Exercise of Warrants

Altona (LSE: REE), a resource exploration and development company focused on critical raw materials in Africa, is pleased to announce an exercise of warrants over ordinary shares of £0.01 each in the capital of the Company ("Ordinary Shares").

Exercise of Warrants

The Company is pleased to announce that it has received Notices of Exercise from existing shareholders in respect of;

• 10,000,000 warrants at an exercise price of 1.5 pence per Ordinary Share ("1.5p Warrants"); and
• 666,667 warrants at an exercise price of 2.0 pence per Ordinary Share ("2p Warrants").

Accordingly, a further 10,666,667 new Ordinary Shares will be issued pursuant to these exercises.

This exercise of the 1.5p Warrants and the 2p Warrants brings in further cash funds of £163,333, which will be used to fund the fluorspar and gallium resource estimate and scoping study, as well as business development activities.

Admission and Total Voting Rights

The 1.5p Warrants have previously been disclosed in a published prospectus. The 2p Warrants are being issued from authorities granted to directors to issue new Ordinary Shares at the annual general meeting of the Company's shareholders on 26 November 2025.

The New Shares will be issued pursuant to the Company's block listing facility as announced to the market on 23 March 2026 and will be admitted on or around the date of issue being 22 April 2026. Following this issue of a further 10,666,667 new Ordinary Shares, which will rank pari passu with the Company's existing Ordinary Shares, the Company's enlarged share capital and total voting rights in the Company will comprise 440,732,779. The Company has no shares held in Treasury.

This figure of 440,732,779 Ordinary Shares may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the Company under the FCA's Disclosure Guidance and Transparency Rules.

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Altona Rare Earths Plc

Cédric Simonet, CEO +44 (0) 7778 866 108 (cs@altonare.com)

Louise Adrian, CFO +44 (0) 7721 492 922 (la@altonare.com)

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

Christopher Raggett

Imogen Ellis

Zeus Capital (Corporate Broker) +44 (0) 20 3829 5000

Simon Johnson

James Hornigold

About Altona Rare Earths Plc

The multi-commodity Monte Muambe Project in northwest Mozambique is a highly prospective tenement hosting rare earths, fluorspar, and gallium mineralisation. Since acquiring the project in June 2021, Altona has drilled over 7,800 metres, delivering a maiden JORC Mineral Resource Estimate of 13.6Mt at 2.42% TREO, secured a 25-year mining licence (granted December 2024), and published a Competent Person Report and scoping study for the rare earths component of the project (October 2023). The Company has received a US$ 1.875 million grant from USTDA to advance the rare earths project through the prefeasibility stage.

In parallel, Altona is progressing plans to fast-track the development of high-grade fluorspar veins identified along the western and southern margins of Monte Muambe, with a targeted production of 50,000 tonnes per annum of acid-grade fluorspar over a minimum 12-year mine life. Acid-grade fluorspar is a key input in a wide range of applications, including hydrofluoric acid, lithium battery electrolyte production, and nuclear fuel refining, placing Altona in a strong position to supply this critical material.