Asarco is primarily engaged in copper production, but also produces specialty chemicals and aggregates. The Company's copper business includes integrated mining, smelting and refining operations in North America and in Peru through its 54.3% owned
With its divisions Plansee High Performance Materials and Global Tungsten & Powders (both 100 percent ownership), the joint venture Ceratizit (50 percent) and its holding in Molymet (21.1 percent), the Plansee Group is one of the world`s leading powder metallurgical industrial groups. The Plansee Group specializes in molybdenum and tungsten materials, covering the entire value-added chain—from the ore concentrate to customized tools and components. The Plansee Group`s portfolio includes more than 75,000 different products and tools, which are used in the production of everyday high-tech devices such as smartphones and tablets as well as sustainable and efficient solutions related to mobility, energy supply and industrial manufacturing.
Bruening Rock Products is a Decorah, IA-based company in the Agriculture and Mining sector.
Morton Industrial Group Inc is a Morton, IL-based company in the Agriculture and Mining sector.
Vetter Stone Co is a Mankato, MN-based company in the Agriculture and Mining sector.