Sunshine Silver Mining & Refining, Inc. (Ticker: SSMR US) is an American development-stage mining company focused on restarting the historic Sunshine Mine and related refining facilities in Kellogg, Idaho. The company owns a historically producing silver mine whose byproducts include antimony, copper and lead, and owns or leases land in the Sunshine Mine Core Area, the Coeur d’Alene Mining District and the Lakeview Mining District.

Sunshine Silver Mining & Refining plans to list on the NYSE on June 4, 2026, offering 20.0 million shares at $13.50 to $16.50 per share, raising approximately $300 million at the midpoint. The company is incorporated in Delaware and has an estimated market capitalization of approximately $2.1 billion.

Founded in 2010, Sunshine Silver Mining & Refining acquired the Sunshine Mine that year and has not yet generated operating revenue. The company is maintaining and modernizing the site as it prepares for a targeted 2028 restart of mining, milling and refining operations. Morgan Stanley, Scotia Capital, BMO Capital Markets, Canaccord Genuity, Citigroup and RBC Capital Markets are joint bookrunners.