28 November 2025

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

Notice of Annual General Meeting and Electronic Communications

CleanTech Lithium PLC (AIM:CTL, Frankfurt:T2N), an exploration and development company advancing next-generation sustainable lithium projects in Chile for the EV transition, will hold its Annual General Meeting ("AGM") at its registered office at de Carteret House, 7 Castle Street, St Helier JE2 3BT on 22 December 2025 at 11:00 a.m. GMT

The Notice and a template of the proxy form for the 2025 AGM will be available on the Company's website today and will additionally be dispatched to shareholders.

In addition to the AGM notice, shareholder attention is also drawn to the fact that the Company has chosen to communicate electronically with its shareholders in certain situations.

The Articles allow the Company to use its website to publish statutory documents and communications to shareholders, such as the Annual Report and Accounts, as its default method of publication.  Therefore, in future, it is the Company's preference to publish Notice of Meetings, including AGM, Annual Report and Accounts and other statutory communications, on the Company website at www.ctlithium.com.  Reducing the number of communications sent by post will not only reduce the impact that the unnecessary printing and distribution of reports has on the environment but also result in cost savings for the Company.

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**