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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

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Diamba Sud

Kédougou Region, Senegal · Developing · 90.0% 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	—	—	—	—
Indicated	3.36 Mt	1.12 g/t	0.12 Moz	10 Apr 2026
Inferred	1.63 Mt	1.30 g/t	0.07 Moz	10 Apr 2026
Total Resources	5.00 Mt	1.18 g/t	0.19 Moz	10 Apr 2026
Proved	—	—	—	—
Probable	20.50 Mt	1.75 g/t	1.15 Moz	10 Apr 2026
Total Reserves	20.50 Mt	1.75 g/t	1.15 Moz	10 Apr 2026

Cut-off grade

0.2600 g/t Au · 0.3800 g/t Au · 0.3700 g/t Au · 0.3600 g/t Au · 0.3500 g/t Au

Price assumption

US$3300.00/oz · US$2900.00/oz

JORC code year

—

Peer benchmark — developing Au projects (284 with resources)Resource size P22Resource grade P57View 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: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · 10 Apr 2026
Reporting code: unknown
Convention: exclusive
Currency assumption: US$
Disagreement flags: 14 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	Indicated	3.36 Mt	1.12 g/t	0.12 Moz	10 Apr 2026	Table 3: Mineral Resource Estimate, exclusive of Mineral Reserves — Indicated TotalUnverified Evidence record Diamba Sud Indicated · Au · as at 2026-04-10 Reported figure Area Whole project Basis 100% Ore tonnes (t) 3364000.0000 Grade 1.1200 Contained (oz) 121000.0000 Classification Resource Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 3: Mineral Resource Estimate, exclusive of Mineral Reserves — Indicated Total Published 2026-06-29 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.

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	20.50 Mt	1.75 g/t	1.15 Moz	10 Apr 2026	Table 2: Mineral Reserve Estimate — TotalUnverified Evidence record Diamba Sud Total Reserve · Au · as at 2026-04-10 Reported figure Area Whole project Basis 100% Ore tonnes (t) 20500000.0000 Grade 1.7500 Contained (oz) 1151000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate — Total Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Ref: Table 2: Mineral Reserve Estimate — Total Unknown code — Reporting code not yet captured for this row. Cutoff 0.35 g/t Au — Cut-off grade assumption from the source statement. @ US$ 2,900/oz — Metal price assumption used to derive this estimate. QA notes: QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none.
Area A	Probable	4.14 Mt	1.59 g/t	0.21 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Area A Basis 100% Ore tonnes (t) 4136000.0000 Grade 1.5900 Contained (oz) 211000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Ref: Table 2: Mineral Reserve Estimate
Area D	Probable	5.10 Mt	1.70 g/t	0.28 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Area D Basis 100% Ore tonnes (t) 5103000.0000 Grade 1.7000 Contained (oz) 279000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Ref: Table 2: Mineral Reserve Estimate
Karakara	Probable	2.86 Mt	1.87 g/t	0.17 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Karakara Basis 100% Ore tonnes (t) 2859000.0000 Grade 1.8700 Contained (oz) 172000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Ref: Table 2: Mineral Reserve Estimate
Kassasoko	Probable	1.16 Mt	0.96 g/t	0.04 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Kassasoko Basis 100% Ore tonnes (t) 1164000.0000 Grade 0.9600 Contained (oz) 36000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Ref: Table 2: Mineral Reserve Estimate
Moungoundi	Probable	1.07 Mt	1.10 g/t	0.04 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Moungoundi Basis 100% Ore tonnes (t) 1069000.0000 Grade 1.1000 Contained (oz) 38000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Table 2: Mineral Reserve Estimate
Southern Arc	Probable	4.46 Mt	2.31 g/t	0.33 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Southern Arc Basis 100% Ore tonnes (t) 4464000.0000 Grade 2.3100 Contained (oz) 332000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Table 2: Mineral Reserve Estimate
Western Splay	Probable	1.71 Mt	1.51 g/t	0.08 Moz	10 Apr 2026	Table 2: Mineral Reserve EstimateUnverified Evidence record Diamba Sud Probable · Au · as at 2026-04-10 Reported figure Area Western Splay Basis 100% Ore tonnes (t) 1706000.0000 Grade 1.5100 Contained (oz) 83000.0000 Classification Reserve Source trail Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz Table 2: Mineral Reserve Estimate Published 2026-06-29 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (4) Source: Fortuna delivers robust Feasibility Study for the Diamba Sud Gold Project in Senegal: After-tax IRR of 60% and NPV5% of US$1 billion using US$3,500/oz · published 29 June 2026 Table 2: Mineral Reserve Estimate