2018 Investor Presentation

Ruth I. Dreessen

Chairman of the Board

Ruth I. DreessenĀ has served as a director of the Company since March 2012. From 2010 to 2018, Ms. Dreessen has served as Managing Director of Lion Chemical Partners, LLC, a private equity firm focused on the chemical and related industries. Prior to joining Lion Chemical Partners, Ms. Dreessen served as the Executive Vice President and Chief Financial Officer of TPC Group Inc. from 2005 to 2010. Before joining TPC Group, Ms. Dreessen served as Senior Vice President, Chief Financial Officer and Director of Westlake Chemical Corporation. She spent 21 years at J.P. Morgan Securities LLC and predecessor companies, ultimately as a Managing Director of chemicals investment banking. Ms. Dreessen serves as the independent Chairman of the Board and is also a member of the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee (Chair). Since January 2018, Ms. Dreessen has served on the board of Andeavor Logistics LP. She previously served on the boards of Targa Resources LP, Versar, Inc., the Georgia Gulf Corporation, Westlake Chemical Corporation and the Better Minerals & Aggregates Corporation (US Silica).

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Chairman of the Board