View settings100% · M+I+I · Resources excl. reserves · Native commodities

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).

Greens Creek

Alaska, United States · 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.

Au

Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at
Measured	—	—	—	—
Indicated	5.30 Mt	3.84 g/t	0.65 Moz	31 Dec 2025
Inferred	1.30 Mt	3.67 g/t	0.15 Moz	31 Dec 2025
Total Resources	6.60 Mt	3.81 g/t	0.81 Moz	31 Dec 2025
Proved	0.01 Mt	4.11 g/t	1 koz	31 Dec 2025
Probable	9.22 Mt	2.85 g/t	0.84 Moz	31 Dec 2025
Total Reserves	9.23 Mt	2.85 g/t	0.84 Moz	31 Dec 2025

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	5.30 Mt	521.14 g/t	88.66 Moz	31 Dec 2025
Inferred	1.30 Mt	558.86 g/t	23.31 Moz	31 Dec 2025
Total Resources	6.60 Mt	528.56 g/t	111.97 Moz	31 Dec 2025
Proved	0.01 Mt	819.43 g/t	0.31 Moz	31 Dec 2025
Probable

Zn

Category	Tonnes (Mt)	Grade (% Zn)	Contained (Mt Zn)	As at
Measured	—	—	—	—
Indicated	5.30 Mt	8.90%	0.47 Mt Zn	31 Dec 2025
Inferred	1.30 Mt	8.00%	0.10 Mt Zn	31 Dec 2025
Total Resources	6.60 Mt	8.72%	0.58 Mt Zn	31 Dec 2025
Proved	0.01 Mt	7.80%	0.91 kt Zn	31 Dec 2025
Probable

Pb

Category	Tonnes (Mt)	Grade (% Pb)	Contained (Mt Pb)	As at
Measured	—	—	—	—
Indicated	5.30 Mt	3.40%	0.18 Mt Pb	31 Dec 2025
Inferred	1.30 Mt	3.20%	0.04 Mt Pb	31 Dec 2025
Total Resources	6.60 Mt	3.36%	0.22 Mt Pb	31 Dec 2025
Proved	0.01 Mt	3.00%	0.35 kt Pb	31 Dec 2025
Probable

Cut-off grade

275.0000 % Pb · 275.0000 g/t Au · 275.0000 g/t Ag · 275.0000 % Zn

Price assumption

US$26.00/oz · US$25.00/oz

JORC code year

—

Peer benchmark — producing Ag projects (118 with resources)Resource size P80Resource grade P100View 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$
Disagreement flags: 3 rows

Current R&R

Resources

Category	Tonnes (Mt)	Au		Ag		Zn		Pb		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Zn)	Contained (Mt Zn)	Grade (% Pb)	Contained (Mt Pb)	As at	Source	Provenance
Indicated	5.30 Mt	3.84 g/t	0.65 Moz	521.14 g/t	88.66 Moz	8.90%

Inferred

1.30 Mt

3.67 g/t

0.15 Moz

558.86 g/t

23.31 Moz

8.00%

0.10 Mt Zn

3.20%

0.04 Mt Pb

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 275.00 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 26/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 4465.9125 oz vs reported 153000 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

Category	Tonnes (Mt)	Au		Ag		Zn		Pb		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Zn)	Contained (Mt Zn)	Grade (% Pb)	Contained (Mt Pb)	As at	Source	Provenance
Proved	0.01 Mt	4.11 g/t	1 koz	819.43 g/t	0.31 Moz	7.80%	0.91 kt Zn	3.00%	0.35 kt Pb	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Greens Creek Proved · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 11793.4016 Grade 4.1143 Contained (oz) 1000.0000 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 45.5000 oz vs reported 1000 oz (95.45% 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: 10-K: 10-K · published 17 Feb 2026 Ref: Summary table: in-situ mineral reserves for all properties as of December 31, 2025 SK-1300 — Reporting code of record: SK-1300 Cutoff 275.00 g/t Au — Cut-off grade assumption from the source statement. @ US$ 25/oz — Metal price assumption used to derive this estimate. QA notes: QA BLOCK: recomputed contained 45.5000 oz vs reported 1000 oz (95.45% 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
Probable	9.22 Mt	2.85 g/t	0.84 Moz	356.57 g/t	105.79 Moz	6.30%	0.58 Mt Zn	2.30%	0.22 Mt Pb	31 Dec 2025	Summary table: in-situ mineral reserves for all properties as of December 31, 2025Unverified Evidence record Greens Creek Probable · Zn · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 9222440.0668 Grade 6.3000 Contained (t Zn) 577994.6134 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 INFO: short-ton document — printed tonnage/contained were US short tons; converted x0.90718474 to metric tonnes deterministically at parse (grade unchanged). \| 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 (5)
Total Reserves	9.23 Mt	2.85 g/t	0.84 Moz	357.16 g/t	106.10 Moz	6.30%	0.58 Mt Zn	2.30%	0.22 Mt Pb	31 Dec 2025	derived from 2 rows 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 Unverified Evidence record Greens Creek Total Reserve · Au · as at 2025-12-31 Reported figure Area Whole project Basis 100% Ore tonnes (t) 9234233.4684 Grade 2.847320178796752 Contained (oz) 842000 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 Probable Verification Approved; not independently verified · Model extracted Copies a pre-filled issue record so you can send it through your normal channel.