Mr. Marcio Fonseca reports

GR SILVER MINING ENHANCES ITS MEXICAN LEADERSHIP TEAM APPOINTING ING. CASTULO MOLINA SOTELO AS COUNTRY MANAGER

GR Silver Mining Ltd. has appointed Dr. Castulo Molina Sotelo as country manager, Mexico.

Dr. Molina brings more than 35 years of experience in mineral exploration, geology, and the technical and operational management of major precious metal projects in Mexico. He is a specialist in epithermal precious metal exploration, operations management and satellite image processing, and has held senior executive and leadership positions in key mining institutions across the country. During his tenure with Coeur Mining Inc. (2007 to 2021), he played a pivotal role in the exploration, discovery and development of the Palmarejo mine. He served as senior vice-president for Mexico, where he co-ordinated multidisciplinary teams, legal and technical, through all stages of project development. Dr. Molina is a certified professional geologist (CPG) with the American Institute of Professional Geologists (AIPG) and is fluent in both Spanish and English.

Dr. Molina is also a founding member of the Chihuahua State Mining Cluster (CLUMIN) and has served for seven years on the board of directors of the Mexican Chamber of Mines (CAMIMEX). In both capacities, he has fostered strong relationships across the mining industry and with regulatory authorities.

Earning his degree as Ingeniero Geologo from the Universidad Autonoma de Chihuahua, Dr. Molina went on to obtain an MSc in structural geology and a PhD in geological sciences, both from the University of Texas at El Paso.

GR Silver Mining's president and chief executive officer, Marcio Fonseca, commented: "Dr. Molina's extensive hands-on experience in exploration, permitting and the development of large silver projects in Mexico -- from early stage exploration through to production -- will be a valuable asset to GR Silver Mining as the company embarks on a transformational phase in 2026. His proven track record, including leadership at Palmarejo and other major silver projects in Mexico, strengthens our confidence as we prepare for an active year ahead, marked by a significant stepout drilling program at the San Marcial area of the Plomosas silver project, and continued advancements and developments in Mexico."

GR Silver Mining's country manager, Dr. Castulo Molina Sotelo, commented: "I am very pleased to join the GR Silver Mining team and excited about the opportunity to contribute to the successful advancement and development of the company's projects in Mexico. I look forward to working closely with the team to build upon GR Silver Mining's strong technical foundation and create long-term value for our stakeholders."

About the Plomosas project

The Plomosas project, including the recent high-grade silver discovery in the San Marcial SE area, is progressing in 2025 as an emerging high-grade silver district located in southwestern edge of the Sierra Madre occidental, Sinaloa, Mexico. The Plomosas project, covering 7,823 hectares, including the historical Plomosas underground mine. Benefits from mine infrastructure, road access and existing permits associated with past-producing mining sites. The district contains intermediate to low-sulphidation epithermal silver and gold mineralization, hosted in hydrothermal breccias and veins. Recent success in exploration and drilling has delineated wide, high-grade, shallow hydrothermal breccias in the San Marcial area, including the SE area discovery, where stepout drilling is under way in 2025, aiming for continuous resource growth. At the historical Plomosas mine, where Grupo Mexico operated the underground mine from 1985 to 2000, exploration, underground sampling and metallurgical programs are being conducted to support future decisions regarding the implementation of a bulk sampling test mining program

About GR Silver Mining Ltd.

GR Silver Mining is a Canadian-based, Mexico-focused mineral exploration company engaged in cost-effective silver-gold resource expansion on its 100-per-cent-owned assets, located on the eastern edge of the Rosario mining district, in the southeast of Sinaloa state, Mexico. GR Silver Mining controls 100 per cent of the Plomosas project, including the former Plomosas underground mine and wide, high-grade silver mineralized zones at the San Marcial area. Recent discoveries in the 78 square kilometres of highly prospective, advanced-stage exploration concessions position the company well for resource expansion at the Plomosas project.

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