Westlake Chemical Corporation is a vertically integrated manufacturer and marketer of basic chemicals, vinyls, polymers and fabricated building products. The Company’s products include a range of chemicals used in the world, which are fundamental to many diverse consumer and industrial markets, including flexible and rigid packaging, automotive products, coatings, residential and commercial construction, as well as other durable and non-durable goods. The Company operates in two principal operating segments, Olefins and Vinyls. The Company is an integrated producer of vinyls with substantial downstream integration into polyvinyl chloride (PVC) building products. The Olefins segment manufactures a range of petrochemical products. The Vinyls segment primarily offers PVC, vinyl chloride monomer (VCM), ethylene dichloride (EDC), chlorine, caustic soda and, through Westlake Chemical OpCo LP, ethylene.