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Reporting assumptions

These choices persist and are added to shared URLs.

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).

MCB

Cordillera Administrative Region, Philippines · Developing · 40.0% 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	49.00 Mt	0.19 g/t	0.30 Moz	24 Nov 2025
Indicated	248.00 Mt	0.11 g/t	0.91 Moz	24 Nov 2025
Inferred	45.00 Mt	0.10 g/t	0.14 Moz	24 Nov 2025
Total Resources	212.73 Mt	0.07 g/t	0.46 Moz	24 Nov 2025
Proved	22.07 Mt	0.34 g/t	0.24 Moz	12 Dec 2025
Probable	108.20 Mt	0.19 g/t	0.65 Moz	12 Dec 2025
Total Reserves	130.27 Mt	0.21 g/t	0.89 Moz	12 Dec 2025

Sub-category rows are as disclosed (no Reserves-treatment netting); the Total rows honour the Resources treatment and Inferred-policy toggles, so components may not sum to the Total.

Dotted tonnes/grade are derived under the active Resources treatment: tonnes are netted of (or grossed by) the reserve tonnage alongside contained, and grade is re-derived as netted contained ÷ netted tonnes — not the published figures.

Cu

Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at
Measured	49.00 Mt	0.60%	0.30 Mt Cu	24 Nov 2025
Indicated	248.00 Mt	0.43%	1.07 Mt Cu	24 Nov 2025
Inferred	45.00 Mt	0.49%	0.22 Mt Cu	24 Nov 2025
Total Resources	212.73 Mt	0.35%	0.74 Mt Cu	24 Nov 2025
Proved

Cut-off grade

0.2000 % Cu · 0.2000 g/t Au

Price assumption

—

JORC code year

2012

Peer benchmark — developing Cu projects (124 with resources)Resource size P63Resource grade P58View 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: MCB Definitive Feasibility Study confirms stronger economics · 12 Dec 2025
Reporting code: JORC 2012
Convention: inclusive
Currency assumption: GBP
Disagreement flags: 21 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Measured	49.00 Mt	0.19 g/t	0.30 Moz	0.60%	0.30 Mt Cu	24 Nov 2025	page 6Unverified

Reserves

Area	Category	Tonnes (Mt)	Au		Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Proved	22.07 Mt	0.34 g/t	0.24 Moz	0.90%	0.20 Mt Cu	12 Dec 2025	page 7Unverified Evidence record MCB Proved · Au · as at 2025-12-12 Reported figure Area Whole project Basis 100% Ore tonnes (t) 22074084.0000 Grade 0.3400 Contained (oz) 244136.0000 Classification Reserve Source trail MCB Definitive Feasibility Study confirms stronger economics page 7 Published 2026-01-23 Verification Approved; not independently verified · Model extracted QA INFO: recompute differs 1.16% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±1.47% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: MCB Definitive Feasibility Study confirms stronger economics · published 23 Jan 2026 Ref: page 7 JORC 2012 — Reporting code of record: JORC 2012 QA notes: QA INFO: recompute differs 1.16% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±1.47% (rounding granularity) — treated as reconciled.
Total	Probable	108.20 Mt	0.19 g/t	0.65 Moz	0.61%	0.66 Mt Cu	12 Dec 2025	page 7Unverified Evidence record MCB Probable · Cu · as at 2025-12-12 Reported figure Area Whole project Basis 100% Ore tonnes (t) 108198583.0000 Grade 0.6100 Contained (t Cu) 658929.0000 Classification Reserve Source trail MCB Definitive Feasibility Study confirms stronger economics page 7 Published 2026-01-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	notes (1) Source: MCB Definitive Feasibility Study confirms stronger economics · published 23 Jan 2026 Ref: page 7
Total	Total Reserves	130.27 Mt	0.21 g/t	0.89 Moz	0.66%	0.86 Mt Cu	12 Dec 2025	page 7Unverified Evidence record MCB Total Reserve · Cu · as at 2025-12-12 Reported figure Area Whole project Basis 100% Ore tonnes (t) 130272667.0000 Grade 0.6600 Contained (t Cu) 856492.0000 Classification Reserve Source trail MCB Definitive Feasibility Study confirms stronger economics page 7 Published 2026-01-23 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	notes (1) Source: MCB Definitive Feasibility Study confirms stronger economics · published 23 Jan 2026 page 7