Mr. Chao has been a director since August 2018. Since July 2024, Mr. Chao has 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. He is the son of Albert Y. Chao, the nephew of James Y. Chao, the brother of Carolyn C. Sabat, and the cousin of David T. Chao and Catherine T. Chao. 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. 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 and the Board of Directors of Momentive Performance Materials, Inc. since December 2024. 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 Yellowstone Academy. Mr. McCollum received a bachelor’s of Business Administration degree in Accounting from Baylor University in 1980 and is a CPA in Texas.

Mr. Bender has been our Executive Vice President and Chief Financial Officer since July 2017. From February 2008 to July 2017, Mr. Bender served as our Senior Vice President and Chief Financial Officer. In addition, Mr. Bender served as our Treasurer from July 2011 to April 2017, a position he also held from February 2008 until December 2010. From February 2007 to February 2008, Mr. Bender served as our Vice President, Chief Financial Officer and Treasurer and from June 2005 to February 2007, he served as our Vice President and Treasurer. In addition, Mr. Bender has been a director of Westlake Partners' general partner since its formation in March 2014, its Executive Vice President and Chief Financial Officer since February 2021, and its Senior Vice President and Chief Financial Officer from March 2014 to February 2021. Prior to joining Westlake, from June 2002 until June 2005, Mr. Bender served as Vice President and Treasurer of KBR, Inc., and from 1996 to 2002 he held the position of Assistant Treasurer for Halliburton Company. Prior to that, he held various financial positions within that company. Additionally, he was employed by Texas Eastern Corporation for over a decade in a variety of increasingly responsible audit, finance and treasury positions. Mr. Bender received a Bachelor of Business Administration from Texas A&M University and an M.B.A. from Southern Methodist University. Mr. Bender is also a Certified Public Accountant.