USG Corporation, through its subsidiaries, engages in the manufacture and distribution of building materials worldwide. The company manufactures and markets gypsum and related products, including gypsum wallboard, lines of joint compounds used for finishing wallboard joints, lines of cement board and accessories, lines of gypsum fiber panels, lines of poured gypsum underlayments, and various construction plaster products in the United States, Canada, and Mexico. Its gypsum products are used in various building applications to finish the interior walls, ceilings, and floors in residential, commercial, and institutional construction, as well as in certain industrial applications. The company also produces gypsum-based products for agricultural and industrial customers to use in various applications, including soil conditioning, road repair, fireproofing, and ceramics. USG Corporation distributes its gypsum products through its own locations, specialty wallboard distributors, building materials dealers, home improvement centers and other retailers, and contractors. In addition, the company manufactures and markets interior systems products, including ceiling tiles and ceiling grids that are primarily used in commercial applications. It markets its ceiling products in the United States, Canada, Mexico, Europe, Latin America, and the Asia-Pacific region through a network of distributors, installation contractors, supply locations, and home improvement centers. Further, USG Corporation distributes other manufacturers’ gypsum wallboard, joint compound and other gypsum products, drywall metal, insulation, roofing products, and accessories. The company was founded in 1901 and is based in Chicago, Illinois.