Proposed Placing & Open Offer

Aminex PLC 02 June 2005 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN PART OR IN WHOLE IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA, JAPAN OR SOUTH AFRICA For immediate release 2nd June, 2005 Aminex PLC ("Aminex" or the "Company") Proposed Placing and Open Offer to raise up to Stg£6.6 million (€9.7 million) Highlights • Intention to place 50,800,000 Ordinary Shares at Stg 8.7p per share to raise approximately Stg£4.4 million (€6.5 million) (the "Placing"); • Intention to launch an Open Offer to qualifying shareholders of 24,973,433 Ordinary Shares on the basis of 1 new Ordinary Share for every 4 existing Ordinary Shares at Stg 8.7p per share to raise up to Stg£2.2 million (the "Open Offer"); and • Proceeds of the proposed Placing and Open Offer to fund capital expenditure on the Group's Tanzanian and North Korean acreage and other opportunities. The Board of Aminex is pleased to announce that Aminex intends to conditionally place firm 50,800,000 Ordinary Shares ("Placing Shares") with institutional and other investors, representing approximately 51% of the existing Issued Share Capital on 3 June 2005. The gross proceeds of the Placing will amount to approximately Stg£4.4 million (€6.5 million) and are intended to be used to fund capital expenditure for the Group's Tanzanian and North Korean acreage and other opportunities. The Placing is being arranged by Oriel and Davy. The Placing has not been underwritten and is conditional on Oriel, Davy and the Company entering into a placing agreement (the "Placing Agreement") which is expected to happen on 3 June 2005. In addition, the Placing will be conditional on shareholder approval, the Placing Agreement becoming unconditional in all respects and admission of the Placing Shares and the Open Offer Shares to the official lists of the Irish Stock Exchange and the UK Listing Authority and to trading on the main markets of the Irish Stock Exchange and the London Stock Exchange. In addition, the Company today announces that, subject to entering into the Placing Agreement, it intends to launch an Open Offer to qualifying shareholders of 24,973,433 Ordinary Shares ("Open Offer Shares") on the basis of 1 new Ordinary Share for every 4 existing Ordinary Shares at Stg 8.7p per share to raise up to Stg£2.2 million on 3 June 2005. A further announcement will be made in due course. For Further Information: Aminex PLC (+44 20 7240 1600) Brian Hall Oriel Securities Limited (+44 20 7710 7600) Simon Bragg/Scott Richardson Brown Davy Corporate Finance Limited (+353 1 679 6363) Hugh McCutcheon/Fergal Meegan Oriel Securities Limited (''Oriel'') (which is regulated in the UK by the Financial Services Authority) and Davy Corporate Finance Limited and J & E Davy (collectively ''Davy'') (each of which are regulated in Ireland by the Irish Financial Services Regulatory Authority) are acting exclusively for Aminex in connection with the requirements of the Irish Stock Exchange and the UK Listing Authority and for no one else and will not be responsible to any other person for providing the protection afforded to customers of Oriel and Davy nor for providing advice in connection with this announcement. This information is provided by RNS The company news service from the London Stock Exchange