Notice of Investor Webcast

Summary by AI ^BETAClose X

East Star Resources Plc will host an investor webcast on December 16, 2025, to discuss its US$25 million+ gold exploration joint venture with Endeavour Exploration Limited and a US$65 million farm-in agreement with an EPC partner to advance the Verkhuba Copper Deposit. The company will not be providing any new material financial or other information during this update.

Disclaimer*

East Star Resources PLC

12 December 2025

East Star Resources Plc

("East Star" or the "Company")

Notice of Investor Webcast

East Star Resources Plc (LSE: EST), the Kazakhstan-focused gold and base metals explorer, will host a presentation and Q&A via the Investor Meet Company platform at 11.00 a.m. GMT on Tuesday, 16 December 2025.

The presentation, titled 'Company Update', will discuss, inter alia, the US$25M+ gold exploration joint venture with Endeavour Exploration Limited ("Endeavour"), as well as Endeavour's investment into the Company, and the recently announced US$65M farm-in agreement with a leading EPC partner to advance the Verkhuba Copper Deposit and bring it into production.

The presentation, which will be hosted by Alex Walker, CEO, is open to all existing and potential shareholders. Questions can be submitted pre-event via the Investor Meet Company dashboard up until 9.00 a.m. GMT on 15 December 2025, or at any time during the presentation. A recording of the presentation will be made available on the Company's website later that day.

Investors can sign up to Investor Meet Company for free and add East Star Resources Plc in order to attend the Webcast via: https://www.investormeetcompany.com/east-star-resources-plc/register-investor. Investors who already follow East Star on the Investor Meet Company platform will automatically be invited.

No material new financial or other information will be provided.

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:

· A joint venture with Hong Kong Xinhai Mining Services Limited to take the Verkhuba Deposit (20.3Mt @ 1.16% copper, 1.54% zinc and 0.27% lead) into production (at no further cost to East Star) with East Star retaining 30% ownership in production

· A second VMS Exploration Target with up to 23Mt @ 2.4% copper equivalent in the same region, with numerous other targets being advanced to drill-ready status

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

· Tier 1 potential copper porphyry targets and epithermal gold targets in a proven copper porphyry and epithermal belt

Visit our website:

www.eaststarplc.com

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

X: https://x.com/EastStar_PLC

Subscribe to our email alert service to be notified whenever East Star releases news:

www.eaststarplc.com/newsalerts

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