2009
- Acquired Janesville, Wisconsin PVC pipe plant and started-up PVC plant in Yucca, Arizona
2008
- Expanded Calvert City, Kentucky PVC and Chlor-alkali plants
- Expanded Styrene plant in Lake Charles, Louisiana
2006
- Assumed majority ownership of Suzhou Huasu Plastics in Suzhou, China
- Celebrated 20 year anniversary
- Acquired Eastman's Polyethylene Business in Longview, Texas
2004
- Acquired PVC plant in Greensboro, Georgia
- Initial Public Offering (IPO) and listing WLK on the NSYE
2002
- Acquired PVC and VCM plants in Geismar, Louisiana
- Started-up Chlorine expansion in Calvert City, Kentucky
2001
- Expanded and upgraded PVC plant in Booneville, Mississippi
