Rio Grande was incorporated in July 2024 and began trading on January 31, 2025, after Foremost Clean Energy Ltd. spun the Winston gold and silver property out through a Plan of Arrangement. Foremost shareholders received two Rio Grande shares for every Foremost share they held, and Foremost itself retained roughly 19.95% of the new company, making it the largest single shareholder at the time. Rio Grande has operated as a standalone issuer since.
