EX-21 76 h08423exv21.txt SUBSIDIARIES OF THE REGISTRANT . . . EXHIBIT 21 WESTLAKE CHEMICAL CORPORATION SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Geismar Holdings, Inc. Delaware Geismar Vinyls Company LP Delaware Gramercy Chlor-Alkali Corporation Delaware GVGP, Inc. Delaware North American Pipe Corporation Delaware North American Profiles, Inc. Delaware North American Profiles Limited Canada Van Buren Pipe Corporation Delaware Westech Building Products, Inc. Delaware Westlake AR Corporation Delaware Westlake Chemical Holdings, Inc. Delaware Westlake Chemical Investments, Inc. Delaware Westlake Chemical Manufacturing, Inc. Delaware Westlake Chemical Products, Inc. Delaware Westlake Development Corporation Delaware Westlake International Investments Corporation British Virgin Islands Westlake Management Services, Inc. Delaware Westlake Olefins Corporation Delaware Westlake Overseas Corporation U.S. Virgin Islands Westlake Petrochemicals LP Delaware Westlake Polymers LP Delaware Westlake Profiles Limited Canada Westlake PVC Corporation Delaware Westlake Resources Corporation Delaware Westlake Styrene LP Delaware Westlake Vinyl Corporation Delaware Westlake Vinyls, Inc. Delaware WPT LP Delaware
GEISMAR HOLDINGS, INC. GVGP, INC. SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Geismar Vinyls Company LP Delaware
NORTH AMERICAN PIPE CORPORATION SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION North American Profiles, Inc. Delaware Van Buren Pipe Corporation Delaware Westech Building Products, Inc. Delaware
WESTLAKE CHEMICAL HOLDINGS, INC. WESTLAKE CHEMICAL MANUFACTURING, INC. SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Westlake Styrene LP Delaware WPT LP Delaware
WESTLAKE CHEMICAL INVESTMENTS, INC. WESTLAKE CHEMICAL PRODUCTS, INC. SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Westlake Petrochemicals LP Delaware Westlake Polymers LP Delaware Westlake Overseas Corporation U.S. Virgin Islands
WESTLAKE MANAGEMENT SERVICES, INC. SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Westlake AR Corporation Delaware
WESTLAKE OLEFINS CORPORATION SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Westlake AR Corporation Delaware Westlake Chemical Investments, Inc. Delaware Westlake Chemical Products, Inc. Delaware Westlake International Investments Corporation British Virgin Islands Westlake Management Services, Inc. Delaware Westlake Overseas Corporation U.S. Virgin Islands Westlake Petrochemicals LP Delaware Westlake Polymers LP Delaware Westlake Resources Corporation Delaware
WESTLAKE POLYMERS LP SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Westlake Overseas Corporation U.S. Virgin Islands
WESTLAKE VINYL CORPORATION SUBSIDIARIES
JURISDICTION OF INCORPORATION COMPANY OR ORGANIZATION Geismar Holdings, Inc. Delaware Geismar Vinyls Company LP Delaware GVGP, Inc. Delaware Westlake PVC Corporation Delaware Westlake Vinyls, Inc. Delaware