Investor presentation on Gallium discovery

2 May 2025

ALTONA RARE EARTHS PLC

("Altona" or "the Company")

INVESTOR PRESENTATION VIA INVESTOR MEET COMPANY

Altona (LSE: REE), a resource exploration and development company focused on critical raw materials in Africa, announces that Cedric Simonet, Chief Executive Officer, will provide a live presentation relating to the Monte Muambe Gallium discovery and its significance, on 08 May 2025 at 18:00 BST, via the Investor Meet Company platform.

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard until 07 May 2025, 09:00 BST, or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet Altona via:

https://www.investormeetcompany.com/altona-rare-earths-plc/register-investor

Investors who already follow Altona on the Investor Meet Company platform will automatically be invited.

To subscribe for RNS alerts, please join our investor hub on: https://investors.altonare.com/auth/signup

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Altona Rare Earths Plc

Cédric Simonet, CEO +44 (0) 7778 866 108

Louise Adrian, CFO +44 (0) 7721 492 922

Strand Hanson (Financial Adviser) +44 (0) 20 7409 3494

Christopher Raggett

About Altona Rare Earths Plc

Altona is a resource exploration and development company focused on critical raw materials in Africa. The Company is listed on the Main Market of the London Stock Exchange with the ticker "REE". The Company currently holds copper, fluorspar and rare earths projects.

The Monte Muambe rare earths, gallium and fluorspar project is located in Northwest Mozambique. The Project was acquired in June 2021, and the Company has so far drilled over 7,800m, and defined a maiden JORC Mineral Resource Estimate of 13.6 million tons at 2.42% TREO. A Competent Person Report including the Scoping Study for Monte Muambe was published on 18 October 2023. The Project is now at Prefeasibility Study stage, with a focus on metallurgical testing for rare earths extraction.

The Company is assessing the possibility of rapidly putting in production high-grade fluorspar veins occurring at Monte Muambe along the western margin of the rare earth bearing carbonatite intrusion. The Company is also assessing the potential of recently discovered gallium occurrences.

Altona is presently diversifying its portfolio by acquiring a limited number of critical raw material projects to complement Monte Muambe. The acquisitions of the Kabompo South copper project in Zambia and of the Sesana copper-silver project in Botswana, located just 25 km from MMG's Khoemacau Zone 5 copper-silver mine, represent the first steps towards the implementation of this expanded strategy.