# lAMGOLD Reports Mineral Resources and Reserves for the Year Ended 2025

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20

Original source: https://money.tmx.com/en/quote/IMG/news/7553918133800361/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025

Publisher: tmx

Original announcement: 2026-02-17T22:59:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: IAMGOLD Corporation

- Ticker: IMG

- Exchange: TSX

- Region: Unavailable

- Primary commodity: Gold

- Secondary commodities: None reported

- Document categories: Resource update

- Extracted: 2026-08-21 02:13:16 UTC

Narrative sentiment: 0.30 · Bullish

## Minestarters Atlas summary

IAMGOLD Corporation announced its updated Mineral Resources and Mineral Reserves as of December 31, 2025. The company reported a 7% decrease in Proven and Probable Mineral Reserves to 9.9 million ounces of gold, primarily due to depletion at Côté Gold and Essakane. Conversely, Measured and Indicated Mineral Resources increased by 16% to 31.0 million ounces, driven by resource conversion at Gosselin and Nelligan, and the acquisition of the Philibert and Chevrier deposits.

Reasoning: IAMGOLD reported a mixed update with a decrease in overall gold reserves due to depletion, but a significant increase in Measured and Indicated resources driven by resource conversion and new acquisitions. While the resource base expanded, some projects showed dilutive growth with lower grades, and cut-off grade changes were varied. The inclusion of new projects and resource upgrades are positive for future potential, but reserve depletion is a near-term concern.

- Positive factor: Significant increase in Measured and Indicated Mineral Resources \(16% or 4.3 million ounces\) driven by conversion of Inferred resources and new acquisitions.

- Positive factor: Acquisition of Philibert and Chevrier deposits adds new resources to the portfolio.

- Positive factor: Category upgrades from Inferred to Indicated at Gosselin \(Côté Gold\) and Nelligan improve resource confidence.

- Positive factor: Overall M&I resource base positions the company among the largest gold endowments for mid-tier producers.

- Negative factor: Overall Proven and Probable Mineral Reserves decreased by 7% \(796,000 ounces\) primarily due to depletion.

- Negative factor: Average grade of total M&I resources decreased by 5% and total P&P reserves decreased by 2%.

- Negative factor: Some M&I resource increases \(Essakane, Westwood\) are dilutive, with significant tonnage growth but lower average grades.

- Negative factor: Côté Gold reserves cut-off grade increased, potentially reducing economic material.

- Negative factor: Diakha-Siribaya resources are unchanged and the sale agreement for the project expired, indicating uncertainty.

Facts used in scoring: 32

## Classification and evidence

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: The document provides an updated Mineral Resources and Mineral Reserves statement as of December 31, 2025.

Evidence · text

> IAMGOLD Reports Mineral Resources and Reserves for the Year Ended 2025

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: The statement was prepared in accordance with National Instrument 43-101.

Evidence · text

> prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects \("NI 43-101"\).

**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: Christine Beausoleil, P.Geo., and Adrienne Rispoli, P.Eng., are named as 'qualified persons' responsible for the estimates.

Evidence · text

> Christine Beausoleil, P.Geo., Senior Director, Mining Geology, IAMGOLD Corporation is the "qualified person" for the purposes of NI 43-101 \("QP"\) with respect to the mineralization being reported on and is responsible for the review and approval of all Mineral Resources estimates for IAMGOLD. Adrienne Rispoli, P.Eng., Senior Director, Mining & Integrated Planning, IAMGOLD Corporation is the QP for the purposes of NI 43-101 with respect to the mineralization being reported on and is responsible for the review and approval of all Mineral Reserves estimates for IAMGOLD.

## Extracted facts

Stored fact records: 32. Some facts used in scoring do not have a stored record.

## Resource Estimates (32)

### proven

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-0)

Côté Gold · gold

#### Identity

- Project: Côté Gold
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: proven
- Tonnes: 116055000
- Grade: 1.05
- Grade Unit: g/t
- Contained Metal: 3902000
- Contained Unit: oz
- Cutoff Grade: 0.46

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Proven reserves at Côté Gold decreased by 11% in contained ounces, and the cut-off grade increased, indicating a reduction in economically viable material.

- Negative factor: Contained metal decreased by 11% compared to the prior year.

- Negative factor: Cut-off grade increased from 0.35 g/t Au to 0.46 g/t Au, which can reduce reported tonnage.

Evidence · table

> 1.05

Context: 116,055

### probable

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-1)

Côté Gold · gold

#### Identity

- Project: Côté Gold
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: probable
- Tonnes: 101112000
- Grade: 0.97
- Grade Unit: g/t
- Contained Metal: 3139000
- Contained Unit: oz
- Cutoff Grade: 0.46

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Probable reserves at Côté Gold increased by 6% in contained ounces, but the cut-off grade also increased, which could impact overall economic viability.

- Positive factor: Contained metal increased by 6% compared to the prior year.

- Negative factor: Cut-off grade increased from 0.35 g/t Au to 0.46 g/t Au, which can reduce reported tonnage.

Evidence · table

> 0.97

Context: 101,112

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-2)

Côté Gold · gold

#### Identity

- Project: Côté Gold
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: measured
- Tonnes: 153873000
- Grade: 0.93
- Grade Unit: g/t
- Contained Metal: 4598000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Measured resources at Côté Gold decreased by 6% in contained ounces, indicating a reduction in the highest confidence category.

- Negative factor: Contained metal decreased by 6% compared to the prior year.

Evidence · table

> 0.93

Context: 153,873

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-3)

Côté Gold · gold

#### Identity

- Project: Côté Gold
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 268833000
- Grade: 0.77
- Grade Unit: g/t
- Contained Metal: 6697000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Côté Gold decreased by 3% in contained ounces, indicating a slight reduction in this resource category.

- Negative factor: Contained metal decreased by 3% compared to the prior year.

Evidence · table

> 0.77

Context: 268,833

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-4)

Côté Gold · gold

#### Identity

- Project: Côté Gold
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 62760000
- Grade: 0.6
- Grade Unit: g/t
- Contained Metal: 1206000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Côté Gold increased slightly by 2% in contained ounces.

- Positive factor: Contained metal increased by 2% compared to the prior year.

Evidence · table

> 0.60

Context: 62,760

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-5)

Gosselin · gold

#### Identity

- Project: Gosselin
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 266741000
- Grade: 0.8
- Grade Unit: g/t
- Contained Metal: 6861000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Gosselin Indicated resources showed substantial growth in contained metal and tonnage, largely due to the conversion of Inferred resources, significantly improving confidence in this part of the Côté Gold project.

- Positive factor: Contained metal increased significantly by 55% compared to the prior year.

- Positive factor: Tonnage increased by 65%, indicating substantial growth.

- Positive factor: Conversion of Inferred Mineral Resources to Indicated category improves resource confidence.

- Negative factor: Average grade decreased by 6%.

Evidence · table

> 0.80

Context: 266,741

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-6)

Gosselin · gold

#### Identity

- Project: Gosselin
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 37840000
- Grade: 0.79
- Grade Unit: g/t
- Contained Metal: 959000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Gosselin saw a substantial decrease in both tonnage and contained metal, primarily due to successful conversion to the Indicated category, which is a positive for overall resource confidence but reduces the Inferred base.

- Positive factor: Average grade increased by 5%.

- Negative factor: Contained metal decreased significantly by 68% compared to the prior year.

- Negative factor: Tonnage decreased by 69%, indicating a substantial reduction in Inferred resources, likely due to conversion to Indicated.

Evidence · table

> 0.79

Context: 37,840

### proven

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-7)

Westwood · gold

#### Identity

- Project: Westwood
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: proven
- Tonnes: 1555000
- Grade: 6.63
- Grade Unit: g/t
- Contained Metal: 331000
- Contained Unit: oz
- Cutoff Grade: 6.4

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Proven reserves at Westwood increased in contained ounces and tonnage, but with a notable decrease in average grade, partially offset by a lower cut-off grade for underground operations.

- Positive factor: Contained metal increased by 8% compared to the prior year.

- Positive factor: Tonnage increased by 25%.

- Negative factor: Average grade decreased by 14%.

Evidence · table

> 6.63

Context: 1,555

### probable

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-8)

Westwood · gold

#### Identity

- Project: Westwood
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: probable
- Tonnes: 3803000
- Grade: 6.68
- Grade Unit: g/t
- Contained Metal: 817000
- Contained Unit: oz
- Cutoff Grade: 6.4

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Probable reserves at Westwood showed strong growth in contained ounces and tonnage, despite a decrease in average grade, supported by a lower cut-off grade for underground operations.

- Positive factor: Contained metal increased by 15% compared to the prior year.

- Positive factor: Tonnage increased by 36%.

- Negative factor: Average grade decreased by 15%.

Evidence · table

> 6.68

Context: 3,803

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-9)

Westwood · gold

#### Identity

- Project: Westwood
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: measured
- Tonnes: 1619000
- Grade: 7.21
- Grade Unit: g/t
- Contained Metal: 375000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Measured resources at Westwood increased significantly in contained ounces and tonnage, but with a substantial decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 20% compared to the prior year.

- Positive factor: Tonnage increased by 52%.

- Negative factor: Average grade decreased by 21%.

Evidence · table

> 7.21

Context: 1,619

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-10)

Westwood · gold

#### Identity

- Project: Westwood
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 10324000
- Grade: 6.09
- Grade Unit: g/t
- Contained Metal: 2022000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Westwood showed strong growth in contained ounces and tonnage, despite a significant decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased significantly by 44% compared to the prior year.

- Positive factor: Tonnage increased by 83%.

- Negative factor: Average grade decreased by 21%.

Evidence · table

> 6.09

Context: 10,324

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-11)

Westwood · gold

#### Identity

- Project: Westwood
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 4507000
- Grade: 10.46
- Grade Unit: g/t
- Contained Metal: 1515000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Westwood saw a decrease in contained ounces and average grade, despite a slight increase in tonnage, indicating a reduction in the overall quality of the inferred resource.

- Positive factor: Tonnage increased by 3%.

- Negative factor: Contained metal decreased by 16% compared to the prior year.

- Negative factor: Average grade decreased by 18%.

Evidence · table

> 10.46

Context: 4,507

### proven

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-12)

Essakane · gold

#### Identity

- Project: Essakane
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: proven
- Tonnes: 22178000
- Grade: 0.64
- Grade Unit: g/t
- Contained Metal: 457000
- Contained Unit: oz
- Cutoff Grade: 0.31

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Proven reserves at Essakane increased in contained ounces and tonnage, despite a slight decrease in average grade, supported by a lower cut-off grade range.

- Positive factor: Contained metal increased by 15% compared to the prior year.

- Positive factor: Tonnage increased by 17%.

- Negative factor: Average grade decreased by 2%.

Evidence · table

> 0.64

Context: 22,178

### probable

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-13)

Essakane · gold

#### Identity

- Project: Essakane
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: probable
- Tonnes: 34903000
- Grade: 1.09
- Grade Unit: g/t
- Contained Metal: 1219000
- Contained Unit: oz
- Cutoff Grade: 0.31

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Probable reserves at Essakane saw a substantial decrease in contained ounces, tonnage, and average grade, indicating significant depletion and/or model adjustments.

- Positive factor: Cut-off grade range decreased, potentially allowing more material to be included.

- Negative factor: Contained metal decreased significantly by 36% compared to the prior year.

- Negative factor: Tonnage decreased by 21%.

- Negative factor: Average grade decreased by 20%.

Evidence · table

> 1.09

Context: 34,903

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-14)

Essakane · gold

#### Identity

- Project: Essakane
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: measured
- Tonnes: 38312000
- Grade: 0.52
- Grade Unit: g/t
- Contained Metal: 640000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Measured resources at Essakane showed strong growth in contained ounces and tonnage, despite a decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 48% compared to the prior year.

- Positive factor: Tonnage increased by 81%.

- Negative factor: Average grade decreased by 18%.

Evidence · table

> 0.52

Context: 38,312

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-15)

Essakane · gold

#### Identity

- Project: Essakane
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 111683000
- Grade: 1.05
- Grade Unit: g/t
- Contained Metal: 3772000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Essakane showed growth in contained ounces and significant tonnage, but with a substantial decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 7% compared to the prior year.

- Positive factor: Tonnage increased by 42%.

- Negative factor: Average grade decreased by 25%.

Evidence · table

> 1.05

Context: 111,683

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-16)

Essakane · gold

#### Identity

- Project: Essakane
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 24195000
- Grade: 1.1
- Grade Unit: g/t
- Contained Metal: 853000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Essakane showed growth in contained ounces and significant tonnage, but with a substantial decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 20% compared to the prior year.

- Positive factor: Tonnage increased by 92%.

- Negative factor: Average grade decreased by 38%.

Evidence · table

> 1.10

Context: 24,195

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-17)

Gossey · gold

#### Identity

- Project: Gossey
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 14795000
- Grade: 0.75
- Grade Unit: g/t
- Contained Metal: 355000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Gossey showed strong growth in contained ounces and tonnage, despite a decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 51% compared to the prior year.

- Positive factor: Tonnage increased by 76%.

- Negative factor: Average grade decreased by 14%.

Evidence · table

> 0.75

Context: 14,795

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-18)

Gossey · gold

#### Identity

- Project: Gossey
- Commodity: gold
- Region: burkina\_faso
- Reported Region: Burkina Faso
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 2688000
- Grade: 0.85
- Grade Unit: g/t
- Contained Metal: 74000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Gossey showed growth in contained ounces and tonnage, despite a decrease in average grade, indicating dilutive growth.

- Positive factor: Contained metal increased by 42% compared to the prior year.

- Positive factor: Tonnage increased by 67%.

- Negative factor: Average grade decreased by 15%.

Evidence · table

> 0.85

Context: 2,688

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-19)

Nelligan · gold

#### Identity

- Project: Nelligan
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 122000000
- Grade: 0.95
- Grade Unit: g/t
- Contained Metal: 3700000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Nelligan showed strong growth in contained ounces and tonnage, driven by an infill drilling program that upgraded Inferred resources, significantly improving confidence.

- Positive factor: Contained metal increased by 18% compared to the prior year.

- Positive factor: Tonnage increased by 19%.

- Positive factor: Increase is a result of an infill program to increase confidence in Inferred resources, leading to category upgrade.

Evidence · table

> 0.95

Context: 122,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-20)

Nelligan · gold

#### Identity

- Project: Nelligan
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 151000000
- Grade: 0.96
- Grade Unit: g/t
- Contained Metal: 4647000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Nelligan decreased in both tonnage and contained ounces, likely due to the conversion of resources to the Indicated category.

- Negative factor: Contained metal decreased by 10% compared to the prior year.

- Negative factor: Tonnage decreased by 9%.

Evidence · table

> 0.96

Context: 151,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-21)

Monster Lake · gold

#### Identity

- Project: Monster Lake
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 243000
- Grade: 13.04
- Grade Unit: g/t
- Contained Metal: 102000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Monster Lake showed an increase in contained ounces and average grade, indicating positive development for this smaller deposit.

- Positive factor: Contained metal increased compared to the prior year.

- Positive factor: Average grade increased.

Evidence · table

> 13.04

Context: 243

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-22)

Monster Lake · gold

#### Identity

- Project: Monster Lake
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 1046000
- Grade: 14.83
- Grade Unit: g/t
- Contained Metal: 499000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Monster Lake showed a slight increase in contained ounces and average grade, indicating stable or slightly improving potential.

- Positive factor: Contained metal increased by 2% compared to the prior year.

- Positive factor: Average grade increased by 3%.

Evidence · table

> 14.83

Context: 1,046

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-23)

Philibert · gold

#### Identity

- Project: Philibert
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 7884000
- Grade: 1.1
- Grade Unit: g/t
- Contained Metal: 279000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Philibert's Indicated resources represent a new addition to the company's portfolio through acquisition, marking a maiden resource for the project and adding new potential.

- Positive factor: New resource added through acquisition, representing significant new potential.

- Positive factor: Maiden resource for the company at this project.

Evidence · table

> 1.10

Context: 7,884

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-24)

Philibert · gold

#### Identity

- Project: Philibert
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 48465000
- Grade: 1.1
- Grade Unit: g/t
- Contained Metal: 1709000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Philibert's Inferred resources represent a new addition to the company's portfolio through acquisition, marking a maiden resource for the project and adding new potential.

- Positive factor: New resource added through acquisition, representing significant new potential.

- Positive factor: Maiden resource for the company at this project.

Evidence · table

> 1.10

Context: 48,465

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-25)

Chevrier · gold

#### Identity

- Project: Chevrier
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 6400000
- Grade: 1.26
- Grade Unit: g/t
- Contained Metal: 260000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Chevrier's Indicated resources represent a new addition to the company's portfolio through acquisition, marking a maiden resource for the project and adding new potential.

- Positive factor: New resource added through acquisition, representing significant new potential.

- Positive factor: Maiden resource for the company at this project.

Evidence · table

> 1.26

Context: 6,400

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-26)

Chevrier · gold

#### Identity

- Project: Chevrier
- Commodity: gold
- Region: canada
- Reported Region: Canada
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 15660000
- Grade: 1.3
- Grade Unit: g/t
- Contained Metal: 652000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Chevrier's Inferred resources represent a new addition to the company's portfolio through acquisition, marking a maiden resource for the project and adding new potential.

- Positive factor: New resource added through acquisition, representing significant new potential.

- Positive factor: Maiden resource for the company at this project.

Evidence · table

> 1.30

Context: 15,660

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-27)

Diakha-Siribaya · gold

#### Identity

- Project: Diakha-Siribaya
- Commodity: gold
- Region: mali
- Reported Region: Mali
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 27937000
- Grade: 1.48
- Grade Unit: g/t
- Contained Metal: 1325000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Indicated resources at Diakha-Siribaya are unchanged from the prior year, and the expired sale agreement raises concerns about the project's future.

- Negative factor: Resources are unchanged from the prior year, indicating no new development.

- Negative factor: Sale agreement for the project expired, creating uncertainty about its future.

Evidence · table

> 1.48

Context: 27,937

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-28)

Diakha-Siribaya · gold

#### Identity

- Project: Diakha-Siribaya
- Commodity: gold
- Region: mali
- Reported Region: Mali
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 8468000
- Grade: 1.53
- Grade Unit: g/t
- Contained Metal: 417000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Inferred resources at Diakha-Siribaya are unchanged from the prior year, and the expired sale agreement raises concerns about the project's future.

- Negative factor: Resources are unchanged from the prior year, indicating no new development.

- Negative factor: Sale agreement for the project expired, creating uncertainty about its future.

Evidence · table

> 1.53

Context: 8,468

### proven

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-29)

Total · gold

#### Identity

- Project: Total
- Commodity: gold
- Ticker: IMG

#### Resource Data

- Category: proven
- Tonnes: 279606000
- Grade: 1.1
- Grade Unit: g/t
- Contained Metal: 9865000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Overall Proven and Probable Mineral Reserves decreased significantly in contained ounces, tonnage, and average grade, primarily due to depletion at key operations.

- Negative factor: Total Proven & Probable Mineral Reserves decreased by 7% in contained ounces compared to the prior year.

- Negative factor: Total Proven & Probable Mineral Reserves decreased by 6% in tonnage compared to the prior year.

- Negative factor: Average grade for total Proven & Probable Mineral Reserves decreased by 2%.

Evidence · table

> 1.10

Context: 279,606

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-30)

Total · gold

#### Identity

- Project: Total
- Commodity: gold
- Ticker: IMG

#### Resource Data

- Category: indicated
- Tonnes: 1030644000
- Grade: 0.94
- Grade Unit: g/t
- Contained Metal: 30987000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Overall Measured and Indicated Mineral Resources showed strong growth in contained ounces and tonnage, driven by successful resource conversion and strategic acquisitions, despite a slight decrease in average grade.

- Positive factor: Total Measured & Indicated Mineral Resources increased significantly by 16% in contained ounces compared to the prior year.

- Positive factor: Total Measured & Indicated Mineral Resources increased by 22% in tonnage compared to the prior year.

- Positive factor: Increase driven by conversion of Inferred resources and new acquisitions, improving overall resource base and confidence.

- Negative factor: Average grade for total Measured & Indicated Mineral Resources decreased by 5%.

Evidence · table

> 0.94

Context: 1,030,644

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/lamgold-reports-mineral-resources-and-reserves-for-the-year-ended-2025--a6b41b3c-28a0-4c17-a73d-d0464f06ef20#fact-resource-facts-31)

Total · gold

#### Identity

- Project: Total
- Commodity: gold
- Ticker: IMG

#### Resource Data

- Category: inferred
- Tonnes: 356628000
- Grade: 1.09
- Grade Unit: g/t
- Contained Metal: 12530000
- Contained Unit: oz

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-02-17T00:00:00.000Z

Reasoning: Overall Inferred Mineral Resources saw a slight decrease in contained ounces and tonnage, likely due to successful conversion to higher confidence categories, although the average grade improved.

- Positive factor: Average grade for total Inferred Mineral Resources increased by 4%.

- Negative factor: Total Inferred Mineral Resources decreased by 2% in contained ounces compared to the prior year.

- Negative factor: Total Inferred Mineral Resources decreased by 6% in tonnage compared to the prior year.

Evidence · table

> 1.09

Context: 356,628

## 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.