LyondellBasell Industries (nyse|LYB) is a public multinational chemical company based in Rotterdam, Netherlands. It was formed in December 2007 by the acquisition of Lyondell Chemical Company by Basell Polyolefins for $12.7 billion. LyondellBasell was listed on the New York Stock Exchange on October 14, 2010 (nyse|LYB and nyse|LYB.B). Lyondell was delisted from the New York Stock Exchange (formerly nyse|LYO) after the acquisition. LyondellBasell is headquartered in Rotterdam, Netherlands, and has its corporate center at LyondellBasell Tower in Houston, Texas.  Wikipedia