Exhibit 21
Subsidiaries of Westlake Chemical Corporation
Westlake Profiles Limited
Westech Building Products Limited
Westlake NG I Corporation
Westlake NG II Corporation
Westlake International Corporation
Westlake Olefins Corporation
Westlake Chemical Holdings, Inc.
Westlake Chemical Manufacturing, Inc.
Westlake Development Corporation
Westlake Vinyl Corporation
North American Pipe Corporation
Westlake Styrene LP
WPT LP
Westlake Vinyls, Inc.
Westlake PVC Corporation
GVGP, Inc.
Geismar Holdings, Inc.
Westlake Vinyls Company LP
Westlake International Investments Corporation
Westlake Chemical Investments, Inc.
Westlake Chemical Products, Inc.
Westlake Resources Corporation
Westlake Management Services, Inc.
Westlake International Services Corporation
Westlake Polymers LP
Westlake Petrochemicals LP
Westech Profiles Limited
Westech Building Products, Inc.
Van Buren Pipe Corporation
North American Bristol Corporation