Heliostar Metals Set to Expand La Colorada with Strong Drill Results and Key Permits

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HIGHLIGHTS: Veta Madre drilling: 10.9 m grading 22.1 g/t gold from 187.7 m, including 1.3 m grading 174 g/t gold 40.8 m grading 2.23 g/t gold from 51.3 m, including 17.45 m grading 4.55 g/t gold 147.2 m grading 0.70 g/t gold from 32.65 m, including 10.7 m grading 1.98 g/t gold 20.65 m grading 3.35 g/t gold from 337.4 m 32.0 m grading 1.65 g/t gold from 52.5 m 52.35 m grading 1.23 g/t gold from 50.3 m Significant intervals of mineralization outside of the current Veta Madre reserve pit Final approvals for Veta Madre pit expansion received from the Mexican permitting agency Engineering of Veta Madre Plus pit is ongoing with waste stripping on track to start in early Q3 2026 Vancouver, British Columbia--(Newsfile Corp. - June 18, 2026) - Heliostar Metals Ltd. (TSXV: HSTR) (OTCQX: HSTXF) (FSE: RGG1) ("Heliostar" or the "Company") is pleased to announce drill results from the Veta Madre pit area at its operating La Colorada mine in Sonora, Mexico. The drill program aimed to identify mineralization to expand the current 376,200 ounces of gold (17.1 Mt grading 0.68 grams per tonne ("g/t") gold) currently in reserves at La Colorada. The additional mineralization can support a larger pit cutback, called Veta Madre Plus that the Company intends to commence in early Q3, this year. Heliostar CEO, Charles Funk, commented, "The expansion of the Veta Madre Pit is the next step in our plan to grow Heliostar's production profile. We are currently designing a larger pit shape to commence pre-stripping in the next two months and are targeting an additional 20,000 ounces of gold above the current mine plan. With all permits received, we are on track to start producing gold from the pit in the first half of next year. Cash flows from La Colorada and San Agustin will support construction of our flagship Ana Paula project and are key deliverables for Heliostar's aggressive growth ambitions." Permit Receipt The Company recently received the final documentation for the Change of Use of Soils ("CUS") permit for the Veta Madre pit expansion announced on December 15, 2025. That is in addition to the existing environmental permits for the Veta Madre pit expansion and a leach pad expansion. The Company's permits support both the technical report pit design for Veta Madre and the potential larger Veta Madre Plus pit. Drilling Program Heliostar has completed 44 holes and 8,425 metres to...

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