GR Silver Reports Significant Drill Results at San Marcial: 21.9 m at 168 g/t Ag including 6.15 m at 447 g/t Ag in the SE Area

About this update from Gr Silver Mining Ltd.

VANCOUVER, BC, July 10, 2026 /CNW/ -  GR Silver Mining Ltd. ( "GR Silver Mining" or the "Company" ) (TSXV: GRSL) (OTCQX: GRSLF) (FRANKFURT: GPE) is pleased to announce positive drill results from the resource expansion drilling program at the San Marcial Area in the Plomosas Project, Mexico. Diamond drilling on the SE Extension target confirms the extension of high-grade silver mineralization for least an additional 150 metres to the southeast of the 2023 NI 43-101 Mineral Resource Estimate ("MRE") boundary. The drill hole results reported in this release represent two separate target areas: 1) the SE Extension target, looking to expand the existing MRE to the southeast along the main, breccia-hosted structures; and 2) the Parallel Breccia target, which aims to understand the nature of prospective newly identified mineralized structures in the vicinity of the MRE (Figure 1). Highlights of Latest Step-Out Drilling at San Marcial GR Silver Mining's President and CEO, Eric Zaunscherb, commented, "The results from two new resource expansion areas at San Marcial demonstrate the continued effectiveness of our 20,000-metre drilling program and reinforce our confidence in the exploration potential of both the Southeastern Extension and the Parallel Breccia. We look forward to further advancing these targets as we continue to better define and expand the mineralized system. As the program advances, new data will allow us to follow up on higher-grade features like the dilation zone intersected in Hole SMS26-04 in the SE Area, which returned 45.1 m estimated true width at 1,623 g/t Ag, including 8.25 m TW at 8,579 g/t Ag (see News Release dated May 19, 2026)."

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