29 May 2026

Lansdowne Resources PLC

("Lansdowne Resources" or the "Company")

Name Change to Lansdowne Resources PLC

Lansdowne Resources Plc (AIM: LRES) is pleased to announce that, following the passing of all resolutions at the Annual General Meeting held on 26 May 2026 and the completion of the acquisition of São Gabriel Mineração Ltda. ("SGM"), the Company's New Ordinary Shares were admitted to trading on the AIM Market of the London Stock Exchange on 27 May 2026. Dealings in the New Ordinary Shares commenced at 8.00 a.m. on 27 May 2026 under the ticker symbol LRES.

The Company announces its change of name from Lansdowne Oil & Gas PLC to Lansdowne Resources Plc with effect from 27 May 2026, following the issue of a new certificate of incorporation on change of name by the Registrar of Companies. The change of name reflects the broadened strategy of the Enlarged Group as it transitions from an oil and gas focused company to a diversified natural resources business with interests in critical minerals and energy transition commodities alongside its ongoing Energy Charter Treaty litigation.

The Company has acquired 100% of São Gabriel Mineração Ltda., a Brazilian company focused on developing the Macaubas graphite project in Bahia, Brazil, comprising two exploration licences covering 2,805.82 hectares . The project is located in a highly prospective graphite region with favourable logistics, shallow friable material amenable to low-impact mining, and the potential to host high quality large flake graphite mineralisation.

The Company raised gross proceeds of circa. £2,000,000 million through a placing and retail offer at 0.1 pence per share to fund an active 2026 exploration programme aimed at generating a Maiden Resource Estimate.

In addition, the Company continues to pursue its Energy Charter Treaty arbitration claim against the Government of Ireland seeking compensation of at least US$100 million plus interest in relation to the Barryroe oil and gas field, supported by non-recourse litigation funding from Diamond McCarthy LLP. A capital restructuring has been implemented to ensure that 80% of the net proceeds of any successful Claim are ring-fenced for Qualifying Shareholders (who have been issued with Preference Shares), with all shareholders on Readmission retaining exposure to the remaining 20%, providing the potential to build significant additional value alongside the Company's new critical minerals strategy.

Total Voting Rights

Following Admission, the Company's enlarged issued share capital consists of 2,638,982,667 Ordinary Shares of £0.0005 each, all carrying one vote each. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules.

Further information on the Company and the Macaubas project, including the AIM Admission Document, can be found on the Company's website at https://www.lansdowneresources.com/

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