# Osisko Metals Announces Significant Increase in Mineral Resources at Gaspé Copper Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122 Original source: https://orestocks.com/company/OM.V/press-releases/6787294991672919 Publisher: orestocks Original announcement: 2026-04-14T14:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-01T04:22:55.169Z Atlas analysis updated: 2026-10-01T04:22:55.169Z - Company: Osisko Metals - Ticker: OM - Exchange: TSX - Region: Eastern Quebec - Primary commodity: Copper - Secondary commodities: Molybdenum, Silver - Document categories: Resource update - Extracted: 2026-10-01 04:22:55 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Osisko Metals announced a significant update to the Mineral Resource Estimate for its Gaspé Copper Project in Quebec, reporting 1.83 billion tonnes at 0.27% Cu \(0.32% CuEq\) in the Measured and Indicated categories, and an additional 239 million tonnes at 0.41% Cu \(0.46% CuEq\) in the Inferred category. This update represents a 119% increase in M&I copper metal content over the previous estimate, outlining one of North America's largest undeveloped copper-molybdenum deposits. The company plans further drilling to upgrade Inferred resources and expand the deposit. Reasoning: The updated Mineral Resource Estimate for Gaspé Copper shows a substantial 119% increase in Measured and Indicated copper metal content, positioning it as one of North America's largest undeveloped copper-molybdenum deposits, backed by NI 43-101 compliance and QP sign-off, despite a portion remaining Inferred and a lowered cut-off grade for optimization. - Positive factor: Significant increase in Measured and Indicated copper metal content \(119%\) - Positive factor: Project outlines one of the largest undeveloped copper-molybdenum deposits in North America - Positive factor: Conversion of Inferred resources to Measured and Indicated categories - Positive factor: NI 43-101 compliant and signed off by Qualified Persons - Positive factor: Future drill programs planned to further expand and upgrade resources - Negative factor: Significant portion of the resource remains in the Inferred category - Negative factor: Cut-off grade was lowered for pit optimization, which can inflate tonnage - Negative factor: No economic evaluation of these Mineral Resources has been produced Facts used in scoring: 66 ## Classification and evidence **Category Upgrade** Polarity: positive Definition: Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal. Why it applies: The 2025 drill program successfully converted and expanded the 2024 MRE to the Measured and Indicated resource categories. Evidence · text > The 2025 drill program successfully converted and expanded the 2024 MRE to the Measured and Indicated resource categories **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: The updated M&I Resource represents a 119% increase in copper metal content over the previously reported Indicated Resource. Evidence · text > The updated M&I Resource represents a 119% increase in copper metal content over the previously reported Indicated Resource **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: The updated M&I Resource represents a 119% increase in copper metal content over the previously reported Indicated Resource. Evidence · text > The updated M&I Resource represents a 119% increase in copper metal content over the previously reported Indicated Resource **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: The Mineral Resource Estimate has been prepared and approved by independent qualified persons: Pierre-Luc Richard, P.Geo., François Le Moal, P.Eng., and Christian Laroche, P.Eng. Evidence · text > The Mineral Resource Estimate and other scientific and technical information in this news release has been prepared and approved by independent qualified persons for purposes of NI 43-101: Pierre-Luc Richard, P.Geo., of PLR Resources Inc. with contributions from François Le Moal, P.Eng., of G-Mining for cut-off grade and Pit shell optimization, and Christian Laroche, P.Eng., from Synectiq, for metallurgical parameters. **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The mineral resources disclosed in this news release conform to standards and guidelines in National Instrument 43-101. Evidence · text > The mineral resources disclosed in this news release conform to standards and guidelines in National Instrument 43-101 – Standards of Disclosure for Mineral Projects \(“ NI 43-101 ”\) **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: The mathematical lower cut-off grade for pit shell optimization was reduced from 0.12% Cu to 0.09% CuEq. Evidence · text > Reduction of cut-off grade from 0.12% Cu to 0.09% CuEq **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The announcement provides an updated Mineral Resource Estimate for the Gaspé Copper Project. Evidence · text > Osisko Metals Announces Significant Increase in Mineral Resources at Gaspé Copper **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: The MRE includes a Measured category for copper, molybdenum, and silver. Evidence · table > Measured Context: 136.5 **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: The MRE includes an Indicated category for copper, molybdenum, and silver. Evidence · table > Indicated Context: 1,697.7 **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The MRE includes an Inferred category for copper, molybdenum, and silver. Evidence · table > Inferred Context: 238.8 ## Extracted facts Stored fact records: 66. Some facts used in scoring do not have a stored record. ## Resource Estimates (66) ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-0) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:fd99287142bfb589878e - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 136500000 - Grade: 0.37 - Grade Unit: % - Contained Metal: 512 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Metal Eq. Grade: 0.42 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Measured resource provides high confidence tonnage and grade for copper, contributing positively to the overall resource update and project de-risking. - Positive factor: High confidence Measured category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Contributes to overall significant resource increase Evidence · table > 0.37 Context: 136.5 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-1) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:fd99287142bfb589878e - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 136500000 - Grade: 0.014 - Grade Unit: % - Contained Metal: 19 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in the Measured category provides additional byproduct value, enhancing the overall project economics. - Positive factor: Adds byproduct value to the Measured resource - Positive factor: Contributes to the overall contained metal Evidence · table > 0.014 Context: 136.5 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-2) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:fd99287142bfb589878e - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 136500000 - Grade: 1.98 - Grade Unit: g/t - Contained Metal: 8.7 - Contained Unit: moz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Silver in the Measured category provides additional byproduct value, enhancing the overall project economics. - Positive factor: Adds byproduct value to the Measured resource - Positive factor: Contributes to the overall contained metal Evidence · table > 1.98 Context: 136.5 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-3) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:1701aea6e315075024ba - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1697700000 - Grade: 0.26 - Grade Unit: % - Contained Metal: 4373 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Contained Metal: 2230 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Metal Eq. Grade: 0.32 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Indicated copper resource shows a substantial increase in contained metal, significantly de-risking the project and demonstrating strong growth in a high-confidence category. - Positive factor: Significant increase in contained copper \(119%\) over previous Indicated Resource - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Conversion of Inferred to Indicated category Evidence · table > 0.26 Context: 1,697.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: 4373 against 2230 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-4) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:b7b477b1dbd4869af43c - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1697700000 - Grade: 0.017 - Grade Unit: % - Contained Metal: 286.4 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in the Indicated category provides substantial byproduct value, enhancing the overall project economics and resource scale. - Positive factor: Adds significant byproduct value to the Indicated resource - Positive factor: Contributes to the overall contained metal Evidence · table > 0.017 Context: 1,697.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-5) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:b7b477b1dbd4869af43c - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1697700000 - Grade: 1.54 - Grade Unit: g/t - Contained Metal: 84.1 - Contained Unit: moz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Silver in the Indicated category provides substantial byproduct value, enhancing the overall project economics and resource scale. - Positive factor: Adds significant byproduct value to the Indicated resource - Positive factor: Contributes to the overall contained metal Evidence · table > 1.54 Context: 1,697.7 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-6) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:2b3adcac5b09aa55c83f - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 238800000 - Grade: 0.41 - Grade Unit: % - Contained Metal: 979 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Metal Eq. Grade: 0.46 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Inferred copper resource adds substantial potential for future growth, but its lower confidence category means it cannot yet support economic studies. - Positive factor: Adds significant potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category Evidence · table > 0.41 Context: 238.8 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-7) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:2b3adcac5b09aa55c83f - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 238800000 - Grade: 0.016 - Grade Unit: % - Contained Metal: 37.6 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in the Inferred category provides additional byproduct potential, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Positive factor: Contributes to the overall contained metal - Negative factor: Lower confidence Inferred category Evidence · table > 0.016 Context: 238.8 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-8) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:2b3adcac5b09aa55c83f - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 238800000 - Grade: 1.88 - Grade Unit: g/t - Contained Metal: 14.5 - Contained Unit: moz - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Silver in the Inferred category provides additional byproduct potential, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Positive factor: Contributes to the overall contained metal - Negative factor: Lower confidence Inferred category Evidence · table > 1.88 Context: 238.8 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-9) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:ba17756588f211293f06 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2342000000 - Grade: 0.23 - Grade Unit: % - Contained Metal: 5444 - Contained Unit: kt - Cutoff Grade: 0.09 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.23 Context: 2,342 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.09 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-10) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:ba17756588f211293f06 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2342000000 - Grade: 0.014 - Grade Unit: % - Cutoff Grade: 0.09 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.014 Context: 2,342 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.09 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-11) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f8d7f4531ed3709dce3f - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 287000000 - Grade: 0.36 - Grade Unit: % - Contained Metal: 1027 - Contained Unit: kt - Cutoff Grade: 0.09 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.36 Context: 287 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.09 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-12) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f8d7f4531ed3709dce3f - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 287000000 - Grade: 0.014 - Grade Unit: % - Cutoff Grade: 0.09 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.014 Context: 287 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.09 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-13) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:8d4d27dbf335eae0abe4 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2283000000 - Grade: 0.24 - Grade Unit: % - Contained Metal: 5396 - Contained Unit: kt - Cutoff Grade: 0.1 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.24 Context: 2,283 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.1 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-14) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:8d4d27dbf335eae0abe4 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2283000000 - Grade: 0.014 - Grade Unit: % - Cutoff Grade: 0.1 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.014 Context: 2,283 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.1 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-15) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:3b395f9553b2a87a4e70 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 280000000 - Grade: 0.36 - Grade Unit: % - Contained Metal: 1022 - Contained Unit: kt - Cutoff Grade: 0.1 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.36 Context: 280 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.1 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-16) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:3b395f9553b2a87a4e70 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 280000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.1 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 280 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.1 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-17) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f8cdb75bbe983ffe9de2 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2218000000 - Grade: 0.24 - Grade Unit: % - Contained Metal: 5335 - Contained Unit: kt - Cutoff Grade: 0.11 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.24 Context: 2,218 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.11 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-18) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f8cdb75bbe983ffe9de2 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2218000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.11 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 2,218 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.11 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-19) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:2e4d3ef281fa09a9642a - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 273000000 - Grade: 0.37 - Grade Unit: % - Contained Metal: 1015 - Contained Unit: kt - Cutoff Grade: 0.11 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.37 Context: 273 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.11 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-20) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:2e4d3ef281fa09a9642a - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 273000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.11 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 273 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: 0.11 against 0.12 previously **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-21) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:49acd2289b4d421e6f6b - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2147000000 - Grade: 0.25 - Grade Unit: % - Contained Metal: 5263 - Contained Unit: kt - Cutoff Grade: 0.12 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.25 Context: 2,147 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-22) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:49acd2289b4d421e6f6b - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2147000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.12 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 2,147 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-23) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:13e60a08f1321f754f57 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 265000000 - Grade: 0.38 - Grade Unit: % - Contained Metal: 1008 - Contained Unit: kt - Cutoff Grade: 0.12 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.38 Context: 265 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-24) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:13e60a08f1321f754f57 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 265000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.12 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 265 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-25) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:c80e3e30a8cf0b91602d - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2070000000 - Grade: 0.25 - Grade Unit: % - Contained Metal: 5180 - Contained Unit: kt - Cutoff Grade: 0.13 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.25 Context: 2,070 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-26) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:c80e3e30a8cf0b91602d - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 2070000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.13 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 2,070 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-27) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f3cd1f2e2f4d2fc63b3d - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 259000000 - Grade: 0.39 - Grade Unit: % - Contained Metal: 1002 - Contained Unit: kt - Cutoff Grade: 0.13 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.39 Context: 259 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-28) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f3cd1f2e2f4d2fc63b3d - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 259000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.13 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 259 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-29) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:b60571f1598cdddc7b84 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1993000000 - Grade: 0.26 - Grade Unit: % - Contained Metal: 5089 - Contained Unit: kt - Cutoff Grade: 0.14 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.26 Context: 1,993 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-30) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:b60571f1598cdddc7b84 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1993000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.14 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 1,993 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-31) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:93a4ff9c748cf53072ce - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 253000000 - Grade: 0.39 - Grade Unit: % - Contained Metal: 995 - Contained Unit: kt - Cutoff Grade: 0.14 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.39 Context: 253 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-32) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:93a4ff9c748cf53072ce - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 253000000 - Grade: 0.015 - Grade Unit: % - Cutoff Grade: 0.14 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.015 Context: 253 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-33) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:79a9078861bd5433947d - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1912000000 - Grade: 0.26 - Grade Unit: % - Contained Metal: 4989 - Contained Unit: kt - Cutoff Grade: 0.15 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.26 Context: 1,912 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-34) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:79a9078861bd5433947d - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1912000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.15 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 1,912 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-35) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:04cfaf94424e6e5c4c3e - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 246000000 - Grade: 0.4 - Grade Unit: % - Contained Metal: 988 - Contained Unit: kt - Cutoff Grade: 0.15 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.40 Context: 246 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-36) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:04cfaf94424e6e5c4c3e - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 246000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.15 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 246 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-37) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:7b91b57191fb98f3bf43 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1834000000 - Grade: 0.27 - Grade Unit: % - Contained Metal: 4885 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.27 Context: 1,834 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-38) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:7b91b57191fb98f3bf43 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1834000000 - Grade: 0.017 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.017 Context: 1,834 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-39) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:565d0e45309c7a3c02ad - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 239000000 - Grade: 0.41 - Grade Unit: % - Contained Metal: 979.3 - Contained Unit: kt - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.41 Context: 239 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-40) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:565d0e45309c7a3c02ad - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 239000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 239 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-41) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:36761e0efa87c34f2187 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1755000000 - Grade: 0.27 - Grade Unit: % - Contained Metal: 4774 - Contained Unit: kt - Cutoff Grade: 0.17 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.27 Context: 1,755 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-42) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:36761e0efa87c34f2187 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1755000000 - Grade: 0.017 - Grade Unit: % - Cutoff Grade: 0.17 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.017 Context: 1,755 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-43) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:0149305ea4fa2ae24d87 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 231000000 - Grade: 0.42 - Grade Unit: % - Contained Metal: 969 - Contained Unit: kt - Cutoff Grade: 0.17 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.42 Context: 231 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-44) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:0149305ea4fa2ae24d87 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 231000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.17 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 231 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-45) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:58802bf546dec55cc317 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1676000000 - Grade: 0.28 - Grade Unit: % - Contained Metal: 4658 - Contained Unit: kt - Cutoff Grade: 0.18 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.28 Context: 1,676 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-46) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:58802bf546dec55cc317 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1676000000 - Grade: 0.017 - Grade Unit: % - Cutoff Grade: 0.18 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.017 Context: 1,676 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-47) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:1cf2ad43d30b75f7423a - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 224000000 - Grade: 0.43 - Grade Unit: % - Contained Metal: 960 - Contained Unit: kt - Cutoff Grade: 0.18 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.43 Context: 224 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-48) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:1cf2ad43d30b75f7423a - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 224000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.18 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 224 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-49) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:505a4d00a3570be40bdb - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1597000000 - Grade: 0.28 - Grade Unit: % - Contained Metal: 4536 - Contained Unit: kt - Cutoff Grade: 0.19 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.28 Context: 1,597 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-50) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:505a4d00a3570be40bdb - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1597000000 - Grade: 0.018 - Grade Unit: % - Cutoff Grade: 0.19 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.018 Context: 1,597 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-51) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:5326ff8e8b9f37f11b40 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 217000000 - Grade: 0.44 - Grade Unit: % - Contained Metal: 950 - Contained Unit: kt - Cutoff Grade: 0.19 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.44 Context: 217 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-52) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:5326ff8e8b9f37f11b40 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 217000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.19 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 217 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-53) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:5735c7790be4b79ee614 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1517000000 - Grade: 0.29 - Grade Unit: % - Contained Metal: 4408 - Contained Unit: kt - Cutoff Grade: 0.2 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows a large Indicated copper resource at a lower cut-off, demonstrating significant tonnage potential, though at a slightly lower grade. - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.29 Context: 1,517 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-54) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:5735c7790be4b79ee614 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 1517000000 - Grade: 0.018 - Grade Unit: % - Cutoff Grade: 0.2 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct value to the large Indicated resource, contributing to overall project economics. - Positive factor: Adds byproduct value to the Indicated resource - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.018 Context: 1,517 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-55) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f11d9996a3f7663ab29e - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 208000000 - Grade: 0.45 - Grade Unit: % - Contained Metal: 938 - Contained Unit: kt - Cutoff Grade: 0.2 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: This sensitivity case shows additional Inferred copper resource at a lower cut-off, indicating further potential but with lower confidence and grade. - Positive factor: Adds potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.45 Context: 208 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-56) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:f11d9996a3f7663ab29e - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 208000000 - Grade: 0.016 - Grade Unit: % - Cutoff Grade: 0.2 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 - Prior Cutoff Grade: 0.12 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: Molybdenum in this sensitivity case adds byproduct potential to the Inferred resource, but its lower confidence limits immediate economic impact. - Positive factor: Adds byproduct value to the Inferred resource - Negative factor: Lower confidence Inferred category - Negative factor: Lower cut-off grade compared to base case Evidence · table > 0.016 Context: 208 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-57) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:ef8eb9e17f19ce11f0ff - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 11710000 - Grade: 0.42 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 136.5 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Measured resource provides high confidence tonnage and grade for copper, contributing positively to the overall resource update and project de-risking. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: High confidence Measured category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Contributes to overall significant resource increase Evidence · table > 0.42 Context: $11.71 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-58) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:ef8eb9e17f19ce11f0ff - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 11710000 - Grade: 0.37 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 136.5 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Measured resource provides high confidence tonnage and grade for copper, contributing positively to the overall resource update and project de-risking. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: High confidence Measured category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Contributes to overall significant resource increase Evidence · table > 0.37 Context: $11.71 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-59) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:ef8eb9e17f19ce11f0ff - Mining method: open\_pit #### Resource Data - Category: measured - Tonnes: 11710000 - Grade: 0.014 - Grade Unit: g/t - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 136.5 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Measured resource provides high confidence tonnage and grade for copper, contributing positively to the overall resource update and project de-risking. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: High confidence Measured category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Contributes to overall significant resource increase Evidence · table > 0.014 Context: $11.71 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-60) Gaspé Copper Project · copper #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:19242812bf59ce8aac97 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 11710000 - Grade: 0.32 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 1834.2 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Indicated copper resource shows a substantial increase in contained metal, significantly de-risking the project and demonstrating strong growth in a high-confidence category. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Significant increase in contained copper \(119%\) over previous Indicated Resource - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Conversion of Inferred to Indicated category Evidence · table > 0.32 Context: $ 11.71 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-61) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:19242812bf59ce8aac97 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 11710000 - Grade: 0.27 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 1834.2 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Indicated copper resource shows a substantial increase in contained metal, significantly de-risking the project and demonstrating strong growth in a high-confidence category. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Significant increase in contained copper \(119%\) over previous Indicated Resource - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Conversion of Inferred to Indicated category Evidence · table > 0.27 Context: $ 11.71 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-62) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:19242812bf59ce8aac97 - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 11710000 - Grade: 0.017 - Grade Unit: g/t - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 1834.2 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Indicated copper resource shows a substantial increase in contained metal, significantly de-risking the project and demonstrating strong growth in a high-confidence category. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Significant increase in contained copper \(119%\) over previous Indicated Resource - Positive factor: Large tonnage in the Indicated category - Positive factor: Good grade for a porphyry copper deposit - Positive factor: Conversion of Inferred to Indicated category Evidence · table > 0.017 Context: $ 11.71 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-63) Gaspé Copper Project · copper Historical result Needs review: historical\_restatement #### Identity - Project: Gaspé Copper Project - Commodity: copper - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:89aeef70ea3488265ed4 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 11710000 - Grade: 0.46 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 238.8 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Inferred copper resource adds substantial potential for future growth, but its lower confidence category means it cannot yet support economic studies. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Adds significant potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category Evidence · table > 0.46 Context: $11.71 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-64) Gaspé Copper Project · molybdenum #### Identity - Project: Gaspé Copper Project - Commodity: molybdenum - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:89aeef70ea3488265ed4 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 11710000 - Grade: 0.41 - Grade Unit: % - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 238.8 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Inferred copper resource adds substantial potential for future growth, but its lower confidence category means it cannot yet support economic studies. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Adds significant potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category Evidence · table > 0.41 Context: $11.71 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/osisko-metals-announces-significant-increase-in-mineral-resources-at-gaspe-coppe--55637d81-7beb-424d-be4f-cef7fb50e122#fact-resource-facts-65) Gaspé Copper Project · silver #### Identity - Project: Gaspé Copper Project - Commodity: silver - Region: canada\_qc - Reported Region: Eastern Quebec - Ticker: OM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Pierre-Luc Richard, François Le Moal, Christian Laroche - Resource group id: resource:89aeef70ea3488265ed4 - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 11710000 - Grade: 0.016 - Grade Unit: g/t - Cutoff Grade: 0.16 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-01-17 #### Metal Equivalent - Metal Eq. Grade: 238.8 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-14T00:00:00.000Z Reasoning: The Inferred copper resource adds substantial potential for future growth, but its lower confidence category means it cannot yet support economic studies. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Adds significant potential for future resource growth - Positive factor: Good grade for a porphyry copper deposit - Negative factor: Lower confidence Inferred category Evidence · table > 0.016 Context: $11.71 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.