Announcement PDF RNS Number : 5788J Aterian PLC 21 May 2025 Aterian Plc ("Aterian" or the "Company") Notice of AGM Aterian Plc (LSE: ATN),the critical metal-focused exploration and development company, announces that its Annual General Meeting ("AGM") will be held on 19 June 2025 at the offices of Hill Dickinson LLP, The Broadgate Tower, 20 Primrose Street, London, EC2A 2EW at 3 p.m. The Notice of AGM and Form of Proxy will be posted to shareholders today. Copies of these documents will shortly be available from the Company's websitewww.aterianplc.com. - ENDS This announcement contains information which, prior to its disclosure, was inside information as stipulated under Regulation 11 of the Market Abuse (Amendment) (EU Exit) Regulations 2019/310 (as amended). For further information, please visit the Company's website: www.aterianplc.comor contact: Aterian Plc: Charles Bray, Executive Chairman - charles.bray@aterianplc.com Simon Rollason, Director - simon.rollason@aterianplc.com Financial Adviser and Joint Broker: Novum Securities Limited David Coffman / Anastassiya Eley Colin Rowbury Tel: +44 (0)207 399 9400 Joint Broker: SP Angel Corporate Finance LLP Ewan Leggat / Adam Cowl Tel: +44 20 3470 0470 Financial PR: Bold Voodoo - ben@baldvoodoo.com Ben Kilbey Tel: +44 (0)7811 209 344 Notes to Editors: About Aterian plc www.aterianplc.com Aterian plc is an LSE-listed exploration and development company with a diversified African portfolio of critical metals projects. Aterian plc is actively seeking to acquire and develop new critical metal resources to strengthen its existing asset base while supporting ethical and sustainable supply chains as the world transitions to a sustainable, renewable future. The supply of these metals is vital for developing the renewable energy, automotive, and electronic manufacturing sectors, which are increasingly important in reducing carbon emissions and meeting global climate ambitions. The Company has entered into a joint venture agreement with Rio Tinto Mining and Exploration Limited. Rio Tinto will earn into the HCK project in southern Rwanda, exploring and developing a lithium-tantalum-niobium-tin mining operation. The Company also holds an exploration licence in Rwanda. Aterian has a portfolio of multiple copper-silver (+ gold) and base metal projects in Morocco. Aterian holds a 90% interest in Atlantis Metals, a private Botswana-registered company holding seven mineral prospecting licences for copper-silver in the worldrenowned Kalahari Copperbelt and three for lithium brine exploration in the Makgadikgadi Pans region. The Company's strategy is to seek new exploration and production opportunities across the African continent and to develop new sources of critical mineral assets for exploration, development, and trading. This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com. RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END NOAFIFVDERILFIE