The following companies are subsidiares of Westlake: Axiall Canada Inc., Axiall Corporation, Axiall Holdco Inc., Axiall LLC, Axiall Limited Partnership, Axiall Noteco Inc., Axiall Taiwan Ltd., CertainTeed Corporation, Eagle Natrium LLC, Eagle Spinco Inc., Eagle US 2 LLC, Lagoon LLC, Nakan, North American Pipe Corporation, North American Specialty Products LLC, Plastic Trends Inc., Rome Acquisition Holding Corp., Rome Delaware Corp., Royal Building Products (USA) Inc., Royal Group Inc., Taiwan Chlorine Industries Ltd., Vinnolit Benelux-France B.V.B.A., Vinnolit GmbH & Co. KG, Vinnolit Holdings, Vinnolit Holdings GmbH, Vinnolit Italia S.r.L., Vinnolit Limited, Vinnolit Monomer Geschäftsführungs GmbH, Vinnolit Schkopau GmbH, Vinnolit Treuhand GmbH, WPT LLC, Westlake Chemical Finance Corporation, Westlake Chemical Investments Inc., Westlake Chemical OpCo LP, Westlake Chemical Partners GP LLC, Westlake Chemical Partners LP, Westlake Compounds LLC, Westlake Development Corporation, Westlake International Holdings Cooperatief U.A., Westlake International Holdings II C.V., Westlake International I B.V., Westlake Longview Corporation, Westlake Management Services Inc., Westlake Olefins LLC, Westlake Petrochemicals LLC, Westlake Polymers LLC, Westlake Styrene LLC, Westlake Switzerland GmbH, Westlake Vinyl Corporation, Westlake Vinyls Company LP, and Westlake Vinyls Inc..
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