Announcement PDF RNS Number : 7744X East Star Resources PLC 06 October 2026 6 October 2026 East Star Resources Plc ("East Star", the "Company") Rulikha Copper Project Drilling Update Drilling approval for Licence 3631 received and drill rig mobilised East Star Resources Plc (LSE: EST), the Kazakhstan-focused gold and copper exploration and development company, is pleased to provide an update on exploration activities at the Rulikha Copper Project ("Rulikha"), being advanced through its joint venture ("JV") with Kazakh company, Nova Ltd ("Nova"). All permissions for drilling on Licence 3631 have now been received. A drilling contract has been executed and a drill rig has been mobilised to site, with drilling operations commencing on 5 October 2026, at no cost to East Star. Drilling is expected to initially comprise five drill holes across two target areas for approximately 1,500 metres and is designed to verify historically logged mineralisation. As announced on 1 September 2026, a binding Heads of Agreement was signed with Nova under which Nova will farm into Rulikha and advance it through development to production, at no further cost to East Star. The Company is fully carried to production, at which point it will hold between 25% and 35% of the producing mine. Alex Walker, CEO of East Star, commented: "We are pleased to have received all required permissions and commenced drilling at Rulikha in short order. The current programme is expected to comprise five holes across Target Areas 1 and 2, which made up the bulk of the exploration target defined by historical drill logs that the JV aims to convert into a resource. We look forward to updating the market as the programme progresses." To watch a video of Tremain Woods, Exploration Manager of East Star, speaking from Rulikha, visit: https://eaststarplc.com/link/yE28pe Figure 1: Target Areas 1 and 2 - the focus of the current drill programme 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 / George Pope / Georgina Moul 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' key interests are: · A joint venture with Hong Kong Xinhai Mining Services Limited to take the Verkhuba Copper 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 joint venture with a Kazakh mining company to develop the Rulikha project (exploration target of 23Mt @ 2.4% copper equivalent) into production (at no further cost to East Star) with East Star retaining between 25% and 35% ownership in production · A $25 million+ strategic gold exploration joint venture with FTSE 100 Endeavour Mining · Tier 1 potential copper porphyry and epithermal gold targets in a proven 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 Engage with us by asking questions, watching video summaries and seeing what other shareholders have to say. Navigate to our interactive Investor Hub here: https://eaststarplc.com/link/yE28pe Subscribe to our news alert service: https://eaststarplc.com/regulatory-news 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. 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 UPDZZMGGKVRGVZG