01 December 2025

CleanTech Lithium PLC ("CleanTech Lithium" or the "Company")

Legal action against subsidiary of CleanTech Lithium

CleanTech Lithium PLC (AIM:CTL, Frankfurt:T2N), an exploration and development company advancing sustainable lithium projects in Chile, notes a legal claim has been made by the vendors of 23 mining concessions at Laguna Verde acquired by its wholly owned subsidiary, CleanTech Laguna Verde SpA ("CLV"), pursuant to a sale and purchase agreement ("SPA") announced on 22 April 2024.

On 24 November 2025 the directors became aware that a legal action has been brought against CLV in Chile with the purpose of seeking payment of the second instalment under the SPA.  The payment was initially delayed (as announced 22 October 2024), but the ongoing delay in making that payment has given rise to the claim.

CLV was not legally served with the claim, and so court proceedings were held without CLV's knowledge or presence, preventing an opportunity to defend against it. In CLV's absence, a judgement from those proceedings was passed which awarded a lien over the issued share capital of CLV. 

CLV has submitted a petition before the relevant court seeking the annulment of the proceeding, based on improper service of the lawsuit, aiming to ensure due process of the law. The directors are confident that this petition will be resolved favourably.

The directors are satisfied that non-payment of the second instalment has no bearing on its application for the special lithium operating contract ("CEOL") for Laguna Verde, which is to be applied for through a different CleanTech subsidiary when the process recommences.

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.

Notes

CleanTech Lithium (AIM:CTL, Frankfurt:T2N) 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 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. Direct Lithium Extraction is a transformative technology which removes lithium from brine with higher recoveries, short development lead times and no extensive evaporation pond construction. For more information, please visit: www.ctlithium.com

**ENDS**