Vital Exploration Goal for the Rulikha Deposit

East Star Sources Plc (LSE: EST), the Kazakhstan-focused gold and base metals explorer, is happy to announce an Impartial JORC-Compliant Exploration Goal (the “Exploration Goal”) for the Soviet-era Rulikha Deposit. The Rulikha Deposit is situated totally on East Star’s 100%-owned tenements within the East Area of Kazakhstan. The estimate accommodates an higher restrict of 23Mt @ 2.4% copper equal (CuEq), constrained by an open pit utilizing the processing recoveries and metallic costs contained in Desk 2 beneath. Utilizing the higher restrict evaluation, the deposit has the potential to include over 550,000 tonnes of copper; practically double the CuEq metallic of the Firm’s Verkhuba Copper Deposit.

The city of Rulikha and the district of Shemonaikha have already offered East Star with the required land entry approvals to drill, nevertheless, additional environmental approvals are nonetheless required.

Highlights:

• Close to-surface, high-grade copper
  • Vein 1 accommodates very excessive Cu grades and vital thickness
  • Mineralisation begins from roughly 30 m depth leading to a low strip ratio
• A number of payable metals
  • Contributions from Zn, Ag, Pb and Au enhance optionality and potential economics
• Wonderful infrastructure
  • Rail (<2km), roads, energy strains, present concentrators inside trucking/rail distance
• Massive mineralised system
  • Quite a few mineralised lenses over a 1.9 km strike
  • Further untested anomalies (such because the Rulikha North IP goal) present vital upside past present modelling
• Water, the native settlement, and transferring infrastructure are three hurdles which have to be overcome for allowing drilling and any future mining of this accretion
• The total report might be discovered right here: https://www.eaststarplc.com/presentationsandreports

Desk 1: Exploration Goal, Higher and Decrease Restrict

Impartial Guide Suggestions to Convert to a Mineral Useful resource

1. Verification/twin drilling of Vein 1 and higher lens system

2. Infill drilling to substantiate continuity and cut back spacing

3. Density measurements

4. Metallurgical sampling

5. Regulatory approvals for water-protection areas

Alex Walker, CEO of East Star Sources, commented:

“We’re delighted so as to add a second and vital multi-element superior exploration goal to our portfolio. If transformed to a JORC useful resource, Rulikha may enhance our copper stock by 3 times, whereas the financial modelling, based mostly on the restricted historic drill knowledge obtainable, offers an early indication of an especially sturdy operation. East Star might want to undertake the numerous consulting work to advance this undertaking, and we stay up for working with the federal government and native communities to understand the shared advantages such a growth may deliver.”

Determine 1: Two Precedence Goal Areas Requiring Verification Drilling

Determine 2: Samples from Web site Containing Copper Oxides and Sulphides Immediately Above Goal 1

Desk 2: Pit Optimisation Parameters

Reference

Nichols, R (2025) Estimation and Reporting of an Exploration Goal for the Rulikha Deposit, East Kazakhstan. [Accessed 20 November 2025]. Out there at: https://www.eaststarplc.com/presentationsandreports

Contacts:

East Star Sources Plc

Alex Walker, Chief Govt Officer
Tel: +44 (0)20 7390 0234 (through Vigo Consulting)

SI Capital (Company Dealer)

Nick Emerson
Tel: +44 (0)1483 413 500

Vigo Consulting (Investor Relations)

Ben Simons / Peter Jacob / Anna Stacey
Tel: +44 (0)20 7390 0234

About East Star Sources Plc

East Star Sources is concentrated on the invention and growth of copper and gold in Kazakhstan. The Firm is pursuing a number of exploration methods together with:

• Volcanogenic huge sulphide (VMS) exploration, which to this point features a deposit with a maiden JORC MRE of 20.3Mt @ 1.16% copper, 1.54% zinc and 0.27% lead, in an infrastructure-rich area, amenable to a low capex growth
• Copper porphyry and epithermal gold exploration, with a number of alternatives for Tier 1 deposits and a $25 million+ strategic JV settlement with Endeavour Mining for gold exploration

Go to our web site:

www.eaststarplc.com

Observe us on social media:

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

X: https://x.com/EastStar_PLC

Subscribe to our e-mail alert service to be notified at any time when East Star releases information:

www.eaststarplc.com/newsalerts

The one that organized for the discharge of this announcement was Alex Walker, CEO of the Firm.

This announcement accommodates inside data for the needs of Article 7 of Regulation 2014/596/EU which is a part of home UK regulation pursuant to the Market Abuse (Modification) (EU Exit) Rules (SI 2019/310) (“UK MAR”). Upon the publication of this announcement, this inside data (as outlined in UK MAR) is now thought of to be within the public area.

Supply