OTCQB Listing and Company Update

Altona Rare Earths plc (LSE: REE), the critical raw materials exploration and development company focused on Africa, is pleased to announce that its ordinary shares have been approved for cross-trading on the OTCQB Venture Market in the United States ("OTCQB"). Trading is set to commence on 19 March 2026 under the ticker ANRCF.

This dual quotation on a recognised US platform for growth companies is a direct and strategic complement to the Company's recent $1.875 million grant from the U.S. Trade and Development Agency ("USTDA"). Together, these milestones forge a direct pathway to engage with North American capital and strategic partners, significantly enhancing the Company's profile within the world's largest and most vibrant critical minerals market.

OTCQB Listing: A Catalyst for US Engagement

The Board believes that admission to the OTCQB will be a key driver in broadening and diversifying the Company's shareholder base. By providing the same ease of access for North American institutional and retail investors as exists in the United Kingdom, this cross-trading facility is designed to enhance liquidity and increase Altona's visibility among potential partners seeking exposure to independent, secure sources of critical minerals, including rare earths and gallium. The Company's primary listing on the London Stock Exchange Main Market (ticker: "REE") remains unchanged, and existing shareholders are not required to take any action.

Strategic Alignment with the United States

Following the USTDA grant, the OTCQB quotation crystallises Altona's strategy to position itself at the heart of the United States critical minerals supply chain initiative.

The Board believes that the USTDA grant and the OTCQB quotation significantly strengthen the Company's position to pursue strategic opportunities within the United States rare earths and gallium industry, as part of its broader strategy to maximise the value of its critical minerals assets and contribute to the development of a diversified global supply chain. This strategy is further supported by clear and tangible policy actions by the United States government, as well as by the current geopolitical environment and by strengthening market fundamentals for rare earth elements and gallium. Neodymium and praseodymium oxide prices have increased by over 50% since the beginning of the year and by over 100% year-on-year, and gallium prices have recently reached historical highs.

Possible growth opportunities for Altona could include processing, separation, magnet manufacturing and other value-added activities that support the development of a resilient and responsible Western rare earth and gallium supply chain.

Accordingly, over the coming months Altona intends to actively pursue and evaluate potential partnerships, including upstream consolidation opportunities as well as integration with mid-stream and downstream participants in the United States rare earths and gallium value chains. The Company will report to shareholders as this strategic workstream progresses.

Monte Muambe Operational Update: Derisking and Expanding Value

The majority of the fluorspar and gallium assay results from the 2025 drilling campaign at Monte Muambe have been received. Mineral Resource Estimate preparation work is underway. Concurrently, metallurgical test work for fluorspar extraction is progressing in South Africa.

Following the receipt of consistent gallium results from the 2025 drilling campaign, the Company has initiated metallurgical test work for gallium extraction and recovery. Representative samples have now been dispatched to laboratories for testing of automated ore sorting beneficiation and hydrometallurgy extraction methods.

Cedric Simonet, CEO, commented: "The rapid approval of our OTCQB listing is not just an administrative milestone; it is a pivotal moment that anchors Altona deeper within the US critical minerals ecosystem. When combined with our USTDA grant, it provides us with a powerful, two-pronged platform to engage with American capital and strategic partners.

"The current geopolitical and market environment - substantiated by surging rare earth and gallium prices - is exceptionally favorable for creating value through supply chain consolidation and integration. The consistent progress at Monte Muambe, particularly the rare earths and the new gallium work stream, strengthens Altona's position as a contender for these strategic opportunities. Maximising this position will be our primary focus in the coming months as we look to accelerate the Company's growth trajectory."

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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.