Alcoa (formerly known as Alcoa Upstream) is a company that produces and sells bauxite, alumina, and aluminum products. It operates through two segments: Alumina and Aluminum. The Alumina segment specializes in the mining of bauxite and other aluminous ores and the refining, production, and sale of smelter-grade and non-metallurgical alumina. The Aluminum segment focuses on aluminum smelting and casting, as well as energy production operations.