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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).

Thunderbox

Western Australia, Australia · Producing · 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.

Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at
Measured	15.08 Mt	1.54 g/t	0.72 Moz	31 Mar 2026
Indicated	49.91 Mt	1.75 g/t	2.80 Moz	31 Mar 2026
Inferred	16.13 Mt	1.50 g/t	0.78 Moz	31 Mar 2026
Total Resources	51.42 Mt	1.64 g/t	2.72 Moz	31 Mar 2026
Proved	10.19 Mt	1.29 g/t	0.43 Moz	31 Mar 2026
Probable	19.51 Mt	1.84 g/t	1.15 Moz	31 Mar 2026
Total Reserves	29.70 Mt	1.65 g/t	1.57 Moz	31 Mar 2026

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 g/t Au · 0.8000 g/t Au

Price assumption

—

JORC code year

2012

Peer benchmark — producing Au projects (282 with resources)Resource size P58Resource grade P54View 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: Resources and Reserves Update · 31 Mar 2026
Reporting code: JORC 2012
Convention: inclusive
Currency assumption: A$
Disagreement flags: 7 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Total	Total Resources	51.42 Mt	1.64 g/t	2.72 Moz	31 Mar 2026	derived from 7 rows

Stockpiles

Measured

3.39 Mt

1.20 g/t

0.09 Moz

31 Mar 2026

6Unverified

notes (5)

Source: Resources and Reserves Update · published 02 June 2026

Ref: 6

JORC 2012 — Reporting code of record: JORC 2012
inc — Stated Resources are inclusive of Reserves. Set Resources: Excl. Reserves to net them out.

QA notes:

QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. QA BLOCK: recomputed contained 130673.4944 oz vs reported 88000 oz (48.49% disagreement)
QA annotate (t98v, a5.txt): Same class at Thunderbox, and here the print contradicts itself inside a single row: "Stockpiles 3,387 1.2 88 - - - - - - 3,387 1.4 88" — identical tonnes and ounces are given TWO grades (1.2 measured, 1.4 total) in the same line, and the Ore Reserves table prints a third for the same figures: "Stockpiles 3,387 0.8 88". 88koz over 3,387kt implies 0.8081 g/t, matching only the reserve print. The resource table's stockpile grade column is unreliable; tonnes and ounces are stable across all three prints. Operator FIX candidate: grade=0.8.
t98v

Reserves

Area	Category	Tonnes (Mt)	Au		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Total	Total Reserves	29.70 Mt	1.65 g/t	1.57 Moz	31 Mar 2026	derived from 5 rows Proved: 7 Proved: 7 Proved: 7 Probable: 7 Probable: 7 Unverified Evidence record Thunderbox Total Reserve · Au · as at 2026-03-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 29703000 Grade 1.6525266808066525 Contained (oz) 1574000 Classification Reserve Source trail Resources and Reserves Update 7 · contributes Proved Resources and Reserves Update 7 · contributes Proved Resources and Reserves Update 7 · contributes Proved Resources and Reserves Update 7 · contributes Probable Resources and Reserves Update 7 · contributes Probable Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	—
Stockpiles	Proved	3.39 Mt	0.80 g/t	0.09 Moz	31 Mar 2026	7Unverified Evidence record Thunderbox Proved · Au · as at 2026-03-31 Reported figure Area Stockpiles Basis 100% Ore tonnes (t) 3387000.0000 Grade 0.8000 Contained (oz) 88000.0000 Classification Reserve Source trail Resources and Reserves Update 7 Published 2026-06-02 Verification Approved; not independently verified · Model extracted QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. QA INFO: recompute differs 1.00% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±6.58% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Resources and Reserves Update · published 02 June 2026 Ref: 7
Surface	Proved	1.44 Mt	1.30 g/t	0.06 Moz	31 Mar 2026	7Unverified Evidence record Thunderbox Proved · Au · as at 2026-03-31 Reported figure Area Surface Basis 100% Ore tonnes (t) 1435000.0000 Grade 1.3000 Contained (oz) 59000.0000 Classification Reserve Source trail Resources and Reserves Update 7 Published 2026-06-02 Verification Approved; not independently verified · Model extracted QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. QA INFO: recompute differs 1.66% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±4.73% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Resources and Reserves Update · published 02 June 2026 Ref: 7
Surface	Probable	13.47 Mt	1.50 g/t	0.65 Moz	31 Mar 2026	7Unverified Evidence record Thunderbox Probable · Au · as at 2026-03-31 Reported figure Area Surface Basis 100% Ore tonnes (t) 13467000.0000 Grade 1.5000 Contained (oz) 646000.0000 Classification Reserve Source trail Resources and Reserves Update 7 Published 2026-06-02 Verification Approved; not independently verified · Model extracted QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Resources and Reserves Update · published 02 June 2026 Ref: 7 JORC 2012 — Reporting code of record: JORC 2012
Underground	Proved	5.37 Mt	1.60 g/t	0.28 Moz	31 Mar 2026	7Unverified Evidence record Thunderbox Proved · Au · as at 2026-03-31 Reported figure Area Underground Basis 100% Ore tonnes (t) 5367000.0000 Grade 1.6000 Contained (oz) 280000.0000 Classification Reserve Source trail Resources and Reserves Update 7 Published 2026-06-02 Verification Approved; not independently verified · Model extracted QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. QA INFO: recompute differs 1.40% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±4.92% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Resources and Reserves Update · published 02 June 2026 Ref: 7
Underground	Probable	6.05 Mt	2.60 g/t	0.50 Moz	31 Mar 2026	7Unverified Evidence record Thunderbox Probable · Au · as at 2026-03-31 Reported figure Area Underground Basis 100% Ore tonnes (t) 6047000.0000 Grade 2.6000 Contained (oz) 501000.0000 Classification Reserve Source trail Resources and Reserves Update 7 Published 2026-06-02 Verification Approved; not independently verified · Model extracted QA WARN: unrecognised source metal label 'Ounces' for Au — verify the commodity mapping. Copies a pre-filled issue record so you can send it through your normal channel.	notes (2) Source: Resources and Reserves Update · published 02 June 2026 Ref: 7 JORC 2012 — Reporting code of record: JORC 2012