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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).

Island Gold

Ontario, Canada · ProducingUnverified

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	0.33 Mt	11.19 g/t	0.12 Moz	31 Dec 2025
Indicated	1.76 Mt	8.32 g/t	0.47 Moz	31 Dec 2025
Inferred	2.87 Mt	11.51 g/t	1.06 Moz	31 Dec 2025
Total Resources	4.96 Mt	10.35 g/t	1.65 Moz	31 Dec 2025
Proved	1.12 Mt	11.50 g/t	0.42 Moz	31 Dec 2025
Probable	13.95 Mt	10.54 g/t	4.73 Moz	31 Dec 2025
Total Reserves	15.07 Mt	10.61 g/t	5.14 Moz	31 Dec 2025

Cut-off grade

3.7500 g/t Au · 3.7800 g/t Au

Price assumption

US$2000.00/oz · US$1800.00/oz

JORC code year

—

Peer benchmark — producing Au projects (282 with resources)Resource size P47Resource grade P97View 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: Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 · 31 Dec 2025
Reporting code: unknown
Convention: exclusive
Currency assumption: US$

Current R&R

Resources

Category	Tonnes (Mt)	Au		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Measured	0.33 Mt	11.19 g/t	0.12 Moz	31 Dec 2025	Table 3: MEASURED AND INDICATED GOLD MINERAL RESOURCESUnverified Evidence record Island Gold Measured · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 329000.0000 Grade 11.1900 Contained (oz) 118000.0000 Classification Resource Source trail Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 Table 3: MEASURED AND INDICATED GOLD MINERAL RESOURCES Published 2026-02-17 Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.

Reserves

Category	Tonnes (Mt)	Au		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at	Source	Provenance
Proved	1.12 Mt	11.50 g/t	0.42 Moz	31 Dec 2025	Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025Unverified Evidence record Island Gold Proved · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 1123000.0000 Grade 11.5000 Contained (oz) 415000.0000 Classification Reserve Source trail Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025 Published 2026-02-17 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: Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 · published 17 Feb 2026 Ref: Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025 Unknown code — Reporting code not yet captured for this row. Cutoff 3.78 g/t Au — Cut-off grade assumption from the source statement. @ US$ 1,800/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.
Probable	13.95 Mt	10.54 g/t	4.73 Moz	31 Dec 2025	Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025Unverified Evidence record Island Gold Probable · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 13949000.0000 Grade 10.5400 Contained (oz) 4726000.0000 Classification Reserve Source trail Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025 Published 2026-02-17 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: Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 · published 17 Feb 2026 Ref: Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025
Total Reserves	15.07 Mt	10.61 g/t	5.14 Moz	31 Dec 2025	Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025Unverified Evidence record Island Gold Total Reserve · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 15072000.0000 Grade 10.6100 Contained (oz) 5141000.0000 Classification Reserve Source trail Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025 Published 2026-02-17 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: Alamos Gold Reports Mineral Reserves and Resources for the Year-Ended 2025 · published 17 Feb 2026 Ref: Table 1: Total Proven and Probable Mineral Reserves as of December 31, 2025