LyondellBasell Announces Sale of Argentina-based Petroken By: Benzinga via Benzinga August 18, 2015 at 09:00 AM EDT LyondellBasell (NYSE: LYB), one of the world's largest plastics, chemical and refining companies, today announced that YPF S.A. and ... Read More >> Related Stocks: LyondellBasell Industries Macy's