Global Brass and Copper Holdings, Inc. converts, fabricates, processes, and distributes specialized non-ferrous products in the United States, the Asia Pacific, and Mexico. It operates in three segments: Olin Brass, Chase Brass, and A.J. Oster. The Olin Brass segment manufactures, fabricates, and converts specialized copper and brass sheets, strips, foils, tubes, and fabricated products; and rerolls and forms other alloys, such as stainless steel, carbon steel, and aluminum. The Chase Brass segment manufactures and supplies brass rods in round, hexagonal, and other shapes. The A.J. Oster segment processes and distributes copper, brass, and aluminum sheets, strips, and coated products. The company sells its products to the building and housing, automotive, electronics/electrical components, munitions, coinage, transportation, and industrial machinery and equipment markets under the Olin Brass, Chase Brass, A.J. Oster, Green Dot, and Eco Brass brands through its direct mill sales, distribution network, and third-party distributors. Global Brass and Copper Holdings, Inc. was founded in 2007 and is headquartered in Schaumburg, Illinois. As of July 12, 2019, Global Brass and Copper Holdings, Inc. operates as a subsidiary of Wieland-Werke AG.