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 company is engaged in bauxite mining operations, processes bauxite into alumina, and sells bauxite to customers who process it into industrial chemical products. Alcoa is also involved in the aluminum smelting, casting, and rolling, and the production of aluminum sheets.