LyondellBasell Industries N.V. is an American multinational chemical company incorporated in the Netherlands with U.S. operations headquartered in Houston, Texas, and offices in London, UK. The company is the largest licensor of polyethylene and polypropylene technologies. It also produces ethylene, propylene, polyolefins, and oxyfuels. LyondellBasell was formed in December 2007 by the acquisition of Lyondell Chemical Company by Basell Polyolefins for $12.7 billion. As of 2016, Lyondell was the third largest independent chemical manufacturer in the United States. Wikipedia