Osiris One Metals to Acquire 80% Interest in "Western Range" Silver Copper Project in Western Australia

About this update from Osiris One Metals Ltd.

Vancouver, British Columbia--(Newsfile Corp. - June 1, 2026) - Osiris One Metals Ltd (TSXV: OSM) (FSE: JI8) ("Osiris" or the "Company") is pleased to announce that it has entered into an agreement dated 30 May 2026 with Standard American Metals LLC to acquire an 80% interest in the Western Range Silver Copper Project ("Western Range") in Western Australia. Western Range comprises three tenements covering more than 19,000 hectares north of Meekatharra in Western Australia. The Project is located in a proven mining region near the Abra Mine, one of Australia's major silver lead operations. Abra reported December 2025 quarter production of 253,000 ounces of silver and 19,756 tonnes of lead, highlighting the scale of mineral systems present in the district. Western Range gives Osiris exposure to a large, underexplored land package with multiple historical targets generated by both BHP and Rio Tinto in the 1990s. Western Range was originally targetted by BHP and Rio Tinto during 1990s exploration and benefits from a large historical dataset covering magnetics, gravity and electromagnetic surveys. Despite this major company groundwork, several named targets, including Edge 12A, BGA005 and Collie 42, remain largely untested, as both companies shifted away from exploration work in Australia. Giving Osiris a ready made pipeline of priority targets, with the opportunity to apply modern review, verification and drilling to work that was never fully followed up. Upon Closing, Osiris will assume operational control of the Project and gain access to the associated historical exploration database, positioning the Company to rapidly undertake data review, field verification, target ranking and drill planning. Sreenath Didugu, CEO of Osiris One Metals, commented: "Western Range provides Osiris with a defined pipeline of priority exploration targets, supported by historical geophysical work and limited modern follow up. "With clear avenues for value creation, several defined and underexplored targets, and a significant geological record in a well understood mining region, the Western Range acquisition builds on the corporate restructuring conducted by management and marks Osiris entrance into its next phase of growth. "We are excited to advance this project, starting with modern verification of historic targets and moving toward a concise confirmation program." About ...

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