from historical\ndrilling. It is a northeasterly dipping hole that cut three mineralized\nintervals. The first, an in-pit expansion, averaged 0.44% Cu and 2.35 g/t Ag\nover 101.0 metres (mostly oxidized mineralization). The next two intervals\n(out-of-pit expansions below the pit floor) averaged 0.31% Cu and 2.07 g/t Ag\nover 18.0 metres and 0.24% Cu and 2.73 g/t Ag over 28.5 metres, extending\nmineralization in this area to a vertical depth of 305 metres.\n\nDrill hole 30-1227, located near the western margin of the 2026 MRE model, is\na westerly dipping hole designed to better define the boundary of the 2026 MRE\nmodel. It cut four narrow mineralized intervals, the first being an infill\ninterval and the other three being in-pit expansions. The intervals vary from\n22.0 to 31.0 metres wide with grades averaging 0.16% to 0.25% Cu.\nMineralization along this boundary was extended to a vertical depth of 260\nmetres.\n\nDrill hole 30-1228, located on the western margin of the Needle Mountain pit,\nis a southeasterly dipping hole that was drilled under the pit wall, threading\nthrough pillars of both the B Zone and C Zone underground workings. It cut one\nlong mineralized interval (out-of-pit expansion) comprising 256.5 metres\naveraging 0.85% Cu and 5.13 g/t Ag, including a high grade sub-interval of\n28.5 metres averaging 4.74% Cu and 27.4 g/t Ag (C Zone level). Mineralization\nin this drill hole extended 50 metres below the C Zone to a vertical depth of\n275 metres. This drill hole demonstrates the potential for higher grade\nmineralization surrounding old underground workings, within residual pillars,\nbetween the B and C Zones and deeper below the C Zone.\n\nDrill hole 30-1229, located at the southern end of the 2026 MRE model on the\nnorthern flank of Needle East Mountain, is an infill vertical hole that was\ndrilled to test around and under historical underground workings to a level\nbelow the C Zone. This hole intersected 137.5 metres averaging 0.34% Cu and\n1.33 g/t Ag, but failed to drill through the B Zone pillar and consequently\ndid not penetrate either the B nor C Zones.\n\nDrill hole 30-1230, located on the north flank of Needle Mountain on the\nwestern margin of the modelled mineralized system, is a northeasterly dipping\nhole that cut two mineralized intervals (both out-of-pit expansions),\nincluding 62.4 metres averaging 0.17% Cu and 1.12 g/t Ag (above C Zone\nhorizon), followed by a deeper interval of 24.3 metres averaging 0.22% Cu and\n1.24 g/t Ag (below C Zone horizon), extending mineralization in this area to a\nvertical depth of 305 metres. The C Zone horizon in this hole consisted of\nunmineralized marble.\n\nDrill hole 30-1231, located near the southeastern margin of the Needle\nMountain pit, approximately 820 metres southwest of the limit of the 2026 MRE\nmodel, is an easterly dipping hole that cut two mineralized intervals\n(out-of-pit expansions), the first averaging 0.19% Cu and 1.98 g/t Ag over\n55.5 metres (above C Zone horizon), and the second averaging 0.28% Cu and 2.10\ng/t Ag over 75.9 metres (below C Zone horizon), extending mineralization in\nthis area to a vertical depth of 340 metres. The C Zone horizon in this hole\nconsisted of unmineralized marble.\n\nDrill hole 30-1232, located between Needle East and the Needle Mountain pit,\nis a westerly dipping hole that was drilled to test an area where no\nmineralization was expected from historical drilling. This hole intersected\none zone of mineralization consisting of 25.0 metres averaging 0.20% Cu and\n2.42 g/t Ag (out-of-pit expansion), within the Indian Cove Formation, as well\nas several scattered, thin intersections (5 to 10 metres thick) to a vertical\ndepth of 280 metres.\n\nDrill hole 30-1233 is a vertical infill hole located near the southern margin\nof the 2026 MRE model. It was drilled through a pillar of the B Zone\nunderground workings and cut three mineralized intervals from surface that\nreturned 177.5 metres averaging 0.40% Cu and 2.88 g/t Ag (B Zone level and\nabove), followed by 76.5 metres averaging 0.42% Cu and 3.91 g/t Ag (C Zone\nlevel extending to 45 metres below this level), and then a third interval of\n52.5 metres averaging 0.35% Cu and 2.93 g/t Ag (below C Zone level). This hole\nextends mineralization in this area to a vertical depth of 380 metres.\n\nDrill hole 30-1234, located on the northwestern margin of the Needle Mountain\npit, on the western margin of the modelled mineralized system, is a vertical\nhole that extended a 2024 Osisko hole (30-1038) to deeper levels. This hole\ncut two mineralized intervals (both out-of-pit expansions), including 67.7\nmetres averaging 0.63% Cu and 3.22 g/t Ag (B Zone horizon and below), followed\nby a deeper interval of 46.5 metres averaging 0.29% Cu and 1.55 g/t Ag (below\nC Zone horizon), extending mineralization in this area to a vertical depth of\n280 metres. The second interval reports the merged meterage of both holes. The\nC Zone horizon in this hole consisted of unmineralized marble.\n\nDrill hole 30-1235 is a vertical infill hole located near the southern margin\nof the 2026 MRE model, approximately 170 metres southwest of 30-1233. It was\ndrilled through a pillar of the B Zone underground workings and cut one\ncontinuous mineralized interval, from near surface, that returned 257.5 metres\naveraging 0.39% Cu and 3.60 g/t Ag (from B Zone level to below C Zone level).\nThis hole extends mineralization in this area to a vertical depth of 305\nmetres.\n\nMineralization at Gaspé Copper is of porphyry copper/skarn type and occurs as\ndisseminations and stockworks of chalcopyrite with pyrite or pyrrhotite and\nminor bornite and molybdenite. One prograde and at least five retrograde\nvein/stockwork mineralizing events have been recognized at Copper Mountain,\nwhich overprint earlier, stratiform, carbonate replacement skarn and\nporcellanite-hosted mineralization throughout the Gaspé Copper system.\nPorcellanite is a historical mining term used to describe bleached, pale green\nto white potassic-altered hornfels. Subvertical stockwork mineralization\ndominates at Copper Mountain whereas prograde bedding-parallel mineralization,\nwhich is mostly stratigraphically controlled, dominates in the area of lower\nCopper Mountain, Needle Mountain, Needle East, and Copper Brook. High\nmolybdenum grades (up to 0.5% Mo) were locally obtained in both the C Zone and\nE Zone skarns away from Copper Mountain.\n\nThe 2022 to 2024 Osisko Metals drill programs were focused on defining\nopen-pit resources within the Copper Mountain stockwork mineralization (see\nMay 6, 2024 MRE press release\n(https://www.globenewswire.com/Tracker?data=lHoGDhty-iOFqCnZNqWDTV9-hms9NyUX9PmlLagk6yw5UWXzWA274ip86XmFNeEV5BUjdgeUNtayvsDF0MEk94JqT6RLn7R5atUxPPbcNoqsFQ6OJwx0O-sg0TUHzXo0ydbyIZV_kqu8ay42jAQDOAkV3JE2lfYJ_uFTbhPDMERJErjbqifpqnX1Wn7KrbbqtryhIvTjlzRGXaiMGVjCPKTkJ7NN4GYmaPJCDFt7YQjW_jFLiYP5fa82HUmoLvQ-6A23JKoQZpiQeUSMPptIpuYlSLD2wz2sDCdOWyxAn9s=)).\nExtending the resource model south of Copper Mountain into the poorly-drilled\nprograde skarn/porcellanite portion of the system subsequently led to a\nsignificantly increased resource, mostly in the Inferred category (see\nNovember 14, 2024 MRE press release\n(https://www.globenewswire.com/Tracker?data=Dqj0UUTLXGzBC2xBMGTCgEEEoOdjwOx8vanYQ2gi5n_QAXe0NQjoRlfsCjYmhY6t1s-VwJoFxBchcBO-TLwZlolnYU783aW-LuRTUHLYKa59wljqGwz_yQXlEtEkZtMrk7JqEUcZOzMMyKYhQf6c2YfARdgRqGXjGhNuC4G4kgH2lj33PdO6KtvyWcb1af4U58aF3P7IBqY0Ta456USKRXcrvIp1Fh-HNALjdMQgS__nCUDfZD9wvXG1QHJzR00a)),\nand additional drilling in 2025 led to an additional significant increase in\nresources, mostly in the Measured and Indicated categories (see April 14, 2026\nMRE press release\n(https://www.globenewswire.com/Tracker?data=Nw8Rpj89dE2wUyjmogJOq9EJ4UiPgUWcyJqfPLoRpC5TYLlAsnxcXt0poMqr2BwxzTH1ebm9vzgY_1oUYezHvglSbFvwZ4fkPiyicB2-xAnrd8Zy9JHwajsI2_PLowHmPlAGIanu9ufw5dRZhUR5iC32KnI5hCQWtFzNlyEr5eLVU0aNQJfVEN11qhfMuiFkLBJr-xRipe-4xYEBN06W1uUoIwy17FxeFmpMrHECIEI4CtmxMERxYcQ0qSOegrtA)).\n\nThe current drill program is designed to convert the bulk of the remaining\n2026 MRE Inferred resources to Measured and Indicated categories, as well as\ntest the expansion of the overall resource laterally to the west, and to the\nsouth/southwest towards Needle East and Needle Mountain respectively.\n\nTable 2: Drill hole locations\n\n DDH No.  Azimuth (°)   Dip (°)   Length (m)  UTM E   UTM N    Elevation  \n 30-1224  70            -70       741         315787  5425813  569        \n 30-1225  98            -47       266         315352  5425252  734        \n 30-1226  70            -70       435         315961  5425168  701        \n 30-1227  248           -70       339         316101  5425612  571        \n 30-1228  130           -74       345         315357  5425341  725        \n 30-1229  0             -90       162         316420  5425456  612        \n 30-1230  75            -80       354         315463  5425655  634        \n 30-1231  85            -78       384         315408  5425045  772        \n 30-1232  250           -70       354         315978  5425040  727        \n 30-1233  0             -90       489         316360  5425511  585        \n 30-1234  0             -90       321         315394  5425418  722        \n 30-1235  0             -90       447         316282  5425365  629        \n\n\n\nExplanatory note regarding copper-equivalent grades\n\nCopper Equivalent (CuEq) grades are presented for illustrative purposes only\nto express the combined value of copper, molybdenum, and silver as a single\ncopper grade. CuEq grades are calculated using long-term metal prices of\nUS$4.50/lb copper, US$20.00/lb molybdenum, and US$45.00/oz silver, and\nincorporate assumptions for metallurgical recoveries, payable metal factors,\nsmelting and refining charges, transportation costs, and royalties. Hence the\nCuEq calculation is essentially based on net smelter return (NSR) values. NSR\nfor each metal is estimated by applying metallurgical recoveries, payable\nfactors, metal prices, and applicable smelting, refining, transportation, and\npenalty charges to the in-situ metal grades. CuEq grades are derived using a\nlinear regression relationship established between copper grade and copper\nNSR, and then calculated by substituting total NSR (Cu + Mo + Ag) for copper\nNSR in the regression equation. The simplified formula is expressed as CuEq\n(%) = Cu (%) + 3.40327 × Mo (%) + 0.00008 × Ag (g/t)\n\nQualified Person\n\nThe scientific and technical content of this news release has been reviewed\nand approved by Mr. Bernard-Olivier Martel, P. Geo. (OGQ 492), an independent\n“qualified person” as defined by National Instrument 43-101 – Standards\nof Disclosure for Mineral Projects (“NI 43-101”).\n\nQuality Assurance / Quality Control\n\nMineralized intervals reported herein are calculated using an average 0.12%\nCuEq lower cut-off over contiguous 20-metre intersections (shorter intervals\nas the case may be at the upper and lower limits of reported intervals).\nIntervals of 10 metres or less are generally not reported unless considered\nmaterial.   True widths are estimated at 80 – 90 % of the reported core\nlength intervals.\n\nOsisko Metals adheres to a strict QA/QC program for core handling, sampling,\nsample transportation and analyses, including insertion of blanks and\nstandards in the sample stream. Drill core is drilled in HQ or NQ diameter and\nsecurely transported to its core processing facility on site, where it is\nlogged, cut and sampled. Samples selected for assay are sealed and shipped to\nALS Canada Ltd.’s preparation facility in Sudbury. Sample preparation\ndetails (code PREP-31DH) are available on the ALS Canada website. Pulps are\nanalyzed at the ALS Canada Ltd. facility in North Vancouver, BC. All samples\nare analyzed by four acid digestion followed by both ICP-AES and ICP-MS for\nCu, Mo and Ag.\n\nAbout Osisko Metals\n\nOsisko Metals Incorporated is a Canadian exploration and development company\ncreating value in the critical metals sector, with a focus on copper and zinc.\nThe Company acquired a 100% interest in the past-producing Gaspé Copper mine\nfrom Glencore Canada Corporation in July 2023. The Gaspé Copper mine site is\nlocated near Murdochville in Québec's Gaspé Peninsula. The Company is\ncurrently focused on resource expansion of the Gaspé Copper deposits, with\ncurrent pit-constrained Measured and Indicated Mineral Resources of 1.83 Bt\naveraging 0.32% CuEq and Inferred Mineral Resources of 239 Mt averaging 0.46%\nCuEq (in compliance with NI 43-101). For more information, see Osisko Metals'\nApril 14, 2026 news release entitled \"Osisko Metals Announces Significant\nIncrease in Mineral Resource at Gaspé Copper\". Gaspé Copper hosts the\nlargest undeveloped copper resource in eastern North America, strategically\nlocated near existing infrastructure in the mining-friendly province of\nQuébec.\n\nIn addition to the Gaspé Copper project, the Company is working with Appian\nCapital Advisory LLP through the Pine Point Mining Limited joint venture to\nadvance one of Canada's largest past-producing zinc mining camps, the Pine\nPoint project, located in the Northwest Territories. The current mineral\nresource estimate for the Pine Point project consists of Indicated Mineral\nResources of 49.5 Mt averaging 5.52% ZnEq and Inferred Mineral Resources of\n8.3 Mt averaging 5.64% ZnEq (in compliance with NI 43-101). For more\ninformation, see Osisko Metals' June 25, 2024 news release entitled \"Osisko\nMetals releases Pine Point mineral resource estimate: 49.5 million tonnes of\nindicated resources at 5.52% ZnEq\". The Pine Point project is located on the\nsouth shore of Great Slave Lake, NWT, close to infrastructure, with paved road\naccess, an electrical substation and 100 kilometres of viable haul roads.\n\nFor further information on this news release, visit www.osiskometals.com or\ncontact:\n\nDon Njegovan, President\nEmail: info@osiskometals.com\nPhone: (416) 500-4129\n\nCautionary Statement on Forward-Looking Information\n\nThis news release contains \"forward-looking information\" within the meaning of\napplicable Canadian securities legislation based on expectations, estimates\nand projections as at the date of this news release. Any statement that\ninvolves predictions, expectations, interpretations, beliefs, plans,\nprojections, objectives, assumptions, future events or performance (often, but\nnot always, using phrases such as \"expects\", or \"does not expect\", \"is\nexpected\", \"interpreted\", “management's view\", \"anticipates\" or \"does not\nanticipate\", \"plans\", \"budget\", \"scheduled\", \"forecasts\", \"estimates\",\n\"potential\", \"feasibility\", \"believes\" or \"intends\" or variations of such\nwords and phrases or stating that certain actions, events or results \"may\" or\n\"could\", \"would\", \"might\" or \"will\" be taken, occur or be achieved) are not\nstatements of historical fact and may be forward-looking information and are\nintended to identify forward-looking information. This news release contains\nforward-looking information pertaining to, among other things: the tax\ntreatment of the FT Units; the timing of incurring the Qualifying Expenditures\nand the renunciation of the Qualifying Expenditures; the ability to advance\nGaspé Copper to a construction decision (if at all); the ability to increase\nthe Company's trading liquidity and enhance its capital markets presence; the\npotential re-rating of the Company; the ability for the Company to unlock the\nfull potential of its assets and achieve success; the ability for the Company\nto create value for its shareholders; the advancement of the Pine Point\nproject; the anticipated resource expansion of the Gaspé Copper system and\nGaspé Copper hosting the largest undeveloped copper resource in eastern North\nAmerica.\n\nForward-looking information is not a guarantee of future performance and is\nbased upon a number of estimates and assumptions of management, in light of\nmanagement's experience and perception of trends, current conditions and\nexpected developments, as well as other factors that management believes to be\nrelevant and reasonable in the circumstances, including, without limitation,\nassumptions about: the ability of exploration results, including drilling, to\naccurately predict mineralization; errors in geological modelling;\ninsufficient data; equity and debt capital markets; future spot prices of\ncopper and zinc; the timing and results of exploration and drilling programs;\nthe accuracy of mineral resource estimates; production costs; political and\nregulatory stability; the receipt of governmental and third party approvals;\nlicenses and permits being received on favourable terms; sustained labour\nstability; stability in financial and capital markets; availability of mining\nequipment and positive relations with local communities and groups.\nForward-looking information involves risks, uncertainties and other factors\nthat could cause actual events, results, performance, prospects and\nopportunities to differ materially from those expressed or implied by such\nforward-looking information. Factors that could cause actual results to differ\nmaterially from such forward-looking information are set out in the Company's\npublic disclosure record on SEDAR+ (www.sedarplus.ca) under Osisko Metals'\nissuer profile. Although the Company believes that the assumptions and factors\nused in preparing the forward-looking information in this news release are\nreasonable, undue reliance should not be placed on such information, which\nonly applies as of the date of this news release, and no assurance can be\ngiven that such events will occur in the disclosed time frames or at all. The\nCompany disclaims any intention or obligation to update or revise any forward-\nlooking information, whether as a result of new information, future events or\notherwise, other than as required by law.\n\nPhotos accompanying this release are available at:\n\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/cc6629b2-8f34-48d3-8299-89887f8ef3c7\n\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/4e997c46-1ce7-4028-a770-c56c8599adef\n\n(https://www.globenewswire.com/NewsRoom/AttachmentNg/c7d850cd-153a-410b-a5ef-b4789fdd9d81)\n20260910 Osisko Metals news release Figure 1/plan view \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/cc6629b2-8f34-48d3-8299-89887f8ef3c7/en)\nGaspé Copper Drill Intercept Highlights September 10, 2026 (plan\nview).20260910 Osisko Metals news release Figure 2/long section \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/4e997c46-1ce7-4028-a770-c56c8599adef/en)\nGaspé Copper Drill Intercept Highlights September 10, 2026 (long section).\n\n\nGlobeNewswire, Inc. 2026","article_body_html":"","raw_payload":{"data":{"id":"nGNX6YLLZZ-20260910","title":"Osisko Intersects 256 Metres Averaging 0.85% Cu at Gaspé","author":"Globe Newswire","ticker":"OM","created":"2026-09-10T10:00:00.458Z","tickers":["OM"],"exchange":"TSX","article_body":"MONTREAL, Sept. 10, 2026 (GLOBE NEWSWIRE) -- Osisko Metals Incorporated (the\n“Company” or “Osisko Metals”) (TSX: OM\n(https://www.globenewswire.com/Tracker?data=4K3X4CEOXdVn-qiv0YWYWCj6y9WjXYhyG_Ljzeymoughi4Xw-yrWmKes53EZjYA8e8BnEKsmGyXdwLUexkAcLcXrnMcWK0EA0xwSrbtiNF6PvO4hTK4HOEysJoAt1upr);\nOTCQX: OMZNF\n(https://www.globenewswire.com/Tracker?data=0LrlqyRCUrgZYULE3VJ3ylubukT2pJFBpuReuCdCl_ZMVkN7BbaD61Q0oJtq39Gvcm49ur2h6hexpb00WFihpU3zCzFNcBODFo6NhAhvYTtkOUjPdwW61m_4oz7rqoGD);\nFRANKFURT: 0B51\n(https://www.globenewswire.com/Tracker?data=DnMYgufmNwocNUEseE3xMq-xmHFVbPRFfNfHEr02fE9RRvrc7JTeHux7Yq0WkSi8JFY4lOvFlWY9rWEuNehzjY2Z7ZbZSrYuDiTuvWN3p1eMVbUlxOE1ywDsb5sSVzEJ))\nis pleased to announce additional new analytical results from the 2026 drill\nprogram at the Gaspé Copper Project, located in the Gaspé Peninsula of\nEastern Québec.\n\nNew results are presented below (see Table 1), including 28 mineralized\nintercepts from 12 drill holes. Reported “infill” intercepts are located\nwithin the 2026 MRE model (see April 14, 2026 news release\n(https://www.globenewswire.com/Tracker?data=Nw8Rpj89dE2wUyjmogJOq9QqgA6j7faZlI7q4j8p3X7e4z8QZk2mK5WRRc1osKb158qsUD0CCG89BcyB924dxc_LwDqdTQNr19Qs6varnJ81NpCRSaeLh8dUKaVKKboPrCQCx6cqv589P-zYq8ZWI0juZWcCtHzVXWYC0Sa0ykmBqcDAKYTvEI22Ww-8B22xXy2r3W_EUgaY3cu1H4NqdeTMnAHyz7OotHGPaM0hiH8=)),\nfocused on upgrading Inferred Mineral Resources to Measured or Indicated\ncategories, as applicable. “Expansion” intercepts are located outside the\n2026 MRE model and comprise either i) in-pit expansion, which offers potential\nto convert in-pit waste into additional resources within the 2026 MRE Whittle\npit; or ii) out-of-pit expansion, consisting of mineralization located outside\nthe 2026 MRE Whittle pit, which may potentially lead to the definition of new\nresources. Some of the reported intercepts may have contiguous shallower\ninfill as well as deeper expansion (noted as “Both”). Maps showing hole\nlocations are available at www.osiskometals.com.\n\nOsisko Metals Chief Executive Officer Robert Wares commented: “We are very\npleased with these excellent new results from the current drilling,\nparticularly the high-grade intercept in hole 30-1228 located 800 metres west\nof the 2026 MRE model. The mineralized system continues to expand beyond the\ncurrent pit limits with noticeable grade improvement in the area around Needle\nMountain. Additionally, infill holes 30-1233 and 30-1235 produced\nbetter-than-average grades at the south end of the 2026 MRE model. New assay\nresults are now being received at a faster pace, and we expect to provide\ncontinuous updates throughout the fall.”\n\n\n\n\nHighlights\n* 256.5 metres averaging 0.85% Cu (Out-of-pit expansion) in DDH 30-1228,\nincluding 28.5 metres averaging 4.74% Cu and 27.4 g/t Ag\n* 257.5 metres averaging 0.39% Cu (Infill) in DDH 30-1235\n* 177.5 metres averaging 0.40% Cu (Infill) in DDH 30-1233\n* 101.0 metres averaging 0.44% Cu (In-pit expansion) in DDH 30-1226\n* 67.7 metres averaging 0.63% Cu (Out-of-pit expansion) in DDH 30-1234\n* 49.7 metres averaging 0.74% Cu (Out-of-pit expansion) in DDH 30-1225\nTable 1: Infill and Expansion Drilling Results\n\n DDH No.      From (m)  To (m)  Length (m)  Cu %  Ag g/t  Mo %    CuEq* %  Type**       \n 30-1224      123.0     151.0   28.0        0.24  2.35    <0.005  0.24     Expansion 1  \n and          318.0     366.0   48.0        0.16  1.28    0.041   0.30     Expansion 1  \n and          390.0     428.0   38.0        0.15  1.44    0.039   0.29     Expansion 1  \n and          546.8     700.0   153.2       0.20  1.58    0.023   0.28     Expansion 2  \n 30-1225      57.0      75.0    18.0        0.14  1.07    <0.005  0.14     Expansion 2  \n and          88.3      141.0   52.7        0.36  2.11    <0.005  0.37     Expansion 2  \n and          178.3     228.0   49.7        0.74  3.86    <0.005  0.75     Expansion 2  \n and          259.5     265.5   6.0         1.19  6.10    <0.005  1.20     Expansion 2  \n 30-1226      43.0      144.0   101.0       0.44  2.35    <0.005  0.45     Expansion 1  \n and          196.5     214.5   18.0        0.31  2.07    <0.005  0.32     Expansion 2  \n and          295.5     324.0   28.5        0.24  2.73    <0.005  0.24     Expansion 2  \n 30-1227      73.0      104.0   31.0        0.20  1.54    <0.005  0.20     Infill       \n and          144.0     172.5   28.5        0.25  2.24    0.005   0.27     Expansion 1  \n and          204.0     226.0   22.0        0.18  1.57    0.014   0.23     Expansion 1  \n and          254.0     277.5   23.5        0.16  1.67    0.008   0.18     Expansion 1  \n 30-1228      33.0      289.5   256.5       0.85  5.13    <0.005  0.86     Expansion 2  \n (including)  199.5     228.0   28.5        4.74  27.4    0.005   4.78     Expansion 2  \n 30-1229      19.5      157.0   137.5       0.34  1.33    <0.005  0.34     Infill       \n 30-1230      195.6     258.0   62.4        0.17  1.12    <0.005  0.17     Expansion 2  \n and          292.2     316.5   24.3        0.22  1.24    <0.005  0.22     Expansion 2  \n 30-1231      184.5     240.0   55.5        0.19  1.98    <0.005  0.19     Expansion 2  \n And          270.6     346.5   75.9        0.28  2.10    <0.005  0.28     Expansion 2  \n 30-1232      30.0      55.0    25.0        0.20  2.42    <0.005  0.20     Expansion 2  \n 30-1233      16.0      193.5   177.5       0.40  2.88    <0.005  0.41     Infill       \n and          222.0     298.5   76.5        0.42  3.91    <0.005  0.43     Infill       \n and          327.0     379.5   52.5        0.35  2.93    <0.005  0.35     Infill       \n 30-1234      135.3     203.0   67.7        0.63  3.22    <0.005  0.64     Expansion 2  \n and          234.0     280.5   46.5        0.29  1.55    <0.005  0.29     Expansion 2  \n 30-1235      47.0      304.5   257.5       0.39  3.60    <0.005  0.40     Infill       \n\n*  See explanatory notes below on copper equivalent values and Quality\nAssurance/Quality Controls.\n**  Infill refers to intercepts within the current MRE model; Expansion 1\nrefers to in-pit intercepts outside of the current MRE model; Expansion 2\nrefers to out-of-pit intercepts outside of the current MRE model. “Both”\nindicates drill holes that have contiguous shallower infill as well as deeper\nexpansion intercepts.\n\nDiscussion\n\nDrill hole 30-1224, located near the core processing facility, approximately\n200 metres west of western limit of the 2026 MRE model, is a northeasterly\ndipping hole that cut four mineralized intervals, the first three being in-pit\nexpansions and the fourth (deepest) interval being the longest and an\nout-of-pit expansion, consisting of 153.2 metres averaging 0.20% Cu, 0.023% Mo\nand 1.58 g/t Ag, extending mineralization in this area to a vertical depth of\n660 metres.\n\nDrill hole 30-1225, located on the western margin of the Needle Mountain pit,\nis an easterly dipping hole that was drilled under the pit wall, threading\nthrough a pillar of the B Zone underground workings and stopping in a stope of\nthe C Zone underground workings. It cut three mineralized intervals (all\nout-of-pit expansions), including 52.7 metres averaging 0.36% Cu and 2.11 g/t\nAg, followed by a deeper interval of 49.7 metres averaging 0.74% Cu and 3.86\ng/t Ag (B Zone level). This hole also intersected a short interval of 6.0\nmetres averaging 1.19% Cu before intersecting the C Zone stopes.\n\nDrill hole 30-1226 is located near the eastern margin of the Needle Mountain\npit, approximately 260 metres southwest of the limit of the 2026 MRE model,\nand tested an area where little mineralization was expected from historical\ndrilling. It is a northeasterly dipping hole that cut three mineralized\nintervals. The first, an in-pit expansion, averaged 0.44% Cu and 2.35 g/t Ag\nover 101.0 metres (mostly oxidized mineralization). The next two intervals\n(out-of-pit expansions below the pit floor) averaged 0.31% Cu and 2.07 g/t Ag\nover 18.0 metres and 0.24% Cu and 2.73 g/t Ag over 28.5 metres, extending\nmineralization in this area to a vertical depth of 305 metres.\n\nDrill hole 30-1227, located near the western margin of the 2026 MRE model, is\na westerly dipping hole designed to better define the boundary of the 2026 MRE\nmodel. It cut four narrow mineralized intervals, the first being an infill\ninterval and the other three being in-pit expansions. The intervals vary from\n22.0 to 31.0 metres wide with grades averaging 0.16% to 0.25% Cu.\nMineralization along this boundary was extended to a vertical depth of 260\nmetres.\n\nDrill hole 30-1228, located on the western margin of the Needle Mountain pit,\nis a southeasterly dipping hole that was drilled under the pit wall, threading\nthrough pillars of both the B Zone and C Zone underground workings. It cut one\nlong mineralized interval (out-of-pit expansion) comprising 256.5 metres\naveraging 0.85% Cu and 5.13 g/t Ag, including a high grade sub-interval of\n28.5 metres averaging 4.74% Cu and 27.4 g/t Ag (C Zone level). Mineralization\nin this drill hole extended 50 metres below the C Zone to a vertical depth of\n275 metres. This drill hole demonstrates the potential for higher grade\nmineralization surrounding old underground workings, within residual pillars,\nbetween the B and C Zones and deeper below the C Zone.\n\nDrill hole 30-1229, located at the southern end of the 2026 MRE model on the\nnorthern flank of Needle East Mountain, is an infill vertical hole that was\ndrilled to test around and under historical underground workings to a level\nbelow the C Zone. This hole intersected 137.5 metres averaging 0.34% Cu and\n1.33 g/t Ag, but failed to drill through the B Zone pillar and consequently\ndid not penetrate either the B nor C Zones.\n\nDrill hole 30-1230, located on the north flank of Needle Mountain on the\nwestern margin of the modelled mineralized system, is a northeasterly dipping\nhole that cut two mineralized intervals (both out-of-pit expansions),\nincluding 62.4 metres averaging 0.17% Cu and 1.12 g/t Ag (above C Zone\nhorizon), followed by a deeper interval of 24.3 metres averaging 0.22% Cu and\n1.24 g/t Ag (below C Zone horizon), extending mineralization in this area to a\nvertical depth of 305 metres. The C Zone horizon in this hole consisted of\nunmineralized marble.\n\nDrill hole 30-1231, located near the southeastern margin of the Needle\nMountain pit, approximately 820 metres southwest of the limit of the 2026 MRE\nmodel, is an easterly dipping hole that cut two mineralized intervals\n(out-of-pit expansions), the first averaging 0.19% Cu and 1.98 g/t Ag over\n55.5 metres (above C Zone horizon), and the second averaging 0.28% Cu and 2.10\ng/t Ag over 75.9 metres (below C Zone horizon), extending mineralization in\nthis area to a vertical depth of 340 metres. The C Zone horizon in this hole\nconsisted of unmineralized marble.\n\nDrill hole 30-1232, located between Needle East and the Needle Mountain pit,\nis a westerly dipping hole that was drilled to test an area where no\nmineralization was expected from historical drilling. This hole intersected\none zone of mineralization consisting of 25.0 metres averaging 0.20% Cu and\n2.42 g/t Ag (out-of-pit expansion), within the Indian Cove Formation, as well\nas several scattered, thin intersections (5 to 10 metres thick) to a vertical\ndepth of 280 metres.\n\nDrill hole 30-1233 is a vertical infill hole located near the southern margin\nof the 2026 MRE model. It was drilled through a pillar of the B Zone\nunderground workings and cut three mineralized intervals from surface that\nreturned 177.5 metres averaging 0.40% Cu and 2.88 g/t Ag (B Zone level and\nabove), followed by 76.5 metres averaging 0.42% Cu and 3.91 g/t Ag (C Zone\nlevel extending to 45 metres below this level), and then a third interval of\n52.5 metres averaging 0.35% Cu and 2.93 g/t Ag (below C Zone level). This hole\nextends mineralization in this area to a vertical depth of 380 metres.\n\nDrill hole 30-1234, located on the northwestern margin of the Needle Mountain\npit, on the western margin of the modelled mineralized system, is a vertical\nhole that extended a 2024 Osisko hole (30-1038) to deeper levels. This hole\ncut two mineralized intervals (both out-of-pit expansions), including 67.7\nmetres averaging 0.63% Cu and 3.22 g/t Ag (B Zone horizon and below), followed\nby a deeper interval of 46.5 metres averaging 0.29% Cu and 1.55 g/t Ag (below\nC Zone horizon), extending mineralization in this area to a vertical depth of\n280 metres. The second interval reports the merged meterage of both holes. The\nC Zone horizon in this hole consisted of unmineralized marble.\n\nDrill hole 30-1235 is a vertical infill hole located near the southern margin\nof the 2026 MRE model, approximately 170 metres southwest of 30-1233. It was\ndrilled through a pillar of the B Zone underground workings and cut one\ncontinuous mineralized interval, from near surface, that returned 257.5 metres\naveraging 0.39% Cu and 3.60 g/t Ag (from B Zone level to below C Zone level).\nThis hole extends mineralization in this area to a vertical depth of 305\nmetres.\n\nMineralization at Gaspé Copper is of porphyry copper/skarn type and occurs as\ndisseminations and stockworks of chalcopyrite with pyrite or pyrrhotite and\nminor bornite and molybdenite. One prograde and at least five retrograde\nvein/stockwork mineralizing events have been recognized at Copper Mountain,\nwhich overprint earlier, stratiform, carbonate replacement skarn and\nporcellanite-hosted mineralization throughout the Gaspé Copper system.\nPorcellanite is a historical mining term used to describe bleached, pale green\nto white potassic-altered hornfels. Subvertical stockwork mineralization\ndominates at Copper Mountain whereas prograde bedding-parallel mineralization,\nwhich is mostly stratigraphically controlled, dominates in the area of lower\nCopper Mountain, Needle Mountain, Needle East, and Copper Brook. High\nmolybdenum grades (up to 0.5% Mo) were locally obtained in both the C Zone and\nE Zone skarns away from Copper Mountain.\n\nThe 2022 to 2024 Osisko Metals drill programs were focused on defining\nopen-pit resources within the Copper Mountain stockwork mineralization (see\nMay 6, 2024 MRE press release\n(https://www.globenewswire.com/Tracker?data=lHoGDhty-iOFqCnZNqWDTV9-hms9NyUX9PmlLagk6yw5UWXzWA274ip86XmFNeEV5BUjdgeUNtayvsDF0MEk94JqT6RLn7R5atUxPPbcNoqsFQ6OJwx0O-sg0TUHzXo0ydbyIZV_kqu8ay42jAQDOAkV3JE2lfYJ_uFTbhPDMERJErjbqifpqnX1Wn7KrbbqtryhIvTjlzRGXaiMGVjCPKTkJ7NN4GYmaPJCDFt7YQjW_jFLiYP5fa82HUmoLvQ-6A23JKoQZpiQeUSMPptIpuYlSLD2wz2sDCdOWyxAn9s=)).\nExtending the resource model south of Copper Mountain into the poorly-drilled\nprograde skarn/porcellanite portion of the system subsequently led to a\nsignificantly increased resource, mostly in the Inferred category (see\nNovember 14, 2024 MRE press release\n(https://www.globenewswire.com/Tracker?data=Dqj0UUTLXGzBC2xBMGTCgEEEoOdjwOx8vanYQ2gi5n_QAXe0NQjoRlfsCjYmhY6t1s-VwJoFxBchcBO-TLwZlolnYU783aW-LuRTUHLYKa59wljqGwz_yQXlEtEkZtMrk7JqEUcZOzMMyKYhQf6c2YfARdgRqGXjGhNuC4G4kgH2lj33PdO6KtvyWcb1af4U58aF3P7IBqY0Ta456USKRXcrvIp1Fh-HNALjdMQgS__nCUDfZD9wvXG1QHJzR00a)),\nand additional drilling in 2025 led to an additional significant increase in\nresources, mostly in the Measured and Indicated categories (see April 14, 2026\nMRE press release\n(https://www.globenewswire.com/Tracker?data=Nw8Rpj89dE2wUyjmogJOq9EJ4UiPgUWcyJqfPLoRpC5TYLlAsnxcXt0poMqr2BwxzTH1ebm9vzgY_1oUYezHvglSbFvwZ4fkPiyicB2-xAnrd8Zy9JHwajsI2_PLowHmPlAGIanu9ufw5dRZhUR5iC32KnI5hCQWtFzNlyEr5eLVU0aNQJfVEN11qhfMuiFkLBJr-xRipe-4xYEBN06W1uUoIwy17FxeFmpMrHECIEI4CtmxMERxYcQ0qSOegrtA)).\n\nThe current drill program is designed to convert the bulk of the remaining\n2026 MRE Inferred resources to Measured and Indicated categories, as well as\ntest the expansion of the overall resource laterally to the west, and to the\nsouth/southwest towards Needle East and Needle Mountain respectively.\n\nTable 2: Drill hole locations\n\n DDH No.  Azimuth (°)   Dip (°)   Length (m)  UTM E   UTM N    Elevation  \n 30-1224  70            -70       741         315787  5425813  569        \n 30-1225  98            -47       266         315352  5425252  734        \n 30-1226  70            -70       435         315961  5425168  701        \n 30-1227  248           -70       339         316101  5425612  571        \n 30-1228  130           -74       345         315357  5425341  725        \n 30-1229  0             -90       162         316420  5425456  612        \n 30-1230  75            -80       354         315463  5425655  634        \n 30-1231  85            -78       384         315408  5425045  772        \n 30-1232  250           -70       354         315978  5425040  727        \n 30-1233  0             -90       489         316360  5425511  585        \n 30-1234  0             -90       321         315394  5425418  722        \n 30-1235  0             -90       447         316282  5425365  629        \n\n\n\nExplanatory note regarding copper-equivalent grades\n\nCopper Equivalent (CuEq) grades are presented for illustrative purposes only\nto express the combined value of copper, molybdenum, and silver as a single\ncopper grade. CuEq grades are calculated using long-term metal prices of\nUS$4.50/lb copper, US$20.00/lb molybdenum, and US$45.00/oz silver, and\nincorporate assumptions for metallurgical recoveries, payable metal factors,\nsmelting and refining charges, transportation costs, and royalties. Hence the\nCuEq calculation is essentially based on net smelter return (NSR) values. NSR\nfor each metal is estimated by applying metallurgical recoveries, payable\nfactors, metal prices, and applicable smelting, refining, transportation, and\npenalty charges to the in-situ metal grades. CuEq grades are derived using a\nlinear regression relationship established between copper grade and copper\nNSR, and then calculated by substituting total NSR (Cu + Mo + Ag) for copper\nNSR in the regression equation. The simplified formula is expressed as CuEq\n(%) = Cu (%) + 3.40327 × Mo (%) + 0.00008 × Ag (g/t)\n\nQualified Person\n\nThe scientific and technical content of this news release has been reviewed\nand approved by Mr. Bernard-Olivier Martel, P. Geo. (OGQ 492), an independent\n“qualified person” as defined by National Instrument 43-101 – Standards\nof Disclosure for Mineral Projects (“NI 43-101”).\n\nQuality Assurance / Quality Control\n\nMineralized intervals reported herein are calculated using an average 0.12%\nCuEq lower cut-off over contiguous 20-metre intersections (shorter intervals\nas the case may be at the upper and lower limits of reported intervals).\nIntervals of 10 metres or less are generally not reported unless considered\nmaterial.   True widths are estimated at 80 – 90 % of the reported core\nlength intervals.\n\nOsisko Metals adheres to a strict QA/QC program for core handling, sampling,\nsample transportation and analyses, including insertion of blanks and\nstandards in the sample stream. Drill core is drilled in HQ or NQ diameter and\nsecurely transported to its core processing facility on site, where it is\nlogged, cut and sampled. Samples selected for assay are sealed and shipped to\nALS Canada Ltd.’s preparation facility in Sudbury. Sample preparation\ndetails (code PREP-31DH) are available on the ALS Canada website. Pulps are\nanalyzed at the ALS Canada Ltd. facility in North Vancouver, BC. All samples\nare analyzed by four acid digestion followed by both ICP-AES and ICP-MS for\nCu, Mo and Ag.\n\nAbout Osisko Metals\n\nOsisko Metals Incorporated is a Canadian exploration and development company\ncreating value in the critical metals sector, with a focus on copper and zinc.\nThe Company acquired a 100% interest in the past-producing Gaspé Copper mine\nfrom Glencore Canada Corporation in July 2023. The Gaspé Copper mine site is\nlocated near Murdochville in Québec's Gaspé Peninsula. The Company is\ncurrently focused on resource expansion of the Gaspé Copper deposits, with\ncurrent pit-constrained Measured and Indicated Mineral Resources of 1.83 Bt\naveraging 0.32% CuEq and Inferred Mineral Resources of 239 Mt averaging 0.46%\nCuEq (in compliance with NI 43-101). For more information, see Osisko Metals'\nApril 14, 2026 news release entitled \"Osisko Metals Announces Significant\nIncrease in Mineral Resource at Gaspé Copper\". Gaspé Copper hosts the\nlargest undeveloped copper resource in eastern North America, strategically\nlocated near existing infrastructure in the mining-friendly province of\nQuébec.\n\nIn addition to the Gaspé Copper project, the Company is working with Appian\nCapital Advisory LLP through the Pine Point Mining Limited joint venture to\nadvance one of Canada's largest past-producing zinc mining camps, the Pine\nPoint project, located in the Northwest Territories. The current mineral\nresource estimate for the Pine Point project consists of Indicated Mineral\nResources of 49.5 Mt averaging 5.52% ZnEq and Inferred Mineral Resources of\n8.3 Mt averaging 5.64% ZnEq (in compliance with NI 43-101). For more\ninformation, see Osisko Metals' June 25, 2024 news release entitled \"Osisko\nMetals releases Pine Point mineral resource estimate: 49.5 million tonnes of\nindicated resources at 5.52% ZnEq\". The Pine Point project is located on the\nsouth shore of Great Slave Lake, NWT, close to infrastructure, with paved road\naccess, an electrical substation and 100 kilometres of viable haul roads.\n\nFor further information on this news release, visit www.osiskometals.com or\ncontact:\n\nDon Njegovan, President\nEmail: info@osiskometals.com\nPhone: (416) 500-4129\n\nCautionary Statement on Forward-Looking Information\n\nThis news release contains \"forward-looking information\" within the meaning of\napplicable Canadian securities legislation based on expectations, estimates\nand projections as at the date of this news release. Any statement that\ninvolves predictions, expectations, interpretations, beliefs, plans,\nprojections, objectives, assumptions, future events or performance (often, but\nnot always, using phrases such as \"expects\", or \"does not expect\", \"is\nexpected\", \"interpreted\", “management's view\", \"anticipates\" or \"does not\nanticipate\", \"plans\", \"budget\", \"scheduled\", \"forecasts\", \"estimates\",\n\"potential\", \"feasibility\", \"believes\" or \"intends\" or variations of such\nwords and phrases or stating that certain actions, events or results \"may\" or\n\"could\", \"would\", \"might\" or \"will\" be taken, occur or be achieved) are not\nstatements of historical fact and may be forward-looking information and are\nintended to identify forward-looking information. This news release contains\nforward-looking information pertaining to, among other things: the tax\ntreatment of the FT Units; the timing of incurring the Qualifying Expenditures\nand the renunciation of the Qualifying Expenditures; the ability to advance\nGaspé Copper to a construction decision (if at all); the ability to increase\nthe Company's trading liquidity and enhance its capital markets presence; the\npotential re-rating of the Company; the ability for the Company to unlock the\nfull potential of its assets and achieve success; the ability for the Company\nto create value for its shareholders; the advancement of the Pine Point\nproject; the anticipated resource expansion of the Gaspé Copper system and\nGaspé Copper hosting the largest undeveloped copper resource in eastern North\nAmerica.\n\nForward-looking information is not a guarantee of future performance and is\nbased upon a number of estimates and assumptions of management, in light of\nmanagement's experience and perception of trends, current conditions and\nexpected developments, as well as other factors that management believes to be\nrelevant and reasonable in the circumstances, including, without limitation,\nassumptions about: the ability of exploration results, including drilling, to\naccurately predict mineralization; errors in geological modelling;\ninsufficient data; equity and debt capital markets; future spot prices of\ncopper and zinc; the timing and results of exploration and drilling programs;\nthe accuracy of mineral resource estimates; production costs; political and\nregulatory stability; the receipt of governmental and third party approvals;\nlicenses and permits being received on favourable terms; sustained labour\nstability; stability in financial and capital markets; availability of mining\nequipment and positive relations with local communities and groups.\nForward-looking information involves risks, uncertainties and other factors\nthat could cause actual events, results, performance, prospects and\nopportunities to differ materially from those expressed or implied by such\nforward-looking information. Factors that could cause actual results to differ\nmaterially from such forward-looking information are set out in the Company's\npublic disclosure record on SEDAR+ (www.sedarplus.ca) under Osisko Metals'\nissuer profile. Although the Company believes that the assumptions and factors\nused in preparing the forward-looking information in this news release are\nreasonable, undue reliance should not be placed on such information, which\nonly applies as of the date of this news release, and no assurance can be\ngiven that such events will occur in the disclosed time frames or at all. The\nCompany disclaims any intention or obligation to update or revise any forward-\nlooking information, whether as a result of new information, future events or\notherwise, other than as required by law.\n\nPhotos accompanying this release are available at:\n\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/cc6629b2-8f34-48d3-8299-89887f8ef3c7\n\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/4e997c46-1ce7-4028-a770-c56c8599adef\n\n(https://www.globenewswire.com/NewsRoom/AttachmentNg/c7d850cd-153a-410b-a5ef-b4789fdd9d81)\n20260910 Osisko Metals news release Figure 1/plan view \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/cc6629b2-8f34-48d3-8299-89887f8ef3c7/en)\nGaspé Copper Drill Intercept Highlights September 10, 2026 (plan\nview).20260910 Osisko Metals news release Figure 2/long section \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/4e997c46-1ce7-4028-a770-c56c8599adef/en)\nGaspé Copper Drill Intercept Highlights September 10, 2026 (long section).\n\n\nGlobeNewswire, Inc. 2026"},"type":"article","timestamp":"2026-09-10T10:00:00.526409688Z","server_sent_at_ms":1789034400526},"received_at":"2026-09-10T10:00:00.623Z","source_url":null},"analysis":{"id":"128842","press_release_id":"140002","analysis_json":{"industry":{"label":"Copper","sector":"Materials"},"redFlags":["Headline 256.5 m intercept includes a narrow 28.5 m high-grade sub-interval (4.74% Cu) within a much longer lower-grade interval — grade distribution risk","Assays are exploration intercepts not yet incorporated into the mineral resource estimate; conversion to resources is not assured","Project remains at exploration stage — per forward-looking statements, advancing Gaspé Copper to a construction decision depends on future results and financing"],"eventType":"operations_update","narrative":"Osisko Metals reported 28 new mineralized intercepts from 12 drill holes at its Gaspé Copper Project in Québec, headlined by 256.5 metres averaging 0.85% Cu in hole 30-1228, including a high-grade sub-interval of 28.5 metres at 4.74% Cu and 27.4 g/t Ag.\n\nInfill holes 30-1235 and 30-1233 delivered wide, consistent intercepts of 257.5 metres at 0.39% Cu and 177.5 metres at 0.40% Cu respectively, supporting the program's goal of converting the bulk of remaining Inferred resources to Measured and Indicated categories.\n\nCEO Robert Wares said the mineralized system continues to expand beyond current pit limits with grade improvement around Needle Mountain, and that faster assay turnaround means continuous updates are expected throughout the fall.","sentiment":"bullish","agentHooks":{"shouldPost":true,"suggestedAngle":"Step-out success at Gaspé Copper: 256 m at 0.85% Cu 800 m west of the resource model signals resource growth and grade upside near Needle Mountain."},"keyFigures":{"customDimensions":{"cutoff":"0.12% CuEq lower cut-off","mre_inferred":"239 Mt at 0.46% CuEq","best_intercept":"256.5 m at 0.85% Cu and 5.13 g/t Ag (DDH 30-1228, out-of-pit expansion)","pine_point_mre":"49.5 Mt at 5.52% ZnEq indicated; 8.3 Mt at 5.64% ZnEq inferred","drill_holes_reported":12,"infill_intercept_1233":"177.5 m at 0.40% Cu","infill_intercept_1235":"257.5 m at 0.39% Cu","high_grade_subinterval":"28.5 m at 4.74% Cu and 27.4 g/t Ag (C Zone level, DDH 30-1228)","mineralized_intercepts":28,"mre_measured_indicated":"1.83 Bt at 0.32% CuEq"}},"quotedText":"We are very\npleased with these excellent new results from the current drilling,\nparticularly the high-grade intercept in hole 30-1228 located 800 metres west\nof the 2026 MRE model.","namedEntities":{"people":[{"name":"Robert Wares","role":"Chief Executive Officer"},{"name":"Bernard-Olivier Martel","role":"Independent qualified person (P. Geo., OGQ 492)"},{"name":"Don Njegovan","role":"President"}],"products":["Gaspé Copper Project","Pine Point project"],"companies":[{"name":"Osisko Metals Incorporated","ticker":"OM","relationship":"filer / issuer"},{"name":"Glencore Canada Corporation","relationship":"previous owner — sold 100% interest in Gaspé Copper mine to Osisko Metals in July 2023"},{"name":"Appian Capital Advisory LLP","relationship":"joint venture partner (Pine Point)"},{"name":"Pine Point Mining Limited","relationship":"joint venture entity with Appian"},{"name":"ALS Canada Ltd.","relationship":"assay laboratory"}],"dollarAmounts":[{"amount":"US$4.50/lb","context":"long-term copper price assumption in CuEq calculation"},{"amount":"US$20.00/lb","context":"long-term molybdenum price assumption in CuEq calculation"},{"amount":"US$45.00/oz","context":"long-term silver price assumption in CuEq calculation"}]},"materialImpact":{"score":3,"reasoning":"Headline step-out intercept of 256.5 m at 0.85% Cu including 28.5 m at 4.74% Cu materially supports resource expansion at the flagship Gaspé Copper project, the filer's core value driver. However, these are exploration assays outside an updated resource estimate or economic study, so impact is meaningful rather than market-moving."},"tickerRelevance":{"others":[{"ticker":"OMZNF","relevance":"same issuer — OTCQX listing"},{"ticker":"0B51","relevance":"same issuer — Frankfurt listing"}],"primary":"OM"},"globalImportance":22,"audienceRelevance":16,"eventTypeSecondary":[],"importanceComponents":{"tickerTier":"micro-cap junior explorer","eventGravity":"exploration drill results (no resource estimate or economic study)","eventQuality":"standout intercept vs. typical program assays","sectorWeight":"materials/copper critical-metals theme","householdBrandBoost":0,"retailFavoriteBoost":"low-moderate — copper/zinc junior with niche retail following"}},"event_type":"operations_update","event_type_secondary":null,"sentiment":"bullish","material_impact_score":3,"narrative":"Osisko Metals reported 28 new mineralized intercepts from 12 drill holes at its Gaspé Copper Project in Québec, headlined by 256.5 metres averaging 0.85% Cu in hole 30-1228, including a high-grade sub-interval of 28.5 metres at 4.74% Cu and 27.4 g/t Ag.\n\nInfill holes 30-1235 and 30-1233 delivered wide, consistent intercepts of 257.5 metres at 0.39% Cu and 177.5 metres at 0.40% Cu respectively, supporting the program's goal of converting the bulk of remaining Inferred resources to Measured and Indicated categories.\n\nCEO Robert Wares said the mineralized system continues to expand beyond current pit limits with grade improvement around Needle Mountain, and that faster assay turnaround means continuous updates are expected throughout the fall.","key_figures":{"customDimensions":{"cutoff":"0.12% CuEq lower cut-off","mre_inferred":"239 Mt at 0.46% CuEq","best_intercept":"256.5 m at 0.85% Cu and 5.13 g/t Ag (DDH 30-1228, out-of-pit expansion)","pine_point_mre":"49.5 Mt at 5.52% ZnEq indicated; 8.3 Mt at 5.64% ZnEq inferred","drill_holes_reported":12,"infill_intercept_1233":"177.5 m at 0.40% Cu","infill_intercept_1235":"257.5 m at 0.39% Cu","high_grade_subinterval":"28.5 m at 4.74% Cu and 27.4 g/t Ag (C Zone level, DDH 30-1228)","mineralized_intercepts":28,"mre_measured_indicated":"1.83 Bt at 0.32% CuEq"}},"named_entities":{"people":[{"name":"Robert Wares","role":"Chief Executive Officer"},{"name":"Bernard-Olivier Martel","role":"Independent qualified person (P. Geo., OGQ 492)"},{"name":"Don Njegovan","role":"President"}],"products":["Gaspé Copper Project","Pine Point project"],"companies":[{"name":"Osisko Metals Incorporated","ticker":"OM","relationship":"filer / issuer"},{"name":"Glencore Canada Corporation","relationship":"previous owner — sold 100% interest in Gaspé Copper mine to Osisko Metals in July 2023"},{"name":"Appian Capital Advisory LLP","relationship":"joint venture partner (Pine Point)"},{"name":"Pine Point Mining Limited","relationship":"joint venture entity with Appian"},{"name":"ALS Canada Ltd.","relationship":"assay laboratory"}],"dollarAmounts":[{"amount":"US$4.50/lb","context":"long-term copper price assumption in CuEq calculation"},{"amount":"US$20.00/lb","context":"long-term molybdenum price assumption in CuEq calculation"},{"amount":"US$45.00/oz","context":"long-term silver price assumption in CuEq calculation"}]},"model_name":"glm-5.3-flash","prompt_hash":"sha256:727b4b9429a443af","schema_hash":"sha256:05005c02d9cffac9","created_at":"2026-09-10T10:01:10.782Z","global_importance":22,"audience_relevance":16,"importance_components":{"tickerTier":"micro-cap junior explorer","eventGravity":"exploration drill results (no resource estimate or economic study)","eventQuality":"standout intercept vs. typical program assays","sectorWeight":"materials/copper critical-metals theme","householdBrandBoost":0,"retailFavoriteBoost":"low-moderate — copper/zinc junior with niche retail following"}},"durationMs":55167,"modelName":"glm-5.3-flash"}}