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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).

Angel Island

Nevada, United States · Developing · 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 (ppm Li)	Contained (Mt LCE)	As at
Measured	858.26 Mt	990 ppm Li	4.52 Mt LCE	29 Apr 2024
Indicated	280.33 Mt	891 ppm Li	1.33 Mt LCE	29 Apr 2024
Inferred	187.28 Mt	820 ppm Li	0.82 Mt LCE	29 Apr 2024
Total Resources	1,038.22 Mt	888 ppm Li	4.91 Mt LCE	29 Apr 2024
Proved	266.39 Mt	1,147 ppm Li	1.63 Mt LCE	29 Apr 2024
Probable	21.26 Mt	1,174 ppm Li	0.13 Mt LCE	29 Apr 2024
Total Reserves	287.65 Mt	1,149 ppm Li	1.76 Mt LCE	03 Jan 2026

Sub-category rows are as disclosed (no Reserves-treatment netting); the Total rows honour the Resources treatment and Inferred-policy toggles, so components may not sum to the Total.

Dotted tonnes/grade are derived under the active Resources treatment: tonnes are netted of (or grossed by) the reserve tonnage alongside contained, and grade is re-derived as netted contained ÷ netted tonnes — not the published figures.

Cut-off grade

200 ppm Li · 900 ppm Li

Price assumption

US$24000.00/t

JORC code year

—

Peer benchmark — developing Li projects (28 with resources)Resource size P80Resource grade P95View 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: CENTURY LITHIUM FILES TECHNICAL REPORT ON THE FEASIBILITY STUDY FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA · 03 Jan 2026
Reporting code: unknown
Convention: inclusive
Currency assumption: US$
Disagreement flags: 1 row

Current R&R

Resources

Category	Tonnes (Mt)	Li		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (ppm Li)	Contained (Mt LCE)	As at	Source	Provenance
Measured	858.26 Mt	990 ppm Li	4.52 Mt LCE	29 Apr 2024	Mineral Resource Estimate tableUnverified Evidence record Angel Island Measured · Li · as at 2024-04-29 Reported figure Area Whole project Basis 100% Ore tonnes (t) 858260000.0000 Grade 990.0000 Contained (t LCE) 4523000.0000 Classification Resource Source trail CENTURY LITHIUM REPORTS UPDATED FEASIBILITY STUDY WITH AFTER-TAX NPV OF $4.01 BILLION AND OPERATING COSTS OF $4,389 PER TONNE OF LITHIUM CARBONATE FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA Mineral Resource Estimate table Published 2026-02-23 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 849677.4000 t Li vs reported 4523000.000 t Li (81.21% disagreement) \| QA fix: contained=4523000, reported=850000 \| BLOCK agreed — double-converted LCE (VMS t23 class): stored = printed LCE 4.523Mt x5.32; Li_ppm native reported = printed 0.850Mt Li; incl=true per note 6, as_at 2024-04-29 per print Copies a pre-filled issue record so you can send it through your normal channel.

Reserves

Category	Tonnes (Mt)	Li		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (ppm Li)	Contained (Mt LCE)	As at	Source	Provenance
Proved	266.39 Mt	1,147 ppm Li	1.63 Mt LCE	29 Apr 2024	Mineral Reserve Estimate tableUnverified Evidence record Angel Island Proved · Li · as at 2024-04-29 Reported figure Area Whole project Basis 100% Ore tonnes (t) 266390000.0000 Grade 1147.0000 Contained (t LCE) 1626000.0000 Classification Reserve Source trail CENTURY LITHIUM REPORTS UPDATED FEASIBILITY STUDY WITH AFTER-TAX NPV OF $4.01 BILLION AND OPERATING COSTS OF $4,389 PER TONNE OF LITHIUM CARBONATE FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA Mineral Reserve Estimate table Published 2026-02-23 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 305549.3300 t Li vs reported 1626000.000 t Li (81.21% disagreement) \| QA fix: contained=1626000, reported=306000 \| BLOCK agreed — double-converted LCE; printed LCE 1.626Mt, printed native 0.306Mt Li Copies a pre-filled issue record so you can send it through your normal channel.	notes (6) Source: CENTURY LITHIUM REPORTS UPDATED FEASIBILITY STUDY WITH AFTER-TAX NPV OF $4.01 BILLION AND OPERATING COSTS OF $4,389 PER TONNE OF LITHIUM CARBONATE FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA · published 23 Feb 2026 Ref: Mineral Reserve Estimate table Unknown code — Reporting code not yet captured for this row. Cutoff 900 ppm Li — Cut-off grade assumption from the source statement. @ US$ 24,000/t LCE — Metal price assumption used to derive this estimate. QA notes: QA BLOCK: recomputed contained 305549.3300 t Li vs reported 1626000.000 t Li (81.21% disagreement) QA fix: contained=1626000, reported=306000 BLOCK agreed — double-converted LCE; printed LCE 1.626Mt, printed native 0.306Mt Li
Probable	21.26 Mt	1,174 ppm Li	0.13 Mt LCE	29 Apr 2024	Mineral Reserve Estimate tableUnverified Evidence record Angel Island Probable · Li · as at 2024-04-29 Reported figure Area Whole project Basis 100% Ore tonnes (t) 21260000.0000 Grade 1174.0000 Contained (t LCE) 133000.0000 Classification Reserve Source trail CENTURY LITHIUM REPORTS UPDATED FEASIBILITY STUDY WITH AFTER-TAX NPV OF $4.01 BILLION AND OPERATING COSTS OF $4,389 PER TONNE OF LITHIUM CARBONATE FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA Mineral Reserve Estimate table Published 2026-02-23 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 24959.2400 t Li vs reported 133000.000 t Li (81.23% disagreement) \| QA fix: contained=133000, reported=25000 \| BLOCK agreed — double-converted LCE; printed LCE 0.133Mt, printed native 0.025Mt Li Copies a pre-filled issue record so you can send it through your normal channel.	notes (6)
Total Reserves	287.65 Mt	1,149 ppm Li	1.76 Mt LCE	03 Jan 2026	Mineral Resource and Reserve sectionUnverified Evidence record Angel Island Total Reserve · Li · as at 2026-01-03 Reported figure Area Whole project Basis 100% Ore tonnes (t) 287650000.0000 Grade 1149.0000 Contained (t LCE) 1759000.0000 Classification Reserve Source trail CENTURY LITHIUM FILES TECHNICAL REPORT ON THE FEASIBILITY STUDY FOR THE ANGEL ISLAND LITHIUM PROJECT, NEVADA Mineral Resource and Reserve section Published 2026-03-09 Verification Approved; not independently verified · Model extracted QA BLOCK: recomputed contained 330509.8500 t Li vs reported 1759000.000 t Li (81.21% disagreement) \| QA fix: contained=1759000 \| block agreed — double-converted LCE ×5.3228; print: 287.65Mt @ 1,149ppm containing 1.759Mt LCE; reported correct native-LCE Copies a pre-filled issue record so you can send it through your normal channel.	notes (4)