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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).

Casa Berardi

Quebec, Canada · 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	3.81 Mt	4.08 g/t	0.50 Moz	31 Dec 2025
Indicated	4.24 Mt	4.99 g/t	0.68 Moz	31 Dec 2025
Inferred	2.50 Mt	6.14 g/t	0.49 Moz	31 Dec 2025
Total Resources	10.55 Mt	4.94 g/t	1.68 Moz	31 Dec 2025
Proved	5.57 Mt	2.57 g/t	0.46 Moz	31 Dec 2025
Probable	7.20 Mt	3.00 g/t	0.70 Moz	31 Dec 2025
Total Reserves	12.77 Mt	2.82 g/t	1.16 Moz	31 Dec 2025

Cut-off grade

0.1000 g/t Au · 0.0300 g/t Au · 0.1100 g/t Au

Price assumption

US$2250.00/oz · US$2100.00/oz

JORC code year

—

Peer benchmark — producing Au projects (282 with resources)Resource size P48Resource grade P88View 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: US$

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	10.55 Mt	4.94 g/t	1.68 Moz	31 Dec 2025	derived from 6 rows Measured: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Measured Resources

Open Pit

Measured

2.62 Mt

2.85 g/t

0.24 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Measured ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Measured Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.03 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 6998.6292 oz vs reported 239000 oz (97.07% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

Open Pit

Indicated

1.02 Mt

2.67 g/t

0.09 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Indicated ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Indicated Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.03 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 2554.8250 oz vs reported 88000 oz (97.10% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

Open Pit

Inferred

0.59 Mt

3.22 g/t

0.06 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Inferred ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Inferred Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.03 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 1773.8583 oz vs reported 61000 oz (97.09% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

Underground

Measured

1.18 Mt

6.82 g/t

0.26 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Measured ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Measured Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.10 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 7580.2417 oz vs reported 260000 oz (97.08% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

Underground

Indicated

3.23 Mt

5.73 g/t

0.60 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Indicated ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Indicated Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.10 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 17315.8125 oz vs reported 595000 oz (97.09% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

Underground

Inferred

1.91 Mt

7.03 g/t

0.43 Moz

31 Dec 2025

Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Inferred ResourcesUnverified

notes (7)

Source: 10-K: 10-K · published 17 Feb 2026

Ref: Summary table: in-situ mineral resources exclusive of mineral reserves as of December 31, 2025 — Inferred Resources

SK-1300 — Reporting code of record: SK-1300
Cutoff 0.10 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 2,250/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).

QA notes:

QA BLOCK: recomputed contained 12610.0625 oz vs reported 432000 oz (97.08% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged).
QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding.
QA sweep: print-verified

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	12.77 Mt	2.82 g/t	1.16 Moz	31 Dec 2025	derived from 4 rows Proved: Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Proved: Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Probable: Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Probable: Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Unverified Evidence record Casa Berardi Total Reserve · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 12771346.7697 Grade 2.8162949069506684 Contained (oz) 1158000 Classification Reserve Source trail 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 · contributes Proved 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 · contributes Proved 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 · contributes Probable 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 · contributes Probable Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.	—
Open Pit	Proved	5.47 Mt	2.54 g/t	0.45 Moz	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Casa Berardi Proved · Au · as at 2025-12-31 Reported figure Area Open Pit Basis 100% Ore tonnes (t) 5471231.1669 Grade 2.5371 Contained (oz) 448000.0000 Classification Reserve Source trail 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Published 2026-02-17 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 13016.9083 oz vs reported 448000 oz (97.09% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged). \| QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding. \| QA sweep fix: incl_of_res cleared — flag belongs on resource rows only; figures print-verified Copies a pre-filled issue record so you can send it through your normal channel.	notes (6) Source:
Open Pit	Probable	6.82 Mt	2.88 g/t	0.63 Moz	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Casa Berardi Probable · Au · as at 2025-12-31 Reported figure Area Open Pit Basis 100% Ore tonnes (t) 6817493.3211 Grade 2.8800 Contained (oz) 631000.0000 Classification Reserve Source trail 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Published 2026-02-17 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 18411.7500 oz vs reported 631000 oz (97.08% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged). \| QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding. \| QA sweep fix: incl_of_res cleared — flag belongs on resource rows only; figures print-verified Copies a pre-filled issue record so you can send it through your normal channel.	notes (6) Source:
Underground	Proved	0.10 Mt	4.59 g/t	0.02 Moz	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Casa Berardi Proved · Au · as at 2025-12-31 Reported figure Area Underground Basis 100% Ore tonnes (t) 101604.6909 Grade 4.5943 Contained (oz) 15000.0000 Classification Reserve Source trail 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Published 2026-02-17 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 437.7333 oz vs reported 15000 oz (97.08% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged). \| QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding. \| QA sweep fix: incl_of_res cleared — flag belongs on resource rows only; figures print-verified Copies a pre-filled issue record so you can send it through your normal channel.	notes (6) Source:
Underground	Probable	0.38 Mt	5.21 g/t	0.06 Moz	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Casa Berardi Probable · Au · as at 2025-12-31 Reported figure Area Underground Basis 100% Ore tonnes (t) 381017.5908 Grade 5.2114 Contained (oz) 64000.0000 Classification Reserve Source trail 10-K: 10-K Summary table: in-situ mineral reserves for all properties as of December 31, 2025 Published 2026-02-17 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 1862.0000 oz vs reported 64000 oz (97.09% disagreement) QA INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged). \| QA FIX (claude-agent-qa): grade printed in oz/ton (Hecla convention) was stored unconverted as g/t. Rescaled x34.2857 (31.1034768/0.90718474); recompute now matches the printed contained within print rounding. \| QA sweep fix: incl_of_res cleared — flag belongs on resource rows only; figures print-verified Copies a pre-filled issue record so you can send it through your normal channel.	notes (6)