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Frontier Advances Lithium Conversion Facility with Definitive Feasibility Study Award

Corporate Updates

FRONTIER ADVANCES LITHIUM

CONVERSION FACILITY WITH DEFINITIVE

FEASIBILITY STUDY AWARD

GREATER SUDBURY, ON

,

July 31, 2025

/CNW/ - Frontier Lithium Inc. (TSXV: FL) (OTCQX:

LITOF) ("Frontier" or the "Company") is pleased to announce the commencement of the Definitive

Feasibility Study ("DFS") for the lithium conversion facility (the "Project") in

Thunder Bay, Ontario

. As

a second definitive feasibility study, this work builds on the positive outcomes of the recently

completed mine and mill DFS, with a dedicated focus on evaluating a refinery supplied by Frontier

Lithium's own production and potential third-party feedstock. The Company has awarded the

feasibility scope for the Project to Fluor Canada Ltd. ("Fluor"), a leading engineering and

construction company that provides engineering, procurement, construction, maintenance, and

project management services across various industries.

Fluor will work with Frontier to deliver the comprehensive DFS, covering various work packages

such as infrastructure, process and design, cost estimation, economic valuation, procurement and a

technical report for Frontier. Fluor will also advance execution planning, and coordination with

specialized consultants supporting technical studies, reporting, and environmental assessments.

"After a thorough evaluation process, we have selected Fluor based on their global and North

American expertise in critical minerals development and their proven track record delivering large-

scale lithium processing and refinery projects," said

Trevor Walker

, President and Chief Executive

Officer of Frontier. "Advancing this phase of the Project is critical not only for Frontier, but for

ensuring that we continue to build a successful made-in-Canada EV battery supply chain. We're

confident in the lithium refining experience of our project team and excited to move forward into this

next phase".

The DFS will initially deliver a preliminary capital cost estimate laying the foundation for Frontier's

first commercial refining facility and long-term production strategy. These outcomes will also support

the goal of finalizing the contribution agreement's with both federal and provincial governments as

previously announced in the Company's

press release on

March 4, 2025

and highlighted in the

Province of

Ontario

budget on

May 15, 2025

. Frontier expects to complete the federal and provincial

government agreements in 2025/2026 and deliver the feasibility study within the next 18 months.

Frontier may consider future updates to reflect integrated economics of the mine and mill and

refinery projects, subject to funding progress.

The proposed Project, which is planned for the recently acquired Mission Island site (Figure A) in

Thunder Bay, Ontario

, will be designed to produce approximately 20,000 tonnes of lithium carbonate

equivalent (LCE) lithium hydroxide salts annually, once in production. This output could support

battery production for up to 500,000 electric vehicles per year. The Project will also be designed to

accommodate supply from other lithium deposits both in

Canada

and internationally, strengthening

Canada's

role in the global battery supply chain.

Frontier remains committed to sustainable resource development and to working collaboratively with

Indigenous community partners, stakeholders, and government agencies to ensure the successful

execution of this nationally significant critical minerals project in

Thunder Bay, Ontario

.

About Frontier Lithium

Frontier Lithium Inc. is a pre-production mining company with an objective to become a strategic and

integrated supplier of premium spodumene concentrates as well as battery-grade lithium salts to the

growing electric vehicle, and energy storage markets in

North America

. The Company's PAK Lithium

project maintains the largest land position and resource in a premium lithium mineral district located

in

Ontario's

Great Lakes region.

About the PAK Lithium Project

The PAK Lithium Project is a fully integrated critical minerals initiative in

Ontario

, developing

North

America's

highest-grade known lithium resource. Operated as a joint venture between Frontier

(92.5%) and Mitsubishi Corporation (7.5%), the project is advancing in parallel with a mine and mill

and a downstream conversion facility in

Thunder Bay, Ontario

both key to supporting a secure

domestic lithium supply for the clean energy transition. A 2025 Mine and Mill Feasibility Study (FS),

prepared by DRA and entitled National Instrument 43-101 Technical Report FS PAK Lithium Project,

Mine and Mill, outlines a 31-year Project life with an after-tax net present value of CA

$932 million

at

an 8% discount rate and an after-tax internal rate of return of 17.9%.These results were disclosed in

a press release dated

May 28, 2025

, and the accompanying technical report was filed on

July 9,

2025

on SEDAR+ (

www.sedarplus.ca

).

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain statements that may be deemed "forward-looking statements".

All statements in this release, other than statements of historical fact constitute forward-looking

statements. Forward looking statements contained in this news release may include, but are not

limited to, statements with respect to: capital requirements and private and/or public financing

initiatives, estimated mineral resources, estimated capital costs to construct mine facilities,

estimated operating costs, the duration of payback periods, estimated amounts of future production,

estimated cash flows, net present value, the DFS and statements that address future production,

resource and reserve potential, exploration drilling, exploitation activities and events or developments

that the Company expects, including but not limited to capital and operating costs, timelines, internal

rates of return, and project development milestones.

Forward-looking statements involve inherent risks and uncertainties. Risk factors that could cause

actual results to differ materially from those in forward looking statements include: market prices for

commodities, increases in capital or operating costs, construction risks, availability of infrastructure

including roads, regulatory and permitting risks, exploitation and exploration successes, continued

availability of capital and financing, financing costs, and general economic, market or business

conditions. Investors are cautioned that any such statements are not guarantees of future

performance and those actual results or developments may differ materially from those projected in

the forward-looking statements. For more information on the Company, please review the

Company's public filings available at

www.sedarplus.ca

.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is

defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy

or accuracy of this release.

Lithium Conversion Facility Rendering on Mission Island. (CNW Group/Frontier Lithium Inc.)

SOURCE

Frontier Lithium Inc.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/July2025/31/c9544.html

%SEDAR: 00008434E

For further information:

Company Contact Information: Bora Ugurgel, Senior Manager, Investor

Relations, 2614 Belisle Drive Val Caron, Greater Sudbury, Ontario, P3N 1B3 CANADA, T. +001

705.897.7622, F. +001 705.897.7618

CO: Frontier Lithium Inc.

CNW 08:00e 31-JUL-25