15 December 2025

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

Agreement Reached Following Conclusion Of Indigenous Consultations 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 indigenous consultations for the Special Lithium Operating Contract ("CEOL") in the Laguna Verde salar have officially concluded. Forming part of the CEOL process, it is now expected that the Ministry of Mining will open a new streamlined process for applications from private companies in the near future.

Highlights:

·    The indigenous consultations for the Laguna Verde salar have officially been declared closed by the Government with all parties in agreement to award a CEOL for Laguna Verde.

·    This has been one of the quickest consultations with indigenous communities across the lithium industry in Chile.

·    The opening of the streamlined process to be awarded a CEOL is now expected to be announced in the near future, enabling CleanTech Lithium to apply.

·    Laguna Verde is one of the areas prioritised in the National Lithium Strategy to allow private companies to develop lithium projects in order to scale Chile's production of lithium for the growing EV and Energy Storage markets.

·    With existing partnerships with indigenous communities, the Company anticipates its proposed CEOL application will be well received.

Ignacio Mehech, Chief Executive Officer of CleanTech Lithium, commented: "News of the indigenous consultations concluding for Laguna Verde is very positive to hear. This means the Government's streamlined process for CleanTech to apply for the CEOL should open in the near future. With our commitment to sustainable lithium production, strong partnerships with indigenous communities, we will be in a good position to apply for the CEOL. Once the streamlined process has opened for applications, investors can expect a further update from 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**