西湖化工 WLK

Mr. Chao has been our Executive Chairman of the Board since July 2024 and a director since June 2003. From May 1996 to July 2024, Mr. Chao served as President and, from July 2004 to July 2024, he served as our Chief Executive Officer. In addition, Mr. Chao has been a director of Westlake Chemical Partners GP LLC since its formation in March 2014, its Executive Chairman of the Board since July 2024 and served as its President and Chief Executive Officer from March 2014 to July 2024. In 1985, Mr. Chao assisted his father, T.T. Chao, and his brother, James Y. Chao, in founding Westlake. 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.

Mr. Gilson has been our President and Chief Executive Officer since July 2024. Mr. Gilson has also served as President and Chief Executive Officer and a Director of Westlake Partners' general partner since July 2024. Prior to joining Westlake, Mr. Gilson served as President, Chief Executive Officer and Representative Director of Mitsubishi Chemical Group Corporation (formerly known as Mitsubishi Chemical Holdings Corporation), from April 2021 until April 2024. From September 2014 until December 2020, Mr. Gilson served as Chief Executive Officer of Roquette Freres. Before that, Mr. Gilson served as Vice-Chairman and Chief Operating Officer of NuSil Technology LLC. Earlier in his career, Mr. Gilson held various leadership roles at Dow Corning Corporation, including Executive Vice President, Specialty Chemicals Business, before becoming Chief Executive Officer of Avantor Performance Materials, Inc. Mr. Gilson holds a Master of Science in Chemical Engineering from the University of Liege in Belgium and an Executive Master of Business Administration from the International Institute for Management Development in Switzerland. On February 20, 2026, the Board of Directors of the Company elected Mr. Jean-Marc Gilson, the President and Chief Executive Officer of the Company, as member of the Board.

Mr. McCollum has been a director since May 2018. Mr. McCollum was the President and Chief Executive Officer of Weatherford International plc from April 2017 to June 2020. Weatherford filed for voluntary Chapter 11 bankruptcy in July 2019 and emerged in December 2019. Prior to joining Weatherford, Mr. McCollum served as Executive Vice President and Chief Financial Officer of Halliburton Company, a position he assumed in 2008 and resumed in July 2016 following an interim role from December 2014 to July 2016 as Executive Vice President and Chief Integration Officer during the pendency of Halliburton's proposed acquisition of Baker Hughes Incorporated. From 1995 to 2003, Mr. McCollum held a number of senior positions at Tenneco, Inc., including Chief Financial Officer, and, from 1991 to 1995, served as an Audit and Advisory Partner in Arthur Andersen's Energy Division, where he began his career. Mr. McCollum has served on the Board of Directors of Seadrill Limited since February 2022, the Board of Directors of Momentive Performance Materials, Inc. since December 2024 and the Board of Directors of ONEOK, Inc. since January 2026. He previously served on the Board of Directors of Marathon Oil Corporation from December 2022 until its acquisition by ConocoPhillips in November 2024 and the Board of Directors of Archrock, Inc. from 2002 to July 2018. He also currently serves on the Board of Trustees for Baylor College of Medicine, the Board of Directors for the Baylor St. Luke's Medical Center joint venture and the Board of Directors of Mentoring Alliance. Mr. McCollum received a bachelor's of Business Administration degree in Accounting from Baylor University in 1980 and is a CPA in Texas.

Mr. Graff has been a director since May 2013. Mr. Graff is the former Chairman and Chief Executive Officer of American Air Liquide, Inc. and former Executive Vice President of the Air Liquide Group. Mr. Graff joined Air Liquide as President and CEO of Air Liquide USA LLC in April 2007. In May 2009, Mr. Graff was named a Corporate Vice President of Air Liquide S.A. and a member of the Executive Committee of the Air Liquide Group with responsibilities for North America and Safety and Industrial Systems Worldwide. In September 2009, he took on additional responsibilities and was named President and CEO of American Air Liquide Holdings, Inc. In January 2010, Mr. Graff's responsibilities were expanded to include all of Air Liquide's operations in the Western hemisphere (Americas). In April 2012, Mr. Graff's responsibilities were expanded to include oversight of Air Liquide's electronic business worldwide and he was named Chairman of the Electronics World Business Line. In January 2013, Mr. Graff was named a Senior Vice Present of the Air Liquide Group and, in April 2013, he was named Chairman of American Air Liquide Holdings, Inc. In February 2017, Mr. Graff was named Executive Vice President of Air Liquide S.A., took on additional responsibilities for Air Liquide's operations in Asia and was named Chairman of Airgas Inc. In September 2022, Mr. Graff took on additional responsibilities as Chairman and CEO of Air Liquide's Global Engineering and Construction business. In September 2023, Mr. Graff stepped down as Chairman and CEO of American Air Liquide Holdings, Inc., continuing as Chairman and CEO of American Air Liquide. In July 2024, Mr. Graff stepped down from his roles as Chairman and CEO of American Air Liquide, as Executive Vice President of the Air Liquide Group and all other executive responsibilities. Mr. Graff retired from Air Liquide on January 1, 2025. Prior to joining Air Liquide, Mr. Graff began his career with Amoco Corporation and then worked for BP plc, where he last served as President and Chief Executive Officer of BP Polymers Americas from 2001 to 2004. Mr. Graff served as a director of The Lubrizol Corporation from 2009 until it was acquired by Berkshire Hathaway Inc. in 2011. Mr. Graff previously served as Vice Chairman and chair of the Executive Committee of the American Chemistry Council, a principal of the American Energy Innovation Council, a member of the National Petroleum Council and a member the United States Investment Advisory Council, chairing the Committee on Competitiveness for the U.S. Department of Commerce. He is a fellow at the Baker Institute's Center for Energy Studies at Rice University and serves on the Senior Director's Council. Mr. Graff also serves as Vice Chairman on the Board of Trustees of the Illinois Institute of Technology, on the Engineering Advisory Council for Purdue University, as Chairman of the American Institute of Chemical Engineers' Foundation, on the Board of Trustees for the George and Barbara Bush Foundation and on the Leadership Council for Houston Methodist Hospital. Mr. Graff holds an M.S. in Chemical Engineering from Purdue University, a B.S. in Chemical Engineering from the Illinois Institute of Technology, has studied business at the University of Chicago and has completed executive management programs at the Wharton School of the University of Pennsylvania, the University of Cambridge and the Stanford University Law School.

Mr. Sheets has been a director since January 2018. Mr. Sheets served as Executive Vice President and Chief Financial Officer of ConocoPhillips Company from October 2010 to February 2016. Mr. Sheets was associated with ConocoPhillips and its predecessor companies for more than 36 years and served in a variety of roles, including Senior Vice President of Planning and Strategy and Vice President and Treasurer. He began his career with Phillips Petroleum Company in 1980 as a process engineer. Mr. Sheets has served on the Board of Directors of Chord Energy Corporation since May 2024 and of Schlumberger Limited since October 2019. Mr. Sheets was a director of Enerplus Corporation from December 2017 until its acquisition by Chord Energy Corporation in May 2024 and is a former director of DCP Midstream Partners LP. Mr. Sheets received a bachelor's degree in chemical engineering from the Missouri University of Science and Technology and an M.B.A. from the University of Houston. Mr. Sheets is a member of the Board of Trustees at the Missouri University of Science and Technology.

Mr. Northcutt has been a director since May 2013. Mr. Northcutt was a partner of Navitas Midstream Partners, LLC from November 2013 and the Chairman of the Board, Chief Executive Officer and President of its manager, Navitas Midstream Management, LLC, from May 2014 until Navitas' acquisition by Enterprise Products Partners L.P. in February 2022. Mr. Northcutt was the President and Chief Executive Officer and a director of Copano Energy, L.L.C. until its acquisition by Kinder Morgan Energy Partners, L.P. in May 2013. Mr. Northcutt had also served as Copano's President and Chief Operating Officer from April 2003 until November 2009. Mr. Northcutt served as President of El Paso Global Networks Company from November 2001 until April 2003, Managing Director of El Paso Global Networks Company from April 1999 until November 2001 and Vice President, Business Development of El Paso Gas Services Company from January 1998 until April 1999. From 1988 until 1998, Mr. Northcutt held positions with various levels of responsibility at El Paso Energy and its predecessor, Tenneco Energy, including supervision of pipeline supply and marketing as well as regulatory functions. He began his career with Tenneco Oil Exploration and Production in 1982, working in the areas of drilling and production engineering. Mr. Northcutt served on the Board of Directors of Ball Ventures LLC from February 2023 until March 2025. Mr. Northcutt holds a Bachelor of Science degree in Petroleum Engineering from Texas Tech University and is a Registered Professional Engineer on inactive status in the State of Texas.

Mr. Cregg has been a director since December 2024. Mr. Cregg served as President, Chief Executive Officer and Director of AV Homes, Inc., from December 2012 until its sale to Taylor Morrison Homes in October 2018. From August 2011 through November 2012, he served as Senior Vice President of Finance and Chief Financial Officer of The ServiceMaster Company. He served as Executive Vice President and Chief Financial Officer of PulteGroup, Inc. (formerly known as Pulte Homes, Inc.) from May 2003 to May 2011; and as Senior Vice President and Chief Financial Officer of PulteGroup, Inc. from January 1998 to May 2003. Mr. Cregg also served as Executive Vice President and Chief Financial Officer of Zenith Electronics Corporation from 1996 to 1998; Vice President and Chief Financial Officer of Sweetheart Cup Company, Inc. from 1990 to 1996; and Vice President of Mead Corporation from 1989 to 1990. Mr. Cregg began his career at Continental Can Company, where he held a variety of accounting, finance, and administration roles. Mr. Cregg has served on the Board of Directors of Sterling Infrastructure Inc. since May 2019 and the Board of Directors of Minto Group since July 2024. Previously, Mr. Cregg served on the Board of Directors of Comerica Incorporated, from December 2006 until its merger with Fifth Third Bancorp in February 2026, and the Board of Directors of the Federal Reserve Bank of Chicago, Detroit Branch, from January 2004 to December 2009. Mr. Cregg received a bachelor's of science degree in accounting from Northeastern University and an M.B.A from J.L. Kellogg Graduate School of Management at Northwestern University.

Mr. Chao has been a director since January 2018. Mr. Chao is the Chief Executive Officer of Tempest Peak Management LLC, a position he has held since December 2022. Mr. Chao served as Executive Chairman of Tanglewood Property Management Company, an affiliate of our principal stockholder, from July 2017 until December 2024. From August 2013 to July 2017, Mr. Chao was the Company's Vice President of Business Development for Asia and Middle East and from July 2011 to August 2013 he was the Company's Director of Business Development for Asia and Middle East. Prior to joining Westlake, Mr. Chao was President and Director at PT Titan Petrokimia Nusantara, a petrochemical company based in Indonesia, from January 2008 to December 2010. Mr. Chao received a bachelor's degree in mechanical engineering from Rice University and an M.B.A. from the Wharton School of the University of Pennsylvania.

Ms. Sabat has been a director since May 2023. Ms. Sabat is the Managing Director - Investments for JADEC, LLC, an affiliate of our principal stockholder, a position she has held since June 2017. Ms. Sabat served as Manager of Tanglewood Property Management Company, an affiliate of our principal stockholder, from September 2017 to December 2025. Ms. Sabat began her career with The Goldman Sachs Group, Inc. in July 2001, eventually serving as Vice President for Asset Management and ending her tenure as Managing Director in May 2017. She is the daughter of Albert Y. Chao, the sister of John T. Chao, the niece of James Y. Chao, and the cousin of David T. Chao and Catherine T. Chao. Ms. Sabat holds a bachelor's degree in psychology from Princeton University.

Ms. Chao has been a director since May 2023. Ms. Chao has been the director and co-founder of Tuyo Development since 2019 and a founding partner of Grains of Salt since 2016. From 2007 to 2013, Ms. Chao was a project architect with Greg Yang Design and, from 2008 to 2013, she was an adjunct professor of the School of Constructed Environments at Parsons The New School of Design. In addition, since 1997, Ms. Chao served in various roles at Tanglewood Property Management Company, an affiliate of our principal stockholder, most recently as Manager, from September 2017 until December 2025. Ms. Chao holds a bachelor's degree in product design from Stanford University, a Masters of Architecture from the Rhode Island School of Design, and an MBA and a Masters in Urban Planning from Columbia University. Ms. Chao is a registered architect in New York and Oregon, a member of the American Institute of Architects and a member of the American Planning Association.

Ms. Lubel has been a director since May 2020. Ms. Lubel served as the Chairman, President and Chief Executive Officer of CST Brands, Inc. from its spin-off from Valero Energy Corporation in 2013 until CST's acquisition by Alimentation Couche-Tard Inc. in June 2017. From October 2008 through December 2012, Ms. Lubel served as Valero's Executive Vice President and General Counsel, with responsibility over Valero's legal, ad valorem tax, health, safety and environmental, energy and gases, reliability and project execution departments. She joined Valero in 1997. Ms. Lubel has served on the Board of Directors of PBF Energy Inc. since August 2017, the Board of Directors of the Southwest Research Institute since 2019, the Board of Directors of Arcosa, Inc. since November 2021, and the Board of Directors of Inspire Trust Company, N.A. since January 2022. Previously, Ms. Lubel served on the Board of Directors of WPX Energy Inc. from December 2011 through January 2021. Since 2022, Ms. Lubel has been an executive coach and independent consultant with the Exco Group. Ms. Lubel holds bachelor's of arts degrees in Spanish and International Studies from Miami University (Ohio), a master of arts degree in International Relations from Baylor University and a juris doctorate degree from the University of Texas School of Law. She is also a graduate of the Executive Program at Stanford University.

Effective 31st August 2026, Tommy E. Darby was appointed to the Company as Vice President and Chief Accounting Officer. In connection with his appointment as Vice President, Chief Accounting Officer of the Company, Mr. Darby was also appointed as Vice President, Chief Accounting Officer of Westlake Chemical Partners GP LLC, a wholly-owned subsidiary of the Company and the general partner of Westlake Chemical Partners LP, effective August 31, 2026. Prior to joining the Company, from August 2022 to April 2025, Mr. Darby served as Vice President and Chief Accounting Officer of Pactiv Evergreen Inc. (now Novolex) and, earlier in his tenure there, as Vice President and Controller. From March 2008 to May 2020, Mr. Darby held various leadership roles at Valaris plc (now Valaris Limited) and its predecessor companies in external reporting, financial systems and internal audit, before serving as Vice President and Controller and later as Vice President, Finance. Earlier in his career, Mr. Darby worked in audit and assurance at Deloitte LLP. Mr. Darby received a Bachelor of Science degree in Accounting and a Master of Science degree in Auditing and Financial Accounting from the University of North Texas and is a Certified Public Accountant.

On April 15, 2026, the Compensation Committee of the Board of Directors of Westlake Corporation appointed Jonathan H. Baksht, as Senior Vice President and Chief Financial Officer of the Company, effective June 15, 2026. In connection with his appointment as Senior Vice President and Chief Financial Officer of the Company, Mr. Baksht will also be appointed as Senior Vice President and Chief Financial Officer and as a director of Westlake Chemical Partners GP LLC, a wholly-owned subsidiary of the Company and the general partner of Westlake Chemical Partners LP, effective June 15, 2026. Prior to joining the Company, Mr. Baksht served as Executive Vice President and Chief Financial Officer of Fortune Brands Innovations, Inc. from May 2025 to March 2026. From May 2022 to May 2025, Mr. Baksht served as Chief Financial Officer of Pactiv Evergreen Inc. and from August 2013 to September 2021, Mr. Baksht held various positions at Valaris Limited, including most recently as Chief Financial Officer from November 2015 until September 2021. Earlier in his career, he worked in investment banking at Goldman, Sachs & Co. and in management consulting at Andersen Consulting. He has served on the Board of Directors of Duxion Motors Inc. since January 2022 and previously served on the Board of Directors of ARO Drilling, a joint venture between Valaris and Saudi Aramco, from April 2019 to September 2021. Mr. Baksht received a bachelor's of science degree in electrical engineering from the University of Texas at Austin and an M.B.A from the Kellogg Graduate School of Management at Northwestern University.

The Board appointed Brian Powers as Senior Vice President, Performance & Essential Materials Segment Head of the Company, effective as of April 2, 2026.

Mr. Chao has been a director since August 2018. Since September 2025, Mr. Chao has served as the Company's Senior Vice President, Strategy and Corporate Development. From July 2024 to September 2025, Mr. Chao served as Senior Vice President and Managing Director of Westlake Innovations, Inc. (one of our subsidiaries) and from March 2021 to July 2024, Mr. Chao was its Vice President and Managing Director. From October 2018 to February 28, 2021, he was a Managing Director of Tanglewood Property Management Company, an affiliate of our principal stockholder. From March 2015 to October 2018, he was with New York Public Radio, as the organization's Vice President of Partnerships and New Business from March 2015 to June 2016, Senior Vice President of Business and Strategy from June 2016 to August 2017 and Chief Operating Officer from August 2017 to October 2018. Mr. Chao was previously in the strategy and finance practice at McKinsey & Company where he advised energy and commodity companies, beginning in 2004 and ending his tenure as a partner in 2013. From 2000 to 2002, he was a financial analyst at the Company. Mr. Chao received a bachelor's degree in chemical engineering from Rice University and an M.B.A. from the Massachusetts Institute of Technology.

Mr. Szwejbka has been our Senior Vice President, Housing & Infrastructure Products Segment Head since April 2025. From July 2024 to April 2025, Mr. Szwejbka served as our Senior Vice President, Westlake Royal Building Products; from March 2022 to July 2024, he was our Vice President, Building Products; and, from March 2017 to March 2022, he was our Vice President, Exteriors. Prior to joining Westlake, Mr. Szwejbka was Chief Operating Officer of the Pet Loss Center/Graycourt Capital from September 2016 to February 2017. From May 2013 to January 2016, he served as President, Pipe and Precast US for Forterra plc (formerly Hanson Building Products). From August 2005 to May 2013, he held a variety of senior positions at Leigh Hanson Inc. (now Heidelberg Material) and its predecessor company, Hanson Brick, including most recently as Senior Vice President, Commercial Pipe and Precast US. He began his career with Teepak International, Inc. in 1991. Mr. Szwejbka holds a B.S. in Chemical Engineering from the University of Wisconsin-Madison and an M.B.A. from the University of Illinois.

Mr. Ederington has been our Executive Vice President, Legal and External Affairs since April 2025. From April 2023 to April 2025, Mr. Ederington served as our Executive Vice President, Performance and Essential Materials, General Counsel and Chief Administrative Officer; from February 2022 to April 2023, he served as our Executive Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary; from July 2017 to February 2022; he served as our Senior Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary; from December 2015 to July 2017, he served as our Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary; and, from October 2013 to December 2015, he served as our Vice President, General Counsel and Corporate Secretary. In addition, Mr. Ederington has been a director of Westlake Partners' general partner since its formation in March 2014 and its Executive Vice President, Legal and External Affairs since May 2025. Mr. Ederington was Westlake Partners' general partner's Executive Vice President, Performance and Essential Materials, General Counsel and Chief Administrative Officer from May 2023 to May 2025; Executive Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary from March 2022 to May 2023; Senior Vice President, General Counsel, Chief Administrative Officer and Corporate Secretary from February 2021 to March 2022; and, its Vice President, General Counsel and Secretary from March 2014 to February 2021. Prior to joining Westlake, he held a variety of senior legal positions at LyondellBasell Industries, N.V. and its predecessor companies, LyondellBasell Industries AF SCA and Lyondell Chemical Company, including most recently as Associate General Counsel, Commercial & Strategic Transactions. He began his legal career more than 25 years ago at the law firm of Steptoe & Johnson, LLP. Mr. Ederington holds a B.A. from Yale University and received his J.D. from Harvard University.

On February 20, 2026, the Board of Directors of the Company elected Mr. Bhavesh V. Bob Patel as members of the Board. Mr. Patel, age 59, served as President of Standard Industries until June 2024, having been elevated to that role in April 2023 from W.R. Grace & Co., a Standard Industries subsidiary that he joined as Chief Executive Officer in January 2022. From January 2015 to January 2022, Mr. Patel served as Chief Executive Officer of LyondellBasell Industries NV. He joined LyondellBasell in March 2010 and, prior to becoming Chief Executive Officer, held several senior leadership roles within the company, including Senior Vice President and subsequently Executive Vice President of Olefins & Polyolefins - Europe, Asia & International and Technology. Mr. Patel began his career at Chevron Corporation and Chevron Phillips Chemical Company, where over approximately 20 years he held a number of senior roles, including leadership positions based in both Singapore and the United States. He has served on the Board of Directors of Air Products Chemicals, Inc. since January 2025 and the Board of Directors of the Federal Reserve Bank of Dallas' Houston Branch since January 2021. Previously, Mr. Patel served on the Board of Directors of Halliburton Company from January 2021 to May 2025 and the Board of Directors of Union Pacific Corporation from February 2017 to May 2021. Mr. Patel received a bachelor's of science degree in chemical engineering from The Ohio State University and an M.B.A from Temple University.

Mr. Janssens has been our Senior Vice President, Operations-Performance and Essential Material & Corporate Logistics since March 2022. From January 2021 to March 2022, Mr. Janssens served as our Vice President, Olefins, Feedstocks & Energy; from December 2019 to December 2020, he was our Vice President, Olefins & Logistics; from July 2017 to November 2019, he was our Vice President, Corporate Development, Logistics & IT; from January 2016 to June 2017, he was our Vice President, Logistics & IT; and, from October 2015 to December 2015, he was our Vice President, Logistics & Business Process Improvement. Prior to joining Westlake, Mr. Janssens was a consultant, from September 2002 to June 2009, and later, a Partner, from July 2009 to September 2015, with McKinsey & Company, where he advised energy and chemicals clients on strategic, commercial, operational and business process improvement projects. He began his career with Shell International in 1991, where he held a variety of commercial, engineering and planning roles. Mr. Janssens holds a MSc in Chemical Engineering from Eindhoven University of Technology and an MBA from the University of Chicago.