View settings100% · M+I+I · Resources excl. reserves · Native commodities

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).

Zaldívar

Antofagasta Region, Chile · Producing · 50.0% 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 (% Cu)	Contained (Mt Cu)	As at
Measured	459.20 Mt	0.38%	1.74 Mt Cu	31 Dec 2025
Indicated	557.60 Mt	0.35%	1.95 Mt Cu	31 Dec 2025
M&I = Measured + Indicated (overlaps both)	1,016.70 Mt	0.36%	3.66 Mt Cu	31 Dec 2025
Inferred	27.40 Mt	0.33%	0.09 Mt Cu	31 Dec 2025
Total Resources	690.60 Mt	0.34%	2.37 Mt Cu	31 Dec 2025
Proved	230.50 Mt	0.41%	0.95 Mt Cu	31 Dec 2025
Probable	123.10 Mt	0.38%	0.47 Mt Cu	31 Dec 2025
Total Reserves	353.60 Mt	0.40%	1.41 Mt Cu	31 Dec 2025

M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.

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.

Cut-off grade

0.3000 % Cu · 0.1000 % Cu

Price assumption

—

JORC code year

2012

Peer benchmark — producing Cu projects (98 with resources)Resource size P65Resource grade P41View 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: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · 31 Dec 2025
Reporting code: JORC 2012
Convention: inclusive
Currency assumption: GBP

Current R&R

Resources

Area	Category	Tonnes (Mt)	Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Measured	459.20 Mt	0.38%	1.74 Mt Cu	31 Dec 2025	259Unverified Evidence record Zaldívar Measured · Cu · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 459200000.0000 Grade 0.3800 Contained (t Cu) 1744960.0000 Classification Resource Source trail Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) 259 Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA fix: compile ruling: the AR prints Zaldivar R&R at total (100%) basis like every other entity - the 50% appears only in the separate attributable-tonnage column and the KPI footnote; stored figures match the printed total column exactly (e.g. measured 325.1 Mt total vs 162.5 attributable) Copies a pre-filled issue record so you can send it through your normal channel.

Reserves

Area	Category	Tonnes (Mt)	Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Proved	230.50 Mt	0.41%	0.95 Mt Cu	31 Dec 2025	252Unverified Evidence record Zaldívar Proved · Cu · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 230500000.0000 Grade 0.4100 Contained (t Cu) 945050.0000 Classification Reserve Source trail Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) 252 Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA fix: compile ruling: the AR prints Zaldivar R&R at total (100%) basis like every other entity - the 50% appears only in the separate attributable-tonnage column and the KPI footnote; stored figures match the printed total column exactly (e.g. measured 325.1 Mt total vs 162.5 attributable) Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 252 JORC 2012 — Reporting code of record: JORC 2012 QA notes: QA fix: compile ruling: the AR prints Zaldivar R&R at total (100%) basis like every other entity - the 50% appears only in the separate attributable-tonnage column and the KPI footnote; stored figures match the printed total column exactly (e.g. measured 325.1 Mt total vs 162.5 attributable)
Total	Probable	123.10 Mt	0.38%	0.47 Mt Cu	31 Dec 2025	252Unverified Evidence record Zaldívar Probable · Cu · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 123100000.0000 Grade 0.3800 Contained (t Cu) 467780.0000 Classification Reserve Source trail Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) 252 Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA fix: compile ruling: the AR prints Zaldivar R&R at total (100%) basis like every other entity - the 50% appears only in the separate attributable-tonnage column and the KPI footnote; stored figures match the printed total column exactly (e.g. measured 325.1 Mt total vs 162.5 attributable) Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%)
Total	Total Reserves	353.60 Mt	0.40%	1.41 Mt Cu	31 Dec 2025	252Unverified Evidence record Zaldívar Total Reserve · Cu · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 353600000.0000 Grade 0.4000 Contained (t Cu) 1414400.0000 Classification Reserve Source trail Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) 252 Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA fix: compile ruling: the AR prints Zaldivar R&R at total (100%) basis like every other entity - the 50% appears only in the separate attributable-tonnage column and the KPI footnote; stored figures match the printed total column exactly (e.g. measured 325.1 Mt total vs 162.5 attributable) Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%)