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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).

Era Dorada

Jutiapa, Guatemala · Developing · 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.

Au

Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at
Measured	—	—	—	—
Indicated	2.46 Mt	6.36 g/t	0.50 Moz	30 Nov 2025
Inferred	0.74 Mt	5.94 g/t	0.14 Moz	30 Nov 2025
Total Resources	3.20 Mt	6.26 g/t	0.64 Moz	30 Nov 2025
Proved	0.03 Mt	5.35 g/t	0.01 Moz	05 Dec 2025
Probable	8.72 Mt	6.01 g/t	1.68 Moz	05 Dec 2025
Total Reserves	8.75 Mt	6.01 g/t	1.69 Moz	05 Dec 2025

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	2.46 Mt	22.76 g/t	1.80 Moz	30 Nov 2025
Inferred	0.74 Mt	19.22 g/t	0.46 Moz	30 Nov 2025
Total Resources	3.20 Mt	21.94 g/t	2.26 Moz	30 Nov 2025
Proved	0.03 Mt	22.59 g/t	0.02 Moz	05 Dec 2025
Probable

Cut-off grade

2.2500 g/t Ag · 2.2500 g/t Au · 2.8200 g/t Au · 2.8200 g/t Ag

Price assumption

US$2500.00/oz · US$2000.00/oz

JORC code year

—

Peer benchmark — developing Au projects (284 with resources)Resource size P42Resource grade P98View 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: 20-F/A: FORM 20-F/A · 05 Dec 2025
Reporting code: SK-1300
Convention: exclusive
Currency assumption: US$
Disagreement flags: 1 row

Current R&R

Resources

Category	Tonnes (Mt)	Au		Ag		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	As at	Source	Provenance
Indicated	2.46 Mt	6.36 g/t	0.50 Moz	22.76 g/t	1.80 Moz	30 Nov 2025	Measured and Indicated Exclusive Mineral Resource Estimates (as of December 31, 2025) — Silver table / Mineral Resources Era Dorada ProjectUnverified Evidence record Era Dorada Indicated · Ag · as at 2025-11-30 Reported figure Area Whole project Basis 100% Ore tonnes (t) 2460000.0000 Grade 22.7600 Contained (oz) 1801000.0000 Classification Resource Source trail 20-F/A: FORM 20-F/A Measured and Indicated Exclusive Mineral Resource Estimates (as of December 31, 2025) — Silver table / Mineral Resources Era Dorada Project Published 2026-04-29 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		Ag		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	As at	Source	Provenance
Proved	0.03 Mt	5.35 g/t	0.01 Moz	22.59 g/t	0.02 Moz	05 Dec 2025	Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada ProjectUnverified Evidence record Era Dorada Proved · Au · as at 2025-12-05 Reported figure Area Whole project Basis 100% Ore tonnes (t) 30000.0000 Grade 5.3500 Contained (oz) 5000.0000 Classification Reserve Source trail 20-F/A: FORM 20-F/A Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project Published 2026-04-29 Verification Approved; not independently verified · Model extracted QA INFO: recompute differs 3.20% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±12.09% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (3) Source: 20-F/A: FORM 20-F/A · published 29 Apr 2026 Ref: Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project SK-1300 — Reporting code of record: SK-1300 @ US$ 2,000/oz — Metal price assumption used to derive this estimate. QA notes: QA INFO: recompute differs 3.20% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±12.09% (rounding granularity) — treated as reconciled.
Probable	8.72 Mt	6.01 g/t	1.68 Moz	20.39 g/t	5.72 Moz	05 Dec 2025	Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada ProjectUnverified Evidence record Era Dorada Probable · Au · as at 2025-12-05 Reported figure Area Whole project Basis 100% Ore tonnes (t) 8717000.0000 Grade 6.0100 Contained (oz) 1684000.0000 Classification Reserve Source trail 20-F/A: FORM 20-F/A Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project Published 2026-04-29 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: 20-F/A: FORM 20-F/A · published 29 Apr 2026 Ref: Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project
Total Reserves	8.75 Mt	6.01 g/t	1.69 Moz	20.40 g/t	5.74 Moz	05 Dec 2025	derived from 2 rows Proved: Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project Probable: Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project Unverified Evidence record Era Dorada Total Reserve · Au · as at 2025-12-05 Reported figure Area Whole project Basis 100% Ore tonnes (t) 8747000 Grade 6.007736366754315 Contained (oz) 1689000 Classification Reserve Source trail 20-F/A: FORM 20-F/A Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project · contributes Proved 20-F/A: FORM 20-F/A Proven & Probable Mineral Reserve Estimates (as of December 31, 2025) — Gold table / Mineral Reserve Era Dorada Project · contributes Probable Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.