EX-21 2 exhibit2112311510-k.htm EXHIBIT 21 Exhibit


EXHIBIT 21
SUBSIDIARIES OF WESTLAKE *
   Name of Subsidiary
 
State or Other Jurisdiction
of Incorporation or
Organization
 
   Names Doing Business
 
 
 
 
 
North American Pipe Corporation
 
Delaware
 
North American Pipe Corporation
   and NAPCO
 
 
 
 
 
North American Specialty Products LLC
 
Delaware
 
North American Specialty Products LLC
 
 
 
 
 
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 Hillhouse Ltd.
 
Lancashire, England
 
Vinnolit Hillhouse Ltd.
 
 
 
 
 
Vinnolit Italia S.r.L.
 
Milan, Italy
 
Vinnolit Italia S.r.L.
 
 
 
 
 
Vinnolit Ltd.
 
United Kingdom
 
Vinnolit Ltd.
 
 
 
 
 
Vinnolit Schkopau GmbH
 
Ismaning, Germany
 
Vinnolit Schkopau GmbH
 
 
 
 
 
Westech Building Products, Inc.
 
Delaware
 
Westech Building Products, Inc.
 
 
 
 
 
Westech Building Products ULC
 
Canada
 
Westech Building Products ULC and
   Westech Building Products Limited
 
 
 
 
 
Westlake Chemical Finance Corporation
 
Delaware
 
Westlake Chemical Finance Corporation
 
 
 
 
 
Westlake Chemical OpCo LP
 
Delaware
 
Westlake Chemical OpCo LP
 
 
 
 
 
Westlake Chemical Partners LP
 
Delaware
 
Westlake Chemical Partners LP
 
 
 
 
 
Westlake Germany GmbH & Co. KG
 
Ismaning, Germany
 
Westlake Germany GmbH & Co. KG
 
 
 
 
 
Westlake Longview Corporation
 
Delaware
 
Westlake Longview Corporation
 
 
 
 
 
Westlake Management Services, Inc.
 
Delaware
 
Westlake Management Services, Inc.
 
 
 
 
 
Westlake Petrochemicals LLC
 
Delaware
 
Westlake Petrochemicals LLC,
   Westlake Petrochemicals LP and WPE
 
 
 
 
 
Westlake Polymers LLC
 
Delaware
 
Westlake Polymers LLC,
   Westlake Polymers LP and WPE
 
 
 
 
 
Westlake PVC Corporation
 
Delaware
 
Westlake PVC Corporation
 
 
 
 
 
Westlake Styrene LLC
 
Delaware
 
Westlake Styrene LLC and
   Westlake Styrene LP
 
 
 
 
 
Westlake Supply and Trading Company
 
Delaware
 
Westlake Supply and Trading Company
 
 
 
 
 
Westlake Vinyls Company LP
 
Delaware
 
Westlake Vinyls Company LP
 
 
 
 
 
Westlake Vinyls, Inc.
 
Delaware
 
Westlake Vinyls, Inc.,
   Westlake Monomers and WCAO
 
 
 
 
 
WPT LLC
 
Delaware
 
WPT LLC and WPT LP
 
 
 
 
 
Suzhou Huasu Plastics Co., Ltd.
 
People’s Republic of China
 
Suzhou Huasu Plastics Co., Ltd.
   and Huasu

______________________________
*
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.