TWIN METALS MINNESOTA LLC is a Minnesota mining company focused on designing, constructing and operating an underground copper, nickel, platinum, palladium, gold and silver mining project in the Iron Range region of northeast Minnesota. The Twin Metals Minnesota Project (TMM Project) brings the promise of significant long-term jobs and environmentally responsible economic development for generations in Minnesota.

Twin Metals Minnesota is a subsidiary of Antofagasta plc of Santiago, Chile, one of the top 10 copper producers in the world. Twin Metals Minnesota maintains offices in Ely and St. Paul, Minnesota.