Verkhuba Copper Deposit - Transaction Discussions

1 December 2025

East Star Resources Plc

("East Star" or the "Company")

Verkhuba Copper Deposit - Transaction Discussions

East Star Resources Plc (LSE:EST), the Kazakhstan-focused gold and base metals explorer, announces it is in advanced transaction discussions which may or may not lead to a joint venture agreement in respect of the Verkhuba Copper Deposit ("Verkhuba") in the East Region of Kazakhstan. The transaction, if concluded, may result in a partner, with mine and plant construction and operating experience, developing Verkhuba in return for a majority interest in the licence. There can be no certainty that any transaction will proceed, or as to the terms of any such transaction.

Contacts:

East Star Resources Plc

Alex Walker, Chief Executive Officer

Tel: +44 (0)20 7390 0234 (via Vigo Consulting)

SI Capital (Corporate Broker)

Nick Emerson

Tel: +44 (0)1483 413 500

Vigo Consulting (Investor Relations)

Ben Simons / Peter Jacob

Tel: +44 (0)20 7390 0234

About East Star Resources Plc

East Star Resources is focused on the discovery and development of copper and gold in Kazakhstan. The Company is pursuing multiple exploration strategies including:

· Volcanogenic massive sulphide (VMS) exploration, with a maiden JORC MRE of 20.3Mt @ 1.16% copper, 1.54% zinc and 0.27% lead, in an infrastructure-rich region, amenable to a low capex development

· A 2nd VMS Exploration Target with up to 23Mt @ 2.4% copper equivalent in the same region

· $25 million+ strategic gold exploration joint venture with Endeavour Mining

· Tier 1 potential copper porphyry targets in a known copper porphyry belt

Visit our website:

www.eaststarplc.com

Follow us on social media:

LinkedIn: https://www.linkedin.com/company/east-star-resources/

X: https://x.com/EastStar_PLC   

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The person who arranged for the release of this announcement was Alex Walker, CEO of the Company.

This announcement contains inside information for the purposes of Article 7 of Regulation 2014/596/EU which is part of domestic UK law pursuant to the Market Abuse (Amendment) (EU Exit) Regulations (SI 2019/310) ("UK MAR"). Upon the publication of this announcement, this inside information (as defined in UK MAR) is now considered to be in the public domain.