LyondellBasell Completes Acquisition of A. Schulman, Inc. Company announces new Advanced Polymer Solutions business segment PR Newswire HOUSTON and LONDON, Aug. 21, 2018 HOUSTON and LONDON , Aug. 21, 2018 /PRNewswire/ -- LyondellBasell (NYSE: LYB), one of the largest plastics, chemicals and refining companies in the world, today announced it has completed the acquisition of A. Schulman, Inc., a leading global supplier of high-performance plastic compounds, composites and powders. "This...