# Contango Announces Updated Mineral Resource Estimate for Kitsault Valley Project; Indicated Resources Increase 93% to 89.5 Million Silver Equivalent Ounces Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9 Original source: https://orestocks.com/company/CTGO/press-releases/6862388330510021 Publisher: orestocks Original announcement: 2026-09-22T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-22T13:25:34.761Z Atlas analysis updated: 2026-09-22T13:25:34.761Z - Company: Contango Silver and Gold Inc. - Ticker: CTGO - Exchange: Unavailable - Region: Northwest British Columbia - Primary commodity: Silver - Secondary commodities: Gold, Copper, Lead, Zinc - Document categories: Resource update - Extracted: 2026-09-22 13:25:35 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Contango Silver and Gold Inc. announced an updated Mineral Resource Estimate for its Kitsault Valley Project in British Columbia, reporting a 93% increase in Indicated silver equivalent resources to 89.55 million ounces. The estimate, compliant with SEC S-K 1300, incorporates 370 new drill holes and a revised geological interpretation, providing a stronger foundation for future economic assessments. While Indicated resources grew significantly, Inferred resources saw a net decrease due to conversion and revised geological understanding. Reasoning: The updated MRE for the Kitsault Valley Project demonstrates a substantial 93% increase in Indicated silver equivalent resources, driven by extensive new drilling and a robust geological re-interpretation. This significantly de-risks the project and provides a stronger foundation for future economic studies, despite a net decrease in Inferred resources. - Positive factor: Significant increase in Indicated silver equivalent resources \(93%\) - Positive factor: Remodeled geological framework integrating extensive new drilling \(370 holes, 175,264m\) - Positive factor: Expanded high-grade primary silver inventory - Positive factor: Compliance with SEC S-K 1300 reporting standards and QP sign-off - Positive factor: Clear roadmap for future MRE updates and initial assessment - Negative factor: Net decrease in Inferred resources, partly due to conversion and revised interpretation - Negative factor: No Measured Resources or Mineral Reserves reported Facts used in scoring: 40 ## 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 document reports a 93% increase in Indicated AgEq resources, indicating a significant upgrade in resource confidence from Inferred to Indicated categories. Evidence · text > 93% Increase in Indicated AgEq Resources: Indicated Mineral Resources expand to 89.55 million \("M"\) oz silver equivalent \("AgEq"\) **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Indicated tonnage increased by 84.4% from 4.15 Mt to 7.66 Mt compared to the prior estimate. Evidence · table > +84.4% Context: 7.66 **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: Indicated AgEq contained metal increased by 93.1% from 46.37 Moz to 89.55 Moz compared to the prior estimate. Evidence · table > +93.1% Context: 89.55 **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: Dave Larimer, CPG, Vice President, Exploration, is named as the Qualified Person responsible for the estimate. Evidence · text > The scientific and technical information contained in this news release has been reviewed and approved by Dave Larimer, CPG, Vice President, Exploration of Contango. Mr. Larimer is a "qualified person" as defined in Subpart 1300 of Regulation S-K and National Instrument 43-101. **SEC S-K 1300 Compliant** Polarity: positive Story-specific tag Definition: No canonical definition is currently available. Why it applies: The MRE was prepared under Subpart 1300 of U.S. Securities and Exchange Commission Regulation S-K. Evidence · text > prepared under Subpart 1300 of U.S. Securities and Exchange Commission Regulation S-K **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: The resource is reported at a cut-off grade of 132 g/t AgEq. Evidence · text > reported at a cut-off grade of 132 g/t AgEq **Metal Equivalent Opaque** Polarity: positive Story-specific tag Definition: Metal equivalent grade reported without disclosing the price, recovery, or payability assumptions used. Why it applies: Metal equivalent calculations include variable metallurgical recovery assumptions across deposit groups and specific commodity prices, making the assumptions transparent. Evidence · text > Silver-equivalent calculations incorporate variable metallurgical recovery assumptions across deposit groups and use commodity prices of US$53/oz Ag, US$3,500/oz Au, US$5.00/lb Cu, US$1.25/lb Zn and US$0.90/lb Pb. **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 64.92 Moz AgEq in the Inferred category, which is a speculative resource category. Evidence · text > Inferred Mineral Resources of 64.92 Moz AgEq **Tonnage Decline** Polarity: negative Definition: Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down. Why it applies: Inferred tonnage decreased by 7.7% from 6.83 Mt to 6.31 Mt compared to the prior estimate. Evidence · table > -7.7% Context: 6.31 **Contained Metal Decline** Polarity: negative Definition: Contained metal decreased vs prior despite tonnage growth — grade dilution exceeds volume gain. Why it applies: Inferred AgEq contained metal decreased by 25.1% from 86.73 Moz to 64.92 Moz compared to the prior estimate. Evidence · table > -25.1% Context: 64.92 **Maiden Resource** Polarity: neutral Definition: First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. Why it applies: The CEO states that the company plans to work on an initial mining plan for the district with completion of an Initial Assessment later in 2027, indicating the project is still in early economic study stages. Evidence · text > We look forward to incorporating this new data into our 2027 resource update and then working on an initial mining plan for the district with completion of an Initial Assessment later in 2027. **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document explicitly states it is an 'Updated Mineral Resource Estimate' for the Kitsault Valley Project. Evidence · text > Updated Mineral Resource Estimate for Kitsault Valley Project **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: The company plans to complete an S-K 1300 Initial Assessment targeted for later in 2027, which is equivalent to a Preliminary Economic Assessment \(PEA\). Evidence · text > The Company then plans to complete an S-K 1300 Initial Assessment targeted for later in 2027. ## Extracted facts Stored fact records: 40. Some facts used in scoring do not have a stored record. ## Resource Estimates (40) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-0) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:78cae9213b6afff15bd8 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2140000 - Grade: 89.14 - Grade Unit: g/t - Contained Metal: 33.28 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 483.7 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Indicated resource shows a strong silver equivalent grade, contributing significantly to the project's overall Indicated resource growth. - Positive factor: Indicated category provides high confidence - Positive factor: Strong silver equivalent grade - Positive factor: Contributes to significant overall resource increase Evidence · table > 89.14 Context: 2.14 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-1) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:78cae9213b6afff15bd8 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2140000 - Grade: 5.63 - Grade Unit: g/t - Contained Metal: 387.42 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 483.7 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Indicated resource includes a strong gold grade, adding significant value to the polymetallic resource base. - Positive factor: Indicated category provides high confidence - Positive factor: Strong gold grade for an indicated resource - Positive factor: Contributes to polymetallic resource Evidence · table > 5.63 Context: 2.14 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-2) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:78cae9213b6afff15bd8 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2140000 - Grade: 0.13 - Grade Unit: % - Contained Metal: 6.32 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 483.7 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The copper grade in the Homestake Indicated resource is moderate, but contributes to the overall polymetallic nature of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.13 Context: 2.14 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-3) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:78cae9213b6afff15bd8 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2140000 - Grade: 0.15 - Grade Unit: % - Contained Metal: 7.02 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 483.7 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The zinc grade in the Homestake Indicated resource is moderate, but adds to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.15 Context: 2.14 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-4) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:78cae9213b6afff15bd8 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2140000 - Grade: 0.13 - Grade Unit: % - Contained Metal: 5.96 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 483.7 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The lead grade in the Homestake Indicated resource is moderate, but adds to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.13 Context: 2.14 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-5) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d5626f4a36f9c251aa19 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 5520000 - Grade: 296.1 - Grade Unit: g/t - Contained Metal: 56.27 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 317.06 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Indicated resource shows a strong silver equivalent grade, significantly contributing to the project's overall Indicated resource growth. - Positive factor: Indicated category provides high confidence - Positive factor: Strong silver equivalent grade - Positive factor: Major contributor to overall resource increase Evidence · table > 296.1 Context: 5.52 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-6) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d5626f4a36f9c251aa19 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 5520000 - Grade: 0.04 - Grade Unit: g/t - Contained Metal: 7.29 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 317.06 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The gold grade in the Dolly Varden Indicated resource is low, but still contributes to the overall polymetallic nature of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.04 Context: 5.52 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-7) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d5626f4a36f9c251aa19 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 5520000 - Grade: 0.03 - Grade Unit: % - Contained Metal: 3.06 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 317.06 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The copper grade in the Dolly Varden Indicated resource is low, but still contributes to the overall polymetallic nature of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.03 Context: 5.52 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-8) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d5626f4a36f9c251aa19 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 5520000 - Grade: 0.67 - Grade Unit: % - Contained Metal: 81.83 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 317.06 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Indicated resource includes a moderate zinc grade, adding to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Moderate zinc grade - Positive factor: Contributes to polymetallic resource Evidence · table > 0.67 Context: 5.52 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-9) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d5626f4a36f9c251aa19 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 5520000 - Grade: 0.59 - Grade Unit: % - Contained Metal: 72.2 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 317.06 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Indicated resource includes a moderate lead grade, adding to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Moderate lead grade - Positive factor: Contributes to polymetallic resource Evidence · table > 0.59 Context: 5.52 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-10) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:966180cf9a7282bd6762 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 7660000 - Grade: 58.7 - Grade Unit: moz - Contained Metal: 89.55 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 - Prior Tonnes: 4150000 - Prior Contained Metal: 46.37 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Indicated silver equivalent resource shows a substantial increase in contained metal and grade, reflecting successful resource conversion and expansion. - Positive factor: Significant increase in Indicated AgEq contained metal \(+93.1%\) - Positive factor: Strong silver equivalent grade - Positive factor: Indicated category provides high confidence Evidence · table > 58.70 Context: 7.66 #### 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 **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: 7660000 against 4150000 previously **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: 89.55 against 46.37 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-11) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:966180cf9a7282bd6762 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 7660000 - Grade: 1.6 - Grade Unit: g/t - Contained Metal: 394.7 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Indicated gold resource, while moderate in grade, adds significant value to the overall polymetallic resource base. - Positive factor: Indicated category provides high confidence - Positive factor: Moderate gold grade - Positive factor: Contributes to polymetallic resource Evidence · table > 1.60 Context: 7.66 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-12) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:966180cf9a7282bd6762 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 7660000 - Grade: 0.06 - Grade Unit: % - Contained Metal: 9.38 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Indicated copper resource, though low grade, contributes to the overall polymetallic nature of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Contributes to polymetallic resource Evidence · table > 0.06 Context: 7.66 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-13) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:966180cf9a7282bd6762 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 7660000 - Grade: 88.85 - Grade Unit: mlb - Contained Metal: 88.85 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Indicated zinc resource, with a moderate grade, adds to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Moderate zinc grade - Positive factor: Contributes to polymetallic resource Evidence · table > 88.85 Context: 7.66 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-14) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:966180cf9a7282bd6762 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 7660000 - Grade: 78.16 - Grade Unit: mlb - Contained Metal: 78.16 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Indicated lead resource, with a moderate grade, adds to the polymetallic value of the deposit. - Positive factor: Indicated category provides high confidence - Positive factor: Moderate lead grade - Positive factor: Contributes to polymetallic resource Evidence · table > 78.16 Context: 7.66 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-15) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:fdfc2944ae823ed90ba0 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 4600000 - Grade: 53.91 - Grade Unit: g/t - Contained Metal: 48.5 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 328.3 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver equivalent resource shows a moderate grade, contributing to the overall resource base, though with lower confidence. - Positive factor: Moderate silver equivalent grade - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence Evidence · table > 53.91 Context: 4.60 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-16) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:fdfc2944ae823ed90ba0 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 4600000 - Grade: 4.17 - Grade Unit: g/t - Contained Metal: 615.82 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 328.3 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred gold resource shows a strong grade, adding significant value to the polymetallic resource, though with lower confidence. - Positive factor: Strong gold grade for an inferred resource - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 4.17 Context: 4.60 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-17) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:fdfc2944ae823ed90ba0 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 4600000 - Grade: 0.04 - Grade Unit: % - Contained Metal: 4.24 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 328.3 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The copper grade in the Homestake Inferred resource is low, contributing to the polymetallic nature but with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low copper grade Evidence · table > 0.04 Context: 4.60 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-18) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:fdfc2944ae823ed90ba0 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 4600000 - Grade: 0.15 - Grade Unit: % - Contained Metal: 14.69 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 328.3 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The zinc grade in the Homestake Inferred resource is low, contributing to the polymetallic nature but with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low zinc grade Evidence · table > 0.15 Context: 4.60 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-19) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:fdfc2944ae823ed90ba0 - Deposit or zone: Homestake - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 4600000 - Grade: 0.17 - Grade Unit: % - Contained Metal: 16.86 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 328.3 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The lead grade in the Homestake Inferred resource is low, contributing to the polymetallic nature but with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low lead grade Evidence · table > 0.17 Context: 4.60 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-20) Kitsault Valley · silver Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:cf2f93b38fb165f7b8f6 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 1710000 - Grade: 269.91 - Grade Unit: g/t - Contained Metal: 16.42 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 289.65 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Inferred silver equivalent resource shows a moderate grade, contributing to the overall resource base, though with lower confidence. - Positive factor: Moderate silver equivalent grade - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence Evidence · table > 269.91 Context: 1.71 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-21) Kitsault Valley · gold Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:cf2f93b38fb165f7b8f6 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 1710000 - Grade: 0.1 - Grade Unit: g/t - Contained Metal: 4.99 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 289.65 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The gold grade in the Dolly Varden Inferred resource is low, contributing to the polymetallic nature but with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low gold grade Evidence · table > 0.10 Context: 1.71 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-22) Kitsault Valley · copper Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:cf2f93b38fb165f7b8f6 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 1710000 - Grade: 0.05 - Grade Unit: % - Contained Metal: 1.8 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 289.65 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The copper grade in the Dolly Varden Inferred resource is low, contributing to the polymetallic nature but with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low copper grade Evidence · table > 0.05 Context: 1.71 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-23) Kitsault Valley · zinc Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:cf2f93b38fb165f7b8f6 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 1710000 - Grade: 0.9 - Grade Unit: % - Contained Metal: 33.92 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 289.65 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Inferred zinc resource shows a moderate grade, adding to the polymetallic value, though with lower confidence. - Positive factor: Moderate zinc grade - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 0.90 Context: 1.71 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-24) Kitsault Valley · lead Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:cf2f93b38fb165f7b8f6 - Deposit or zone: Dolly Varden - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 1710000 - Grade: 0.62 - Grade Unit: % - Contained Metal: 23.38 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 289.65 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Dolly Varden Inferred lead resource shows a moderate grade, adding to the polymetallic value, though with lower confidence. - Positive factor: Moderate lead grade - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 0.62 Context: 1.71 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-25) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d83b908f516d9315a498 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 6310000 - Grade: 22.8 - Grade Unit: moz - Contained Metal: 64.92 - Contained Unit: moz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 - Prior Tonnes: 6830000 - Prior Contained Metal: 86.73 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Inferred silver equivalent resource shows a net decrease in contained metal and lower confidence, reflecting resource conversion and revised interpretation. - Positive factor: Moderate silver equivalent grade - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Net decrease in Inferred AgEq contained metal \(-25.1%\) Evidence · table > 22.80 Context: 6.31 #### 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 **Tonnage Decline** Polarity: negative Definition: Resource tonnage decreased vs prior estimate — pit optimization removed marginal material or geological model revised down. Why it applies: 6310000 against 6830000 previously **Contained Metal Decline** Polarity: negative Definition: Contained metal decreased vs prior despite tonnage growth — grade dilution exceeds volume gain. Why it applies: 64.92 against 86.73 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-26) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d83b908f516d9315a498 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 6310000 - Grade: 3.06 - Grade Unit: g/t - Contained Metal: 620.82 - Contained Unit: koz - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Inferred gold resource shows a strong grade, adding significant value to the polymetallic resource, though with lower confidence. - Positive factor: Strong gold grade for an inferred resource - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 3.06 Context: 6.31 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-27) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d83b908f516d9315a498 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 6310000 - Grade: 0.04 - Grade Unit: % - Contained Metal: 6.04 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Inferred copper resource, though low grade, contributes to the overall polymetallic nature of the deposit with lower confidence. - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence - Negative factor: Low copper grade Evidence · table > 0.04 Context: 6.31 #### 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 **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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-28) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d83b908f516d9315a498 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 6310000 - Grade: 48.61 - Grade Unit: mlb - Contained Metal: 48.61 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Inferred zinc resource, with a moderate grade, adds to the polymetallic value of the deposit with lower confidence. - Positive factor: Moderate zinc grade - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 48.61¹ Context: 6.31 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-29) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:d83b908f516d9315a498 - Deposit or zone: Project Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 6310000 - Grade: 40.24 - Grade Unit: mlb - Contained Metal: 40.24 - Contained Unit: mlb - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: moz AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The project's total Inferred lead resource, with a moderate grade, adds to the polymetallic value of the deposit with lower confidence. - Positive factor: Moderate lead grade - Positive factor: Contributes to polymetallic resource - Negative factor: Inferred category has lower confidence Evidence · table > 40.24 Context: 6.31 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-30) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:3a84a7e132015a06e322 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 238340000 - Grade: 1.6 - Grade Unit: g/t - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 1.60 Context: 238.34 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-31) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:3a84a7e132015a06e322 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 238340000 - Grade: 0.06 - Grade Unit: g/t - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.06 Context: 238.34 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-32) Kitsault Valley · copper #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:3a84a7e132015a06e322 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 238340000 - Grade: 0.53 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.53 Context: 238.34 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-33) Kitsault Valley · zinc #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:3a84a7e132015a06e322 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 238340000 - Grade: 0.46 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.46 Context: 238.34 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-34) Kitsault Valley · lead #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:3a84a7e132015a06e322 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 238340000 - Grade: 363 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 89.55 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 363.0 Context: 238.34 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-35) Kitsault Valley · silver #### Identity - Project: Kitsault Valley - Commodity: silver - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:7519063783dbeff07d30 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 112500000 - Grade: 3.06 - Grade Unit: g/t - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 3.06 Context: 112.50 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-36) Kitsault Valley · gold #### Identity - Project: Kitsault Valley - Commodity: gold - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:7519063783dbeff07d30 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 112500000 - Grade: 0.04 - Grade Unit: g/t - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.04 Context: 112.50 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-37) Kitsault Valley · copper Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: copper - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:7519063783dbeff07d30 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 112500000 - Grade: 0.35 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.35 Context: 112.50 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-38) Kitsault Valley · zinc Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: zinc - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:7519063783dbeff07d30 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 112500000 - Grade: 0.29 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 0.29 Context: 112.50 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/contango-announces-updated-mineral-resource-estimate-for-kitsault-valley-project--1112f06a-628b-4acf-8823-d95bbfdd11e9#fact-resource-facts-39) Kitsault Valley · lead Historical result Needs review: historical\_restatement #### Identity - Project: Kitsault Valley - Commodity: lead - Region: canada\_bc - Reported Region: Northwest British Columbia - Ticker: CTGO #### Resource scope - Estimate type: resource - Effective date: 2026-09-11T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Dave Larimer - Resource group id: resource:7519063783dbeff07d30 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 112500000 - Grade: 320.26 - Grade Unit: % - Cutoff Grade: 132 - Cutoff Unit: g/t AgEq #### Prior Estimate - Resource Date: 2026-09-11 #### Metal Equivalent - Metal Eq. Grade: 64.92 - Metal Eq. Unit: g/t AgEq - Assumptions Disclosed: Yes #### Location - CRS: NAD83 / UTM Zone 9N - Loc. Confidence: medium #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: The Homestake Inferred silver resource contributes to the overall resource base, but its lower confidence category and grade warrant caution. \(Expanded from multi-commodity resource table for completeness.\) - Positive factor: Contributes to overall resource base - Negative factor: Inferred category has lower confidence - Negative factor: Lower silver grade compared to indicated Evidence · table > 320.26 Context: 112.50 #### 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 **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ## 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.