11 August 2025

Metals One Plc

("Metals One" or the "Company")

Investment in CleanTech Lithium Plc

Metals One (AIM: MET1), a minerals exploration and development company with key interests in uranium and gold projects, is pleased to announce an investment of £1 million in CleanTech Lithium Plc (AIM: CTL, Frankfurt:T2N) ("CleanTech Lithium"), pursuant to its placing announced on 11 August 2025. As a result, Metals One will own approximately 10.7% of CleanTech Lithium's enlarged issued share capital. The investment is conditional on CleanTech Lithium's shareholders approving certain resolutions to issue the placing shares at a General Meeting expected to be held on 29 August 2025.

CleanTech Lithium

CleanTech Lithium is an exploration and development company advancing lithium projects in Chile for the clean energy transition. CleanTech Lithium has two key lithium projects in Chile, Laguna Verde and Viento Andino, and an exploration stage project in Arenas Blancas (Salar de Atacama), located in the lithium triangle, a leading centre for battery grade lithium production.

CleanTech Lithium is committed to utilising Direct Lithium Extraction ("DLE") with reinjection of spent brine resulting in no aquifer depletion. DLE is a transformative technology which removes lithium from brine with higher recoveries, short development lead times and no extensive evaporation pond construction.

CleanTech Lithium's portfolio of projects in the Chilean part of the lithium triangle have a combined total JORC resource estimate of 2.55 million tonnes of lithium carbonate equivalent and completed scoping studies showing strong economics. The Laguna Verde project is at the Preliminary Feasibility Stage ("PFS"). This is well-advanced and will be finalised once the CEOL (Special Lithium Operation Contract) and resource area is determined.

Laguna Verde

Laguna Verde is the flagship project which CleanTech Lithium is developing into a multi-decade commercial DLE production asset. The granting of CEOL and completion of the PFS will be key milestones for starting substantive discussions with strategic partners to support financing and project development.

Viento Andino

Viento Andino is a new lithium discovery made in 2022. Located 100 km from Laguna Verde, Viento Andino is the second development project of CleanTech Lithium and, based on a scoping study, has promising economics.

Investment Details

Metals One is participating in CleanTech Lithium's announced £4.3 million equity fundraise by subscribing £1 million in cash for 20 million new shares at a price of 5 pence per share. This participation will result in Metals One holding a minority stake in CleanTech Lithium, representing approximately 10.7% of CleanTech Lithium's enlarged issued share capital. The investment is a passive holding and does not confer any controlling interest or influence over CleanTech Lithium.

CleanTech Lithium's placing enables it to fund the acquisition of additional licences to advance the Laguna Verde Project, complete and publish the PFS and DLE technical work, and provides general working capital.

The publication of the PFS, which is expected to occur when CleanTech Lithium is entered into a streamlined CEOL process, will assist the company in various discussions when it will be seeking to introduce a strategic investor into the project to fund work, including a Definitive Feasibility Study and Environmental Impact Assessment, leading to a Final Investment Decision.

Craig Moulton, Chairman of Metals One, commented:

"This investment in CleanTech Lithium further diversifies Metals One's critical minerals commodity exposure. Lithium is a key metal for the green transition with long-term fundamentals that point to sustained demand growth into the next decade. We regard this is an opportunistic low value entry into what is expected to be Chile's next major lithium project with key value catalysts in the near-term that will position CleanTech Lithium for a significant re-rating."

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About Metals One

Metals One is pursuing a strategic portfolio of critical and precious metals projects^* in low-risk jurisdictions, underpinned by the Western World's urgent need for reliably and responsibly sourced raw materials, and record high gold prices.

Our commodity exposure^* includes gold, uranium, vanadium, copper, nickel, lithium, cobalt, zinc, and platinum group metals.

Our most advanced project is the Black Schist Project in Finland with a 57.1 Mt nickel-copper-cobalt-zinc JORC Inferred Resource adjacent to one of Europe's largest nickel producers.

Our project portfolio^* spans the USA, Finland and Norway.

Metals One's shares are listed on the London Stock Exchange's AIM Market (MET1).

^*Includes projects for which acquisition terms have been agreed pending completion.

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Market Abuse Regulation (MAR) Disclosure

The information set out below is provided in accordance with the requirements of Article 19(3) of the Market Abuse Regulations (EU) No. 596/2014 which forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 ('MAR').

Nominated Adviser

Beaumont Cornish Limited ("Beaumont Cornish") is the Company's Nominated Adviser and is authorised and regulated by the FCA. Beaumont Cornish's responsibilities as the Company's Nominated Adviser, including a responsibility to advise and guide the Company on its responsibilities under the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed solely to the London Stock Exchange. Beaumont Cornish is not acting for and will not be responsible to any other persons for providing protections afforded to customers of Beaumont Cornish nor for advising them in relation to the proposed arrangements described in this announcement or any matter referred to in it.