EX-21 6 exhibit2112312310-k.htm EX-21 Document

EXHIBIT 21
SUBSIDIARIES OF WESTLAKE CORPORATION *
   Name of SubsidiaryState or Other Jurisdiction
of Incorporation or
Organization		   Names Doing Business
Eagle Spinco Inc.DelawareEagle Spinco Inc.
Rome Delaware Corp.DelawareRome Delaware Corp.
Taiwan Chlorine Industries Ltd.Kaohsiung, TaiwanTaiwan Chlorine Industries Ltd.
Vinnolit Monomer Geschäftsführungs GmbHIsmaning, GermanyVinnolit Monomer Geschäftsführungs GmbH
Westlake Canada Inc.
Toronto, CanadaWestlake Pipe & Fittings, Westlake Royal Building Products, Royal Building
Westlake Chemical Canada Inc.Montreal, CanadaWestlake Chemical Canada Inc.
Westlake Chemical OpCo LPDelawareWestlake Chemical OpCo LP
Westlake Chemical Partners GP LLCDelawareWestlake Chemical Partners GP LLC
Westlake Chemical Partners LPDelawareWestlake Chemical Partners LP
Westlake Chemicals & Vinyls LLCDelawareWestlake Chemicals & Vinyls LLC
Westlake Compounds LLCDelawareWestlake Compounds LLC
Westlake DaVinci Roofscapes, L.L.C.DelawareWestlake DaVinci Roofscapes, L.L.C.
Westlake Dimex LLCDelawareWestlake Dimex LLC
Westlake Epoxy B.V.Rotterdam, The NetherlandsWestlake Epoxy B.V.
Westlake Epoxy GmbHDuisburg, GermanyWestlake Epoxy GmbH
Westlake Epoxy Inc.DelawareWestlake Epoxy Inc.
Westlake Germany GmbH & Co. KGIsmaning, GermanyWestlake Germany GmbH & Co. KG
Westlake International I B.V.Rotterdam, The NetherlandsWestlake International I B.V.
Westlake Longview CorporationDelawareWestlake Longview Corporation
Westlake Management 
(Shanghai) Co., Ltd.
Shanghai, China
Westlake Management 
(Shanghai) Co., Ltd.
Westlake Management Services, Inc.DelawareWestlake Management Services, Inc.
Westlake Natrium LLCDelawareWestlake Eagle Natrium LLC
Westlake Petrochemicals LLCDelawareWestlake Petrochemicals LLC
Westlake Pipe & Fittings Corporation
DelawareWestlake Pipe and Fittings Corporation
Westlake Polymers LLCDelawareWestlake Polymers LLC
Westlake Royal Building Products (USA) Inc.DelawareWestlake 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 LLCDelawareWestlake Styrene LLC
Westlake Switzerland GmbHBaas, SwitzerlandWestlake Switzerland GmbH
Westlake US 2 LLCDelawareWestlake US 2 LLC
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Westlake Vinnolit Benelux-France B.V.Dendermonde, BelgiumWestlake Vinnolit Benelux-France B.V.
Westlake Vinnolit GmbH & Co. KGIsmaning, GermanyWestlake Vinnolit GmbH & Co. KG
Westlake Vinnolit Holdings GmbHIsmaning, GermanyWestlake Vinnolit Holdings GmbH
Westlake Vinnolit Italia S.r.L.Milan, ItalyWestlake Vinnolit Italia S.r.L.
Westlake Vinnolit LimitedRuncorn, United KingdomWestlake Vinnolit Limited
Westlake Vinnolit Treuhand GmbHIsmaning, GermanyWestlake Vinnolit Treuhand GmbH
Westlake Vinyls Company LPDelawareWestlake Vinyls Company LP
Westlake Vinyls, Inc.DelawareWestlake Vinyls, Inc.
WPT LLCDelawareWPT 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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