EX-21 5 exhibit2112312010-k.htm EX-21
EXHIBIT 21
SUBSIDIARIES OF WESTLAKE *

Name of Subsidiary |  | State or Other Jurisdiction of Incorporation or Organization |  | Names Doing Business
Axiall Canada, Inc. |  | Canada |  | Axiall Canada, Inc.
Axiall Corporation |  | Delaware |  | Axiall Corporation
Axiall Holdco, Inc. |  | Delaware |  | Axiall Holdco, Inc.
Axiall Limited Partnership |  | Ontario |  | Axiall Limited Partnership
Axiall Noteco, Inc. |  | Delaware |  | Axiall Noteco, Inc.
Axiall Taiwan Ltd. |  | Taiwan |  | Axiall Taiwan Ltd.
Axiall, LLC |  | Delaware |  | Axiall, LLC
DaVinci Roofscapes, L.L.C. |  | Kansas |  | DaVinci Roofscapes, L.L.C.
Eagle Natrium LLC |  | Delaware |  | Eagle Natrium LLC
Eagle Spinco Inc. |  | Delaware |  | Eagle Spinco Inc.
Eagle US 2 LLC |  | Delaware |  | Eagle US 2 LLC
North American Pipe Corporation |  | Delaware |  | North American Pipe Corporation and NAPCO
North American Specialty Products LLC |  | Delaware |  | North American Specialty Products LLC
Plastic Trends, Inc. |  | Michigan |  | Plastic Trends, Inc.
Rome Acquisition Holding Corp. |  | Nova Scotia |  | Rome Acquisition Holding Corp.
Rome Delaware Corp. |  | Delaware |  | Rome Delaware Corp.
Royal Building Products (USA) Inc. |  | Delaware |  | Royal Building Products (USA) Inc.
Royal Group, Inc./Groupe Royal, Inc. |  | Canada |  | Royal Group, Inc., Groupe Royal, Inc. Produits de Bâtiment Royal, Royal Building Products, Royal Building Solutions, Roytec Vinyl and NAPCO Royal Pipe & Fittings
Taiwan Chlorine Industries Ltd. |  | Taiwan |  | Taiwan Chlorine Industries Ltd.
Vinnolit Benelux-France B.V.B.A. |  | Dendermonde, Belgium |  | Vinnolit Benelux-France B.V.B.A.
Vinnolit GmbH & Co. KG |  | Ismaning, Germany |  | Vinnolit GmbH & Co. KG
Vinnolit Holdings GmbH |  | Ismaning, Germany |  | Vinnolit Holdings GmbH
Vinnolit Italia S.r.L. |  | Milan, Italy |  | Vinnolit Italia S.r.L.
Vinnolit Limited |  | United Kingdom |  | Vinnolit Limited
Vinnolit Monomer Geschäftsführungs GmbH |  | Ismaning, Germany |  | Vinnolit Monomer Geschäftsführungs GmbH
Vinnolit Treuhand GmbH |  | Ismaning, Germany |  | Vinnolit Treuhand GmbH
Westlake Chemical Finance Corporation |  | Delaware |  | Westlake Chemical Finance Corporation
Westlake Chemical Investments, Inc. |  | Delaware |  | Westlake Chemical Investments, Inc.
Westlake Chemical OpCo LP |  | Delaware |  | Westlake Chemical OpCo LP
Westlake Chemical Partners GP LLC |  | Delaware |  | Westlake Chemical Partners GP LLC
Westlake Chemical Partners LP |  | Delaware |  | Westlake Chemical Partners LP

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Westlake Compounds LLC |  | Delaware |  | Westlake Compounds LLC
Westlake Development Corporation |  | Delaware |  | Westlake Development Corporation
Westlake Germany GmbH & Co. KG |  | Germany |  | Westlake Germany GmbH & Co. KG
Westlake International Holdings Cooperatief U.A. |  | The Netherlands |  | Westlake International Holdings Cooperatief U.A.
Westlake International Holdings II C.V. |  | The Netherlands |  | Westlake International Holdings II C.V.
Westlake International I B.V. |  | The Netherlands |  | Westlake International I B.V.
Westlake International Services Corporation |  | Delaware |  | Westlake International Services Corporation
Westlake Longview Corporation |  | Delaware |  | Westlake Longview Corporation
Westlake Management Services, Inc. |  | Delaware |  | Westlake Management Services, Inc.
Westlake Olefins LLC |  | Delaware |  | Westlake Olefins LLC
Westlake Petrochemicals LLC |  | Delaware |  | Westlake Petrochemicals LLC
Westlake Polymers LLC |  | Delaware |  | Westlake Polymers LLC
Westlake Styrene LLC |  | Delaware |  | Westlake Styrene LLC
Westlake Switzerland GmbH |  | Switzerland |  | Westlake Switzerland GmbH
Westlake Vinyls Company LP |  | Delaware |  | Westlake Vinyls Company LP
Westlake Vinyl Corporation |  | Delaware |  | Westlake Vinyl Corporation
Westlake Vinyls, Inc. |  | Delaware |  | Westlake Vinyls, Inc.
WPT LLC |  | Delaware |  | WPT LLC

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* Westlake has elected to omit the names of certain subsidiaries. None of the omitted subsidiaries, considered either alone or together with the other omitted subsidiaries of its immediate parent, constitutes a “Significant Subsidiary” as set forth in Section 601(b)(21) of Regulation S-K.
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