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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).

Guanajuato Sur

Manual entry

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	0.71 Mt	4.18 g/t	0.10 Moz	31 Dec 2025
Inferred	18.26 Mt	2.43 g/t	1.43 Moz	31 Dec 2025
Total Resources	18.98 Mt	2.50 g/t	1.52 Moz	31 Dec 2025
Proved	—	—	—	—
Probable	—	—	—	—
Total Reserves	—	—	—	—

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	0.71 Mt	631.00 g/t	14.49 Moz	31 Dec 2025
Inferred	18.26 Mt	503.00 g/t	295.02 Moz	31 Dec 2025
Total Resources	18.98 Mt	507.82 g/t	309.51 Moz	31 Dec 2025
Proved	—	—	—	—
Probable

Cut-off grade

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Price assumption

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JORC code year

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Peer benchmark — Ag projects (all stages) (408 with resources)Resource size P95Resource 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: Fresnillo plc - Annual Report and Accounts 2025, incl. Mineral Resources and Ore Reserves tables as at 31 Dec 2025 · 31 Dec 2025
Reporting code: unknown
Convention: unknown
Currency assumption: GBP

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	0.71 Mt	4.18 g/t	0.10 Moz	631.00 g/t	14.49 Moz	31 Dec 2025	p.287 - Consolidated audited mineral resource statement of exploration projects and prospectsManual entry Evidence record Guanajuato Sur Indicated · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 714000.0000 Grade 4.1800 Contained (oz) 96000.0000 Classification Resource Source trail Fresnillo plc - Annual Report and Accounts 2025, incl. Mineral Resources and Ore Reserves tables as at 31 Dec 2025 p.287 - Consolidated audited mineral resource statement of exploration projects and prospects Published 2026-04-17 Verification Approved; not independently verified · Manual entry t87f spec capture, print-verified — Exploration projects and prospects mineral resource statement, p.287 - Consolidated audited mineral resource statement of exploration projects and prospects; printed 714 kt @ 4.18 = 96 koz \| quote: Guanajuato Sur – veins US$85.50/t 714 4.18 631 — — 96 14,490 — — Copies a pre-filled issue record so you can send it through your normal channel.