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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).

Wafi-Golpu

Papua New Guinea · Developing · 50.0% ownedUnverified

Same deposit, other owners: NYSE:HMY (50.0%) — each filer reports its own statement of the same orebody; figures can differ by convention and as-at date.

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	389.00 Mt	0.78 g/t	9.80 Moz	31 Dec 2024
Inferred	214.60 Mt	0.70 g/t	5.20 Moz	31 Dec 2024
Total Resources	603.60 Mt	0.75 g/t	15.00 Moz	31 Dec 2024
Proved	—	—	—	—
Probable	389.00 Mt	0.82 g/t	10.20 Moz	31 Dec 2025
Total Reserves	389.00 Mt	0.82 g/t	10.20 Moz	31 Dec 2024

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	107.20 Mt	4.42 g/t	15.20 Moz	31 Dec 2025
Inferred	31.00 Mt	4.50 g/t	4.40 Moz	31 Dec 2025
Total Resources	138.20 Mt	4.44 g/t	19.60 Moz	31 Dec 2025
Proved	—	—	—	—
Probable

Cu

Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at
Measured	—	—	—	—
Indicated	281.60 Mt	0.73%	2.00 Mt Cu	31 Dec 2025
Inferred	183.80 Mt	0.70%	1.20 Mt Cu	31 Dec 2025
Total Resources	465.40 Mt	0.72%	3.20 Mt Cu	31 Dec 2025
Proved	—	—	—	—
Probable

Cut-off grade

—

Price assumption

A$1400.00/t · A$1300.00/t · A$2300.00/t · A$3.00/t · A$1200.00/t · A$1700.00/t

JORC code year

—

Peer benchmark — developing Cu projects (124 with resources)Resource size P79Resource grade P69View 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: 10-K · 31 Dec 2025
Reporting code: SK-1300
Convention: exclusive
Currency assumption: A$
Disagreement flags: 14 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		Ag		Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Indicated	107.20–389.00 Mt	0.78 g/t	9.80 Moz	4.42 g/t

Total

Inferred

31.00–214.60 Mt

0.70 g/t

5.20 Moz

4.50 g/t

4.40 Moz

0.70%

1.20 Mt Cu

31 Dec 2025 *

Silver Resources at December 31, 2025Unverified

notes (5)

Source: 10-K: 10-K · published 19 Feb 2026

Ref: Silver Resources at December 31, 2025

SK-1300 — Reporting code of record: SK-1300
excl — Stated Resources are EXCLUSIVE of Reserves — they sit on top of the reserve, so decks quoting inclusive resources will show a larger figure (inclusive = this row + the converted reserve).
attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project.

QA notes:

QA WARN: identical figures to a stored row of the same company/project/area/category under a DIFFERENT as-at date — likely a re-presentation (DFS / annual statement / global MRE restating an already-stored estimate). Keep one operative copy; verify supersession before storing both. QA INFO: recompute differs 1.93% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±3.71% (rounding granularity) — treated as reconciled.
QA fix: Silver Resources 12/31/2025 "Wafi-Golpu, Papua New Guinea (4)": inferred 15,500 kt @ 4.5 = 2,200 koz — printed figures correct (covers t47 MISSING); basis=/100% wrong (50% JV).

Open Pit

Indicated

107.20 Mt

1.66 g/t

5.80 Moz

—

31 Dec 2025

Gold Resources at December 31, 2025Unverified

notes (5)

Source: 10-K: 10-K · published 19 Feb 2026

Ref: Gold Resources at December 31, 2025

SK-1300 — Reporting code of record: SK-1300
@ A$ 1,400/oz — Metal price assumption used to derive this estimate.
excl — Stated Resources are EXCLUSIVE of Reserves — they sit on top of the reserve, so decks quoting inclusive resources will show a larger figure (inclusive = this row + the converted reserve).
attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project.

QA notes:

QA WARN: identical figures to a stored row of the same company/project/area/category under a DIFFERENT as-at date — likely a re-presentation (DFS / annual statement / global MRE restating an already-stored estimate). Keep one operative copy; verify supersession before storing both. QA INFO: recompute differs 1.36% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±2.12% (rounding granularity) — treated as reconciled.

Open Pit

Inferred

31.00 Mt

1.30 g/t

1.20 Moz

—

31 Dec 2025

Gold Resources at December 31, 2025Unverified

notes (5)

Source: 10-K: 10-K · published 19 Feb 2026

Ref: Gold Resources at December 31, 2025

SK-1300 — Reporting code of record: SK-1300
@ A$ 1,400/oz — Metal price assumption used to derive this estimate.
excl — Stated Resources are EXCLUSIVE of Reserves — they sit on top of the reserve, so decks quoting inclusive resources will show a larger figure (inclusive = this row + the converted reserve).
attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project.

QA notes:

QA WARN: identical figures to a stored row of the same company/project/area/category under a DIFFERENT as-at date — likely a re-presentation (DFS / annual statement / global MRE restating an already-stored estimate). Keep one operative copy; verify supersession before storing both. QA INFO: recompute differs 7.97% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±10.17% (rounding granularity) — treated as reconciled.

Underground

Indicated

281.60 Mt

0.45 g/t

4.00 Moz

—

31 Dec 2025

Gold Resources at December 31, 2025Unverified

notes (5)

Source: 10-K: 10-K · published 19 Feb 2026

Ref: Gold Resources at December 31, 2025

SK-1300 — Reporting code of record: SK-1300
@ A$ 1,300/oz — Metal price assumption used to derive this estimate.
excl — Stated Resources are EXCLUSIVE of Reserves — they sit on top of the reserve, so decks quoting inclusive resources will show a larger figure (inclusive = this row + the converted reserve).
attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project.

QA notes:

QA WARN: identical figures to a stored row of the same company/project/area/category under a DIFFERENT as-at date — likely a re-presentation (DFS / annual statement / global MRE restating an already-stored estimate). Keep one operative copy; verify supersession before storing both. QA INFO: recompute differs 1.85% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±7.15% (rounding granularity) — treated as reconciled.

Underground

Inferred

183.80 Mt

0.60 g/t

3.80 Moz

—

31 Dec 2025

Gold Resources at December 31, 2025Unverified

notes (5)

Source: 10-K: 10-K · published 19 Feb 2026

Ref: Gold Resources at December 31, 2025

SK-1300 — Reporting code of record: SK-1300
@ A$ 1,300/oz — Metal price assumption used to derive this estimate.
excl — Stated Resources are EXCLUSIVE of Reserves — they sit on top of the reserve, so decks quoting inclusive resources will show a larger figure (inclusive = this row + the converted reserve).
attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project.

QA notes:

QA WARN: identical figures to a stored row of the same company/project/area/category under a DIFFERENT as-at date — likely a re-presentation (DFS / annual statement / global MRE restating an already-stored estimate). Keep one operative copy; verify supersession before storing both. QA INFO: recompute differs 6.70% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±8.69% (rounding granularity) — treated as reconciled.

Reserves

Area	Category	Tonnes (Mt)	Au		Ag		Cu		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Cu)	Contained (Mt Cu)	As at	Source	Provenance
Total	Probable	389.00 Mt	0.82 g/t	10.20 Moz	—	—	1.20%	4.60 Mt Cu	31 Dec 2025	Copper Reserves at December 31, 2025Unverified Evidence record Wafi-Golpu Probable · Cu · as at 2025-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 389000000 Grade 1.2000 Contained (t Cu) 4600000 Classification Reserve Source trail 10-K: 10-K Copper Reserves at December 31, 2025 Published 2026-02-19 Verification Approved; not independently verified · Model extracted QA INFO: recompute differs 1.48% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±2.62% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: 10-K: 10-K · published 19 Feb 2026 Ref: Copper Reserves at December 31, 2025 SK-1300 — Reporting code of record: SK-1300 @ A$ 3/t — Metal price assumption used to derive this estimate. attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project. QA notes: QA INFO: recompute differs 1.48% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±2.62% (rounding granularity) — treated as reconciled.
Total	Total Reserves	389.00 Mt	0.82 g/t	10.20 Moz	—	—	1.20%	4.60 Mt Cu	31 Dec 2024	Gold Reserves at December 31, 2024Unverified Evidence record Wafi-Golpu Total Reserve · Au · as at 2024-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 389000000 Grade 0.8200 Contained (oz) 10200000 Classification Reserve Source trail 10-K: 10-K Gold Reserves at December 31, 2024 Published 2025-02-21 Verification Approved; not independently verified · Model extracted tranche12b QA: verified against print/narrative cross-foots Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: 10-K: 10-K