Reese Ridge Zinc-Lead-Silver Project Update

Sunrise Resources plc is pleased to announce that it has commissioned Canadian Company Geotech Ltd (“Geotech”) to undertake a comprehensive evaluation and interpretation of geophysical data for its Reese Ridge Zinc-Lead-Silver (-Gallium) Project in Nevada, USA using sophisticated AI based tools to refine drill targets.

This follows the Company’s announcement of 14 July 2026 to increase the focus on its portfolio of precious and base metal projects in Nevada and the announcement of further high-grade surface sampling results from Reese Ridge on 6 August 2026.

“High-grade mineralisation outcrops at Reese Ridge in places over a wide area and is characteristic of the Carbonate Replacement Deposit (CRD) Style of Mineralisation which can be both large and high-grade.

“The work now commissioned will utilise Self-Organising Mapping tools based on artificial intelligence to refine drill targets with the objective of significantly increasing the chances of discovery.”

Patrick Cheetham, Executive Chairman

Detailed information

The Company’s wholly owned Reese Ridge Project is situated on the southern margin of the highly prospective Humboldt Structural Zone, approximately 52 miles south-southwest of Battle Mountain, Nevada. The Project covers a fault-bounded limestone horst block that is juxtaposed against younger sedimentary rocks and flanked to the east and west by Tertiary volcano-sedimentary basins.

This geological setting is considered by the Company to be highly prospective for CRD style mineralisation. Numerous iron-rich gossans developed from massive and semi-massive sulphides occur throughout the property and first attracted both historical prospectors and the Company. Sampling of these gossans has consistently returned anomalous zinc, lead and silver values, with assays of up to 6.8% zinc, 3.3% lead and 51g/t silver, while forty-three samples collected from gossans and historical workings averaged 0.86% zinc.

Subsequent exploration identified a more subtle style of mineralisation hosted within altered limestone containing only sparse visible galena. Initial sampling returned an exceptional assay of 15.9% zinc, despite the subdued visual appearance of the rock. Follow-up work subsequently identified assays of up to 29.6% zinc, together with 68ppm gallium. Unlike the iron-rich gossans, these zinc-rich zones contain oxide and carbonate minerals that are difficult to recognise visually in the field, suggesting that significant mineralisation may previously have been overlooked. Most recently, the Company’s Nevada-based geological consultant, Ivan Johnston, completed a programme of reconnaissance mapping as announced on 6 August 2026.

Geotech, a global leader in technological innovation for airborne geophysical survey mapping, interpretation and analysis, holds a proprietary geophysical database collected during exploration of the adjacent Reese River geothermal system for geothermal energy. This exploration has included a number of geophysical techniques common to the mineral exploration industry, including MT (magneto-telluric) and ZTEM (airborne electromagnetic) methods and magnetic surveys. Both ZTEM and MT surveys have independently identified a zone of low resistivity 250m below the surface mineralisation identified by the Company that may be indicative of a large body of mineralisation. Geotech has previously carried out interpretation of the ZTEM data for the Company and has now been commissioned to carry out further evaluation and integration of the magnetic survey data with electromagnetic data.

This will include:

3D magnetic vector inversion of magnetic data for Magnetisation Amplitude (“MVI”) and Magnetic Susceptibility (“MS”).

Magnetic Structural Complexity Analysis (“CS”)

Integrated interpretation including analysis of Structural Complexities, Self-Organising Map (SOM) analysis of 3D ZTEM inversion results, 3D MVI and MS inversion results.

SOM analysis is a sophisticated tool based on artificial intelligence.

The work programme now commissioned is expected to take 6-8 weeks to complete.

Shares in the Company trade on AIM. EPIC: "SRES”.

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Distribution

This announcement has been notified via a Regulatory Information Service and it is not authorised for distribution into North America or any other jurisdiction where to do so would constitute a violation of the relevant laws or regulations of that jurisdiction. Shares in the Company trade on AIM. EPIC: "SRES”. Website: www.sunriseresourcesplc.com