Announcement PDF RNS Number : 2630T East Star Resources PLC 03 September 2026 3 September 2026 East Star Resources Plc ("East Star" or the "Company") Snowy IP Survey Results New geophysical anomaly over epithermal gold target East Star Resources Plc (LSE:EST), the Kazakhstan-focused gold and copper exploration and development company, is pleased to announce the results of the induced polarisation ("IP") survey from the Snowy Epithermal Target in Central Kazakhstan. These lines are approximately 1km east of the IP lines completed in 2025. The 2026 IP lines were completed over an intensely altered tuff unit with numerous quartz veinlets noted. This area shows a distinct east-west striking chargeability trend associated with a volcanic unit being targeted for an epithermal deposit. The anomaly is discrete, spanning approximately 1,700 m west to east starting from 100 m depth. The anomaly is open to the west and east. The anomaly has amplitudes ranging from 7 - 9 m V/V. The amplitude is plausible for low sulphidation epithermal targets and requires further exploration to determine the source of the chargeability anomaly and test the quartz veining at depth. Figure 1 The location of the new IP lines in green, with highlighted gold samples Figure 2 Snowy IP Anomaly. Top: map showing IP lines and sample points. Bottom: 3D view of gold-bearing samples and IP sections superimposed on satellite imagery. Alex Walker, East Star CEO, commented: "Based on these results, we look forward to continuing to progress the Snowy Target for a potential low sulphidation epithermal deposit. The target sits between two known gold deposits of similar mineralisation and with gold samples at surface it remains a compelling target. The Company will determine the best path and timing to move to the next phase of exploration taking into account all of our other work plans, in particular the Endeavour joint venture field work." Survey Details The Snowy IP Survey was conducted as a pole-dipole survey comprising four north-south lines, each approximately 1,100 m in length, at a frequency of 0.125 Hz. Initial lines employed an attempted mixed 50 m / 100 m dipole configuration that was subsequently corrected by infill acquisition using 50 m dipole spacing with 50 m transmitter moves. Measurements were recorded simultaneously on a 32-channel receiver. Smart Geophysics from Kazakhstan conducted the survey using a GDD Tx4 transmitter and GDD Rx-32 receiver. Quality control and interpretation was conducted by Mitre Geophysics Pty Ltd out of Australia. Mitre noted that the survey did not achieve the designed charge input and therefore the results may return lower than expected chargeability anomalies. 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 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 at the Rulikha Deposit 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 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/P7NxNr 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. Competent Person Statement Scientific or technical information in this disclosure related to exploration was reviewed by Dr Tremain Woods, a full-time employee of Copperland Ltd, a 100% owned subsidiary of East Star Resources PLC. Dr Woods is a member in good standing with the Geological Society of South Africa. He has sufficient experience that is relevant to the commodity, style of mineralisation or type of deposit under consideration and activity which he is undertaking to qualify as a Competent Person under the JORC code (2012 Edition). 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. 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