EXHIBIT 21
SUBSIDIARIES OF WESTLAKE CORPORATION *
Name of Subsidiary | State or Other Jurisdiction of Incorporation or Organization | Names Doing Business | ||||||||||||
Eagle Spinco Inc. | Delaware | Eagle Spinco Inc. | ||||||||||||
Rome Delaware Corp. | Delaware | Rome Delaware Corp. | ||||||||||||
Taiwan Chlorine Industries Ltd. | Kaohsiung, Taiwan | Taiwan Chlorine Industries Ltd. | ||||||||||||
Vinnolit Monomer Geschäftsführungs GmbH | Ismaning, Germany | Vinnolit Monomer Geschäftsführungs GmbH | ||||||||||||
Westlake Canada Inc. | Toronto, Canada | Westlake Pipe & Fittings, Westlake Royal Building Products, Royal Building | ||||||||||||
Westlake Chemical Canada Inc. | Montreal, Canada | Westlake Chemical Canada 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 | ||||||||||||
Westlake Chemicals & Vinyls LLC | Delaware | Westlake Chemicals & Vinyls LLC | ||||||||||||
Westlake Compounds LLC | Delaware | Westlake Compounds LLC | ||||||||||||
Westlake DaVinci Roofscapes, L.L.C. | Delaware | Westlake DaVinci Roofscapes, L.L.C. | ||||||||||||
Westlake Dimex LLC | Delaware | Westlake Dimex LLC | ||||||||||||
Westlake Epoxy B.V. | Rotterdam, The Netherlands | Westlake Epoxy B.V. | ||||||||||||
Westlake Epoxy GmbH | Duisburg, Germany | Westlake Epoxy GmbH | ||||||||||||
Westlake Epoxy Inc. | Delaware | Westlake Epoxy Inc. | ||||||||||||
Westlake Germany GmbH & Co. KG | Ismaning, Germany | Westlake Germany GmbH & Co. KG | ||||||||||||
Westlake International I B.V. | Rotterdam, The Netherlands | Westlake International I B.V. | ||||||||||||
Westlake Longview Corporation | Delaware | Westlake Longview Corporation | ||||||||||||
Westlake Management (Shanghai) Co., Ltd. | Shanghai, China | Westlake Management (Shanghai) Co., Ltd. | ||||||||||||
Westlake Management Services, Inc. | Delaware | Westlake Management Services, Inc. | ||||||||||||
Westlake Natrium LLC | Delaware | Westlake Eagle Natrium LLC | ||||||||||||
Westlake Petrochemicals LLC | Delaware | Westlake Petrochemicals LLC | ||||||||||||
Westlake Pipe & Fittings Corporation | Delaware | Westlake Pipe and Fittings Corporation | ||||||||||||
Westlake Polymers LLC | Delaware | Westlake Polymers LLC | ||||||||||||
Westlake Royal Building Products (USA) Inc. | Delaware | Westlake Royal Building Products (USA) Inc. | ||||||||||||
Westlake Royal Building Products Inc. | Delaware | Westlake Royal Building Products Inc. | ||||||||||||
Westlake Royal Roofing LLC | Delaware | Westlake Royal Roofing LLC | ||||||||||||
Westlake Royal Stone LLC | Delaware | Westlake Royal Stone LLC | ||||||||||||
Westlake Royal Windows LLC | Delaware | Westlake Royal Windows LLC | ||||||||||||
Westlake Styrene LLC | Delaware | Westlake Styrene LLC | ||||||||||||
Westlake Switzerland GmbH | Baas, Switzerland | Westlake Switzerland GmbH | ||||||||||||
Westlake US 2 LLC | Delaware | Westlake US 2 LLC |
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Westlake Vinnolit Benelux-France B.V. | Dendermonde, Belgium | Westlake Vinnolit Benelux-France B.V. | ||||||||||||
Westlake Vinnolit GmbH & Co. KG | Ismaning, Germany | Westlake Vinnolit GmbH & Co. KG | ||||||||||||
Westlake Vinnolit Holdings GmbH | Ismaning, Germany | Westlake Vinnolit Holdings GmbH | ||||||||||||
Westlake Vinnolit Italia S.r.L. | Milan, Italy | Westlake Vinnolit Italia S.r.L. | ||||||||||||
Westlake Vinnolit Limited | Runcorn, United Kingdom | Westlake Vinnolit Limited | ||||||||||||
Westlake Vinnolit Treuhand GmbH | Ismaning, Germany | Westlake Vinnolit Treuhand GmbH | ||||||||||||
Westlake Vinyls Company LP | Delaware | Westlake Vinyls Company LP | ||||||||||||
Westlake Vinyls, Inc. | Delaware | Westlake Vinyls, Inc. | ||||||||||||
WPT LLC | Delaware | WPT LLC | ||||||||||||
______________________________
* 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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