19 December 2025

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

New CEOL Streamlined Process Opens For Laguna Verde

CleanTech Lithium PLC ("CleanTech Lithium" or "CleanTech" or the "Company") (AIM: CTL, Frankfurt:T2N), an exploration and development company advancing sustainable lithium projects in Chile, is pleased to announce the new streamlined process to be awarded a Special Lithium Operating Contract ("CEOL") for Laguna Verde is now officially open for applications.

Referring to the resolution published by the Ministry of Mining on Thursday 18^th December, applications can be made by 30^th January 2026. Once an application has been accepted, the Ministry of Mining department in charge of reviewing CEOL applications should respond within 30 days. CleanTech intends to make its application for the CEOL in the near future.

Ignacio Mehech, Chief Executive Officer of CleanTech Lithium, commented: "Following the successful indigenous consultations for Laguna Verde, the new streamlined process to be granted a CEOL has now officially been confirmed open. We will be making our application and, if successful, we will begin negociations with the Government early next year. We will provide a further update once we have applied."

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**