Stillwater Critical Minerals Files NI 43-101 Technical Report for the Updated Stillwater West Mineral Resource Estimate in Montana, USA

Original announcement by orestocks on

Company
Stillwater Critical Minerals Corp.
Ticker
PGE
Exchange
Unavailable
Region
Montana, USA
Primary commodity
Nickel
Secondary commodities
Copper, Cobalt, Platinum, Palladium, Gold, Rhodium, Chromium
Document categories
Resource update
Extracted
2026-10-19 12:17:41 UTC

Analysis by Minestarters Atlas

Atlas analysis published:

Minestarters Atlas analysis

Summary

Stillwater Critical Minerals has filed an NI 43-101 Technical Report for its Stillwater West project in Montana. The report supports an updated Mineral Resource Estimate that establishes the project's first Indicated Resource and significantly expands the Inferred Resource.

Reasoning: The announcement confirms the filing of a technical report supporting a significant resource upgrade (first Indicated resource) and massive scale, though the actual resource numbers were previously announced in August 2026.

Positive factors

  • Establishment of first Indicated Mineral Resource
  • Significant expansion of Inferred Mineral Resource
  • Large scale of contained critical minerals
  • NI 43-101 Technical Report filed

Facts used in scoring: 3

Classification and evidence

Category Upgradepositive

Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal.

Why it applies: The company established its first Indicated Mineral Resource from previously Inferred resources.

Evidence · text

“established its first Indicated Mineral Resource”

NI 43-101 Compliantpositive

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

Why it applies: The announcement explicitly states the filing of an NI 43-101 Technical Report.

Evidence · text

“filed an independent technical report (the "Technical Report") prepared in accordance with National Instrument 43-101”

QP/CP Signedpositive

Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.

Why it applies: The report names independent Qualified Persons Timothy O. Kuhl and Dr. Ted Eggleston.

Evidence · text

“prepared by Mine Technical Services ("MTS"), including independent Qualified Persons Mr. Timothy O. Kuhl, RM SME, and Dr. Ted Eggleston, P.Geo.”

Extracted facts

Stored fact records: 3. Some facts used in scoring do not have a stored record.

Resource Estimates (3)

indicatedStillwater West · nickelTonnes: 29400000View all details
Link to this fact

Identity

Project
Stillwater West
Commodity
nickel
Region
usa_mt
Reported Region
Montana, USA
Ticker
PGE

Resource scope

Estimate type
resource
Reporting standards
ni_43_101
QP Signed
Yes
Qualified person names
Timothy O. Kuhl, Ted Eggleston
Resource group id
resource:90930581671fe50bdaf5
Ownership percent
100 %

Resource Data

Category
indicated
Tonnes
29400000
Cutoff Grade
0.2
Cutoff Unit
% NiTEq

Prior Estimate

Resource Date
2026-10-16

Metal Equivalent

Metal Eq. Grade
0.38
Metal Eq. Unit
% NiTEq
Assumptions Disclosed
Yes

Review

Needs Review
No
Historical
No

Dates

Event date
2026-10-19T00:00:00.000Z

Reasoning: First Indicated resource for the project.

Positive factors

  • First Indicated resource established

Evidence · text

“First Indicated Mineral Resource: 29.4 million tonnes ("Mt") grading 0.38% total nickel equivalent ("NiTEq") at a 0.20% NiTEq cut-off grade.”

Tags used in scoring

Indicated Resourcepositive

Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: category is "indicated"

Cut-off Disclosedpositive

Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff_grade is stated

QP/CP Signedpositive

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 Compliantpositive

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

Why it applies: reporting_standards includes ni_43_101

No Contained Metalnegative

Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained_metal was not reported

Resource Updateneutral

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

Why it applies: the release compares against a previous estimate

inferredStillwater West · nickelTonnes: 805100000View all details
Link to this fact

Identity

Project
Stillwater West
Commodity
nickel
Region
usa_mt
Reported Region
Montana, USA
Ticker
PGE

Resource scope

Estimate type
resource
Reporting standards
ni_43_101
QP Signed
Yes
Qualified person names
Timothy O. Kuhl, Ted Eggleston
Resource group id
resource:6cb20b85e1e87d58ab3e
Ownership percent
100 %

Resource Data

Category
inferred
Tonnes
805100000
Cutoff Grade
0.2
Cutoff Unit
% NiTEq

Prior Estimate

Resource Date
2026-10-16

Metal Equivalent

Metal Eq. Grade
0.34
Metal Eq. Unit
% NiTEq
Assumptions Disclosed
Yes

Review

Needs Review
No
Historical
No

Dates

Event date
2026-10-19T00:00:00.000Z

Reasoning: Significant expansion of the Inferred resource scale.

Positive factors

  • More than doubled the project's Inferred Mineral Resource

Evidence · text

“Expanded Inferred Mineral Resource: 805.1 Mt grading 0.34% NiTEq at a 0.20% NiTEq cut-off grade.”

Tags used in scoring

Inferred Resourcenegative

Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

Cut-off Disclosedpositive

Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: cutoff_grade is stated

QP/CP Signedpositive

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 Compliantpositive

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

Why it applies: reporting_standards includes ni_43_101

No Contained Metalnegative

Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.

Why it applies: contained_metal was not reported

Resource Updateneutral

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

Why it applies: the release compares against a previous estimate

inferredStillwater West · chromiumContained Metal: 6.6Contained Unit: billion poundsView all details
Link to this fact

Identity

Project
Stillwater West
Commodity
chromium
Region
usa_mt
Reported Region
Montana, USA
Ticker
PGE

Resource scope

Estimate type
resource
Reporting standards
ni_43_101
QP Signed
Yes
Qualified person names
Timothy O. Kuhl, Ted Eggleston
Resource group id
resource:18c3b8a193dd2b939a91
Ownership percent
100 %

Resource Data

Category
inferred
Contained Metal
6.6
Contained Unit
billion pounds

Prior Estimate

Resource Date
2026-10-16

Metal Equivalent

Assumptions Disclosed
Yes

Review

Needs Review
No
Historical
No

Dates

Event date
2026-10-19T00:00:00.000Z

Reasoning: Large chromium resource identified in the Inferred category.

Positive factors

  • Significant additional chromium resource

Evidence · text

“An estimated 6.6 billion pounds of chromium in the Inferred category”

Tags used in scoring

Inferred Resourcenegative

Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: category is "inferred"

Cut-off Undisclosednegative

High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff_grade was stated

QP/CP Signedpositive

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 Compliantpositive

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

Why it applies: reporting_standards includes ni_43_101

Resource Updateneutral

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

Why it applies: the release compares against a previous estimate

How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.