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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).

Sherridon

Manitoba, Canada · Exploring · 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	10.03 Mt	0.30 g/t	0.10 Moz	22 Apr 2026
Inferred	26.74 Mt	0.25 g/t	0.22 Moz	22 Apr 2026
Total Resources	36.77 Mt	0.26 g/t	0.32 Moz	22 Apr 2026
Proved	—	—	—	—
Probable	—	—	—	—
Total Reserves	—	—	—	—

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	10.03 Mt	4.73 g/t	1.53 Moz	22 Apr 2026
Inferred	27.76 Mt	7.19 g/t	6.42 Moz	22 Apr 2026
Total Resources	37.79 Mt	6.54 g/t	7.94 Moz	22 Apr 2026
Proved	—	—	—	—
Probable

Cu

Category	Tonnes (Mt)	Grade (% Cu)	Contained (Mt Cu)	As at
Measured	—	—	—	—
Indicated	10.03 Mt	0.39%	0.04 Mt Cu	22 Apr 2026
Inferred	18.17 Mt	1.08%	0.20 Mt Cu	22 Apr 2026
Total Resources	28.20 Mt	0.83%	0.23 Mt Cu	22 Apr 2026
Proved	—	—	—	—
Probable

Zn

Category	Tonnes (Mt)	Grade (% Zn)	Contained (Mt Zn)	As at
Measured	—	—	—	—
Indicated	10.03 Mt	0.83%	0.08 Mt Zn	22 Apr 2026
Inferred	18.17 Mt	1.00%	0.18 Mt Zn	22 Apr 2026
Total Resources	28.20 Mt	0.94%	0.26 Mt Zn	22 Apr 2026
Proved	—	—	—	—
Probable

Cut-off grade

20.0000 g/t Au · 20.0000 g/t Ag · 55.0000 % Cu · 55.0000 g/t Au · 55.0000 g/t Ag · 20.0000 % Cu · 20.0000 % Zn · 55.0000 % Zn

Price assumption

US$5.00/t

JORC code year

—

Peer benchmark — exploring Cu projects (113 with resources)Resource size P47Resource grade P76View 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: T2 Metals Files NI 43-101 Mineral Resource Estimate Report for the Sherridon Copper-Zinc-Gold-Silver Project, Manitoba, Canada · 22 Apr 2026
Reporting code: unknown
Convention: unknown
Currency assumption: US$
Disagreement flags: 3 rows

Current R&R

Resources

Area	Category	Tonnes (Mt)	Au		Ag		Cu		Zn		As at	Source	Provenance
Area	Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	Grade (% Cu)	Contained (Mt Cu)	Grade (% Zn)	Contained (Mt Zn)	As at	Source	Provenance
Total	Total Resources	28.20–37.79 Mt

Underground

Inferred

8.57 Mt

0.20 g/t

0.06 Moz

—

22 Apr 2026

Table 1b: Sherridon Project Mineral Resource Estimate (Inferred) — Total Inferred UG rowUnverified

notes (16)

Source: T2 Metals Announces NI 43-101 Mineral Resource Estimate at the Sherridon Copper-Zinc-Gold-Silver Project, Manitoba, Canada · published 07 May 2026

Ref: Table 1b: Sherridon Project Mineral Resource Estimate (Inferred) — Total Inferred UG row

Unknown code — Reporting code not yet captured for this row.
Cutoff 55.00 g/t Au — Cut-off grade assumption from the source statement.
@ US$ 5/oz — Metal price assumption used to derive this estimate.

QA notes:

QA approved: verified against the source print by the tranche-23 agent pass
t83 print-round FIX (p5): DISCREPANCY RESOLVED IN FAVOUR OF THE LEAVES - the stored 55,106oz is a recompute off a grade the release prints to one decimal only: 'Total Inferred
UG
55
133.6
8.57
1.1
1.0
0.2
6.3
200.20
192.81
1.7' (Table 1b). Two printed figures in the same release refute that recompute: bullet 2, 'Total Inferred Mineral Resource of 18.15 million tonnes grading 1.08% Cu, 1.00% Zn, 0.27 g/t Au and 7.05 g/t Ag', and bullet 3, 'Project contains 86 million lb of copper and 96,000 oz of gold in the Indicated category and 430 million lb of copper and 158,000 oz gold in the Inferred category'. Leaf pair Bob UG 4.19Mt @0.3 + Jungle UG 4.38Mt @0.16 = 1,957,800 g = 62,945oz (true weighted grade 0.2284 g/t, which rounds to the printed 0.2); OP leaves = 2,943,600 g = 94,639oz; 94,639 + 62,945 = 157,584oz -> the printed 158,000oz, and (2.9436+1.9578)/18.15 = 0.270 g/t -> the printed 0.27. The rounded-rollup pair (92,498 + 55,106) gives 147,604oz -> 148koz and 0.253 g/t -> 0.25, contradicting both printed figures; no other combination reaches 158koz. grade stays at the printed 0.20 (1 dp) and tonnes at the printed 8,570,000, so contained is deliberately not tonnes x grade on this row - same convention as a printed contained beating a recompute. Cross-check that the scopes are identical: the same UG group matches the leaves EXACTLY on Cu (90,809.1925 t) and Zn (87,457.1449 t).