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Reporting assumptions

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Ownership basis

Show the full project inventory before ownership adjustment.

Display scale

Display contained quantities in millions of ounces or tonnes.

Resource treatment

Normalise Resources to exclude Reserves: where a project is flagged inclusive, net Reserves out of Resources so the figure is additional Resources beyond Reserves. Unknown-convention rows are shown as stated.

Resource total

Total Resource includes Inferred (JORC convention). Totals are re-derived from category rows wherever the document discloses them.

Recovery basis

Show the issuer's headline recoverable figure as reported. Lithium-brine reserves already have the brine-processing recovery factor applied; everything else is shown as stated.

Commodity view

Primary view: each commodity in its own contained unit (oz / t).

Donner Lake

Manitoba, Canada · Exploring · 75.0% ownedUnverified

Current R&R by category

Whole-project rollup at the latest vintage per category: printed project-level rows are preferred, and mining areas are summed (tonnes-weighted grade) only where the issuer prints no project-level row. Per-area and per-source detail in the Current R&R table below.

Category	Tonnes (Mt)	Grade (% Li2O)	Contained (Mt LCE)	As at
Measured	—	—	—	—
Indicated	—	—	—	—
Inferred	—	—	—	—
Total Resources	6.80 Mt	1.39% Li2O	0.23 Mt LCE	01 Sept 2023
Proved	—	—	—	—
Probable	—	—	—	—
Total Reserves	—	—	—	—

Cut-off grade

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Price assumption

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JORC code year

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Peer benchmark — exploring Li projects (22 with resources)Resource size P20Resource grade P48View on grade-tonnage chart →

Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.

Data quality

Latest source: Grid Metals Commissions Mineral Resource Estimate for Falcon West; Announces Final Assays from Phase 2 Drill Program · 01 Sept 2023
Reporting code: unknown
Convention: unknown
Currency assumption: US$

Current R&R

Resources

Category	Tonnes (Mt)	Li		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (% Li2O)	Contained (Mt LCE)	As at	Source	Provenance
Total Resources	6.80 Mt	1.39% Li2O	0.23 Mt LCE	01 Sept 2023	About Grid Metals Corp. — property summary list, item 4 (Donner Property)Unverified Evidence record Donner Lake Total Resource · Li · as at 2023-09-01 Reported figure Area Whole project Basis 100% Ore tonnes (t) 6800000.0000 Grade 1.3900 Contained (t LCE) 233747.9600 Classification Resource Source trail Grid Metals Commissions Mineral Resource Estimate for Falcon West; Announces Final Assays from Phase 2 Drill Program About Grid Metals Corp. — property summary list, item 4 (Donner Property) Published 2026-08-06 Verification Approved; not independently verified · Model extracted QA INFO: as_at equals the publication date (2026-08-06) and no printed effective date was found — verify. The document states no 'effective'/'as at'/'as of' date near that date, so the statement date may simply have been borrowed from the dateline (t71 PGLD/NRM class). \| QA fix+approve (t100v, q1.txt): as_at_date=2023-09-01. Print (property summary, item 4): "The Donner Property (Li-Cs) is adjacent to the Mayville Property, and Grid owns 75% of the project. The project contains a NI 43-101 compliant resource of 6.8 million tonnes grading 1.39% Li2O 3." Tonnes, grade and Li conventions are all correct and stand — no other field changes: 6,800,000 t verbatim, grade 1.39 on a Li2O_pct basis verbatim, contained_metal 233,747.96 t LCE (6,800,000 x 1.39% x 2.473, the canonical Li2O-to-LCE factor), and contained_metal_reported correctly NULL because the document prints no contained-metal figure at all in either basis. The 100% reported basis is right: the 6.8 Mt is the project resource, and Grid's 75% is a separate ownership fact, not the reporting basis. THE DATE IS THE DEFECT. as_at was stored as 2026-08-06, the publication dateline, and the guard flagged it ("as_at equals the publication date and no printed effective date was found"); but the document DOES print a date for this estimate, in superscript footnote 3 under "References Cited": "NI 43-101 report by SGS Geological Services dated September 1, 2023 and entitled 'Technical Report on a Mineral Resource Estimate for the Donner Lake Lithium Property, Manitoba, Canada." That footnote marker is attached directly to the "1.39% Li2O 3" cell being stored, so the estimate is the Sep-2023 SGS Donner Lake MRE, roughly three years older than this release. Leaving 2026-08-06 would assert a brand-new Aug-2026 Donner estimate that this document explicitly disclaims — it is a Falcon West drilling release that mentions Donner only in a property list. Note the SGS date is the report date; if the coordinator prefers the report's internal effective date it must come from the SEDAR+ filing, but 2023-09-01 is the only date the print offers and is unambiguously correct against the publication dateline. \| t100v Copies a pre-filled issue record so you can send it through your normal channel.

notes (4)

Source: Grid Metals Commissions Mineral Resource Estimate for Falcon West; Announces Final Assays from Phase 2 Drill Program · published 06 Aug 2026

Ref: About Grid Metals Corp. — property summary list, item 4 (Donner Property)

Unknown code — Reporting code not yet captured for this row.

QA notes:

QA INFO: as_at equals the publication date (2026-08-06) and no printed effective date was found — verify. The document states no 'effective'/'as at'/'as of' date near that date, so the statement date may simply have been borrowed from the dateline (t71 PGLD/NRM class).
QA fix+approve (t100v, q1.txt): as_at_date=2023-09-01. Print (property summary, item 4): "The Donner Property (Li-Cs) is adjacent to the Mayville Property, and Grid owns 75% of the project. The project contains a NI 43-101 compliant resource of 6.8 million tonnes grading 1.39% Li2O 3." Tonnes, grade and Li conventions are all correct and stand — no other field changes: 6,800,000 t verbatim, grade 1.39 on a Li2O_pct basis verbatim, contained_metal 233,747.96 t LCE (6,800,000 x 1.39% x 2.473, the canonical Li2O-to-LCE factor), and contained_metal_reported correctly NULL because the document prints no contained-metal figure at all in either basis. The 100% reported basis is right: the 6.8 Mt is the project resource, and Grid's 75% is a separate ownership fact, not the reporting basis. THE DATE IS THE DEFECT. as_at was stored as 2026-08-06, the publication dateline, and the guard flagged it ("as_at equals the publication date and no printed effective date was found"); but the document DOES print a date for this estimate, in superscript footnote 3 under "References Cited": "NI 43-101 report by SGS Geological Services dated September 1, 2023 and entitled 'Technical Report on a Mineral Resource Estimate for the Donner Lake Lithium Property, Manitoba, Canada." That footnote marker is attached directly to the "1.39% Li2O 3" cell being stored, so the estimate is the Sep-2023 SGS Donner Lake MRE, roughly three years older than this release. Leaving 2026-08-06 would assert a brand-new Aug-2026 Donner estimate that this document explicitly disclaims — it is a Falcon West drilling release that mentions Donner only in a property list. Note the SGS date is the report date; if the coordinator prefers the report's internal effective date it must come from the SEDAR+ filing, but 2023-09-01 is the only date the print offers and is unambiguously correct against the publication dateline.
t100v