MANAGEMENT

Directors and Executive Officers

      The following table sets forth the names and positions of our directors and executive officers and their ages as of May 1, 2004:

      T.T. Chao. Mr. Chao has been our Chairman of the Board since 1985 and has over 50 years of international experience in the chemical industry. He is the founder of China General Plastics Group (Taiwan) and was Chairman of Titan Group (Malaysia) until June 2003, when he became Chairman Emeritus and Founder. Mr. Chao is the father of James Chao, our Vice Chairman of the Board, Albert Chao, our Chief Executive Officer and President, and Dorothy C. Jenkins, a director, and the husband of Wei Fong Chao, a director.

      James Chao. Mr. Chao has been our Vice Chairman of the Board since May 1996 and became a director in June 2003. Mr. Chao also has responsibility for the oversight of our Vinyls business. Mr. Chao has over 30 years of international experience in the chemical industry. In June 2003, he was named Chairman of Titan Group and previously served as the Managing Director. He has served as a Special Assistant to the Chairman of China General Plastics Group and worked in various financial, managerial and technical positions at Mattel Incorporated, Developmental Bank of Singapore, Singapore Gulf Plastics Pte. Ltd. and Gulf Oil Corporation. Mr. Chao, along with his brother Albert Chao, assisted T.T. Chao in founding Westlake Group and served as Westlake’s first president from 1985 to 1996. Mr. Chao received his Bachelor of Science degree from the Massachusetts Institute of Technology and an M.B.A. from Columbia University.

      Albert Chao. Mr. Chao has been our President since May 1996 and a director since June 2003. Mr. Chao has over 30 years of international experience in the chemical industry. In 1985, Mr. Chao assisted T.T. Chao and James Chao in founding Westlake, where he served as Executive Vice President until he succeeded his brother James as President. He has held positions in the Controller’s Group of Mobil Oil Corporation, in the Technical Department of Hercules Incorporated, in the Plastics Group of Gulf Oil Corporation and has served as Assistant to the Chairman of China General Plastics Group and Deputy Managing Director of a plastics fabrication business in Singapore. He is also a director of Titan

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      Dorothy C. Jenkins. Ms. Jenkins has been a director since June 2003. Ms. Jenkins is a director of A-Group Holdings, an affiliate of ours. For the past five years, Ms. Jenkins has managed her personal investments. She is also a member of the boards of various civic and charitable organizations including Polk Museum of Art and the John and Mable Ringling Museum of Art Foundation, Inc. Ms. Jenkins is the sister of James Chao and Albert Chao, and the daughter of T.T. Chao and Wei Fong Chao. She is a graduate of Wellesley College and holds a B.S. in Mathematics with additional graduate studies in mathematics at the University of South Florida.

      Wei Fong Chao. Mrs. Chao has been a director since December 2003. Mrs. Chao is also the Chairman of A-Group Holdings, an affiliate of ours. For the past five years, Mrs. Chao has managed her personal investments. She is the wife of our Chairman, Mr. T.T. Chao, and the mother of James Chao, Albert Chao and Dorothy Jenkins.

      Ruth I. Dreessen. Ms. Dreessen has been our Senior Vice President and Chief Financial Officer since June 2003. She was employed by JPMorgan Chase & Company for 21 years where she last served as Managing Director of the Global Chemicals Group. She was formerly a member of the board of Georgia Gulf Corporation and is currently a member of the board of Better Minerals & Aggregates Corporation. She received her undergraduate degree from New College of Florida and a Masters in International Affairs from Columbia University.

      David R. Hansen. Mr. Hansen has been our Senior Vice President, Administration, since September 1999 and served as Vice President, Human Resources from 1993 to 1999. In August 2003 he was elected to the additional office of Secretary of the corporation. Prior to joining Westlake in 1990, Mr. Hansen served as Director of Human Resources & Administration for Agrico Chemical Company and held various human resources and administrative management positions within the Williams Companies. He has over 28 years of administrative management experience in the oil, gas, energy, chemicals, pipeline, plastics and computer industries. He received his Bachelor of Science degree in Social Science from the University of Utah and has completed extensive graduate work toward an M.S. in Human Resources Management.

      Wayne D. Morse. Mr. Morse has been a Senior Vice President since 1994 and was most recently named Senior Vice President, Vinyls and Manufacturing in January 2003. Mr. Morse joined Westlake in 1990 after 23 years of service with Goodrich Corporation. He held the position of Vice President and General Manager of BFG Intermediates Division, which had ethylene, chlor-alkali and EDC/ VCM operations. Since joining Westlake, Mr. Morse has had broad executive responsibility for all chemical operations and is the senior manufacturing executive of our company. Mr. Morse earned a B.S. degree in Chemical Engineering from the University of Louisville.

      Tai-li Keng. Ms. Keng has been our Vice President and Treasurer since June 2003. She was appointed Treasurer in 2002 and previously served as Manager, Banking and Investments from 1996 to 2002. Ms. Keng joined Westlake in 1992 after nine years in commercial banking, where she last served as a Vice President of NationsBank and its predecessors. Ms. Keng is a graduate of the National Taiwan University and the State University of New York. She holds a Masters in International Management from the American Graduate School of International Management.

      George J. Mangieri. Mr. Mangieri has been our Vice President and Controller since joining us in April 2000. Prior to joining Westlake, Mr. Mangieri served as Vice President and Controller of Zurn Industries, Inc. from 1998 to 2000. He previously was employed as Vice President and Controller for Imo Industries, Inc. in New Jersey, and spent over 10 years in public accounting with Ernst & Young LLP, where he served as Senior Manager. He received his Bachelor of Science degree from Monmouth College and is a Certified Public Accountant.

      Jeffrey L. Taylor. Mr. Taylor has been our Vice President, Polyethylene, since January 2003. Mr. Taylor joined Westlake in March 2002 as Manager, PE Marketing. Mr. Taylor joined Westlake after a 25-year career with Chevron Phillips Chemical Company where he served as the Vice President,

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      Stephen Wallace. Mr. Wallace joined our company in December 2003 as our Vice President and General Counsel. He began his legal career over 20 years ago at the law firm of Baker Botts L.L.P., which he left as a partner in 1993. He subsequently held senior corporate legal positions with Transworld Oil U.S.A., Inc. (1993-1996; 2002-2003), Oman Oil Company Ltd. (1996-1997), and Enron Global Exploration & Production Inc. and its affiliates (1997-2002). Mr. Wallace holds a B.A. from Rice University and a Ph.D. from Cornell University in linguistics, and received his J.D. from the University of Houston.

      Warren W. Wilder. Mr. Wilder has been our Vice President, Olefins and Styrene, since January 2003. Mr. Wilder joined Westlake in January 2000 as Vice President, Planning and Business Development, and in February 2001, he was appointed Vice President, Polyethylene. Prior to joining Westlake, he was an executive with Koch Industries, Inc. for over 10 years where he held positions in planning and business development, finance, operations and general management, including Vice President, Koch Hydrocarbons from 1996 to 1999. Mr. Wilder holds a B.S. in Chemical Engineering from the University of Washington and an M.B.A. from the University of Chicago.