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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).

Golden Chest

Idaho, United States · Producing · 100.0% 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 (g/t Au)	Contained (Moz Au)	As at
Measured	0.38 Mt	4.33 g/t	0.05 Moz	31 Dec 2025
Indicated	0.70 Mt	3.96 g/t	0.09 Moz	31 Dec 2025
Inferred	0.58 Mt	2.98 g/t	0.06 Moz	31 Dec 2025
Total Resources	1.67 Mt	3.70 g/t	0.20 Moz	31 Dec 2025
Proved	0.06 Mt	10.18 g/t	0.02 Moz	31 Dec 2025
Probable	0.28 Mt	6.21 g/t	0.06 Moz	31 Dec 2025
Total Reserves	0.34 Mt	6.95 g/t	0.08 Moz	31 Dec 2025

Cut-off grade

2.0000 g/t Au · 4.0000 g/t Au

Price assumption

US$2580.00/oz · US$2040.00/oz

JORC code year

—

Peer benchmark — producing Au projects (282 with resources)Resource size P13Resource grade P82View 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: 10-K: FORM 10-K · 31 Dec 2025
Reporting code: SK-1300
Convention: exclusive
Currency assumption: US$

Current R&R

Resources

Category	Tonnes (Mt)	Au		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Measured	0.38 Mt	4.33 g/t	0.05 Moz	31 Dec 2025	Golden Chest Mine - Mineral Resources table (3-year summary)Unverified Evidence record Golden Chest Measured · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 384351.0000 Grade 4.3300 Contained (oz) 53506.5530 Classification Resource Source trail 10-K: FORM 10-K Golden Chest Mine - Mineral Resources table (3-year summary) Published 2026-03-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.

Reserves

Category	Tonnes (Mt)	Au		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Proved	0.06 Mt	10.18 g/t	0.02 Moz	31 Dec 2025	Golden Chest Mine - Mineral Reserves table (3-year summary)Unverified Evidence record Golden Chest Proved · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 62648.0000 Grade 10.1800 Contained (oz) 20504.3521 Classification Reserve Source trail 10-K: FORM 10-K Golden Chest Mine - Mineral Reserves table (3-year summary) Published 2026-03-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	notes (3) Source: 10-K: FORM 10-K · published 23 Mar 2026 Ref: Golden Chest Mine - Mineral Reserves table (3-year summary) SK-1300 — Reporting code of record: SK-1300 Cutoff 4.00 g/t Au — Cut-off grade assumption from the source statement. @ US$ 2,040/oz — Metal price assumption used to derive this estimate.
Probable	0.28 Mt	6.21 g/t	0.06 Moz	31 Dec 2025	Golden Chest Mine - Mineral Reserves table (3-year summary)Unverified Evidence record Golden Chest Probable · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 275872.0000 Grade 6.2100 Contained (oz) 55079.5376 Classification Reserve Source trail 10-K: FORM 10-K Golden Chest Mine - Mineral Reserves table (3-year summary) Published 2026-03-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	notes (3) Source: 10-K: FORM 10-K · published 23 Mar 2026 Ref: Golden Chest Mine - Mineral Reserves table (3-year summary) SK-1300 — Reporting code of record: SK-1300 Cutoff 4.00 g/t Au
Total Reserves	0.34 Mt	6.95 g/t	0.08 Moz	31 Dec 2025	Golden Chest Mine - Mineral Reserves table (3-year summary)Unverified Evidence record Golden Chest Total Reserve · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 338520.0000 Grade 6.9500 Contained (oz) 75641.5116 Classification Reserve Source trail 10-K: FORM 10-K Golden Chest Mine - Mineral Reserves table (3-year summary) Published 2026-03-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	notes (3) Source: 10-K: FORM 10-K · published 23 Mar 2026 Ref: Golden Chest Mine - Mineral Reserves table (3-year summary) SK-1300 — Reporting code of record: SK-1300