Westlake Growth & Investment Strategy

A Proven Strategy of Creating Value Leveraging historical strengths across incremental opportunities 25% Ten Year Average 20% 15% 10% 5% 0% Vertically Integrated, Globally Advantaged Integrated chain supported by a well invested production footprint with a globally advantaged low-cost position and downstream focus North America Focused Branded Products Strong brand recognition across the portfolio with resilient businesses and sustainably oriented products Superior Stewards of Capital Maintaining our strong capital discipline aimed at operational improvements, capacity additions and M&A backed by an economic value-add approach Return on Capital Employed ■Westlake Chemical Peers Building Peers Robust Shareholder Value Maximizing long-term shareholder value through focused execution, capital allocation, partnering with customers, and delivering essential products with a focus on sustainability Aimed at Enhancing Returns Through Value Creation and Customer Solutions 15 Source: FactSet: Chemical peers includes: EMN, HUN, OLN, LYB, DOW Building products peer includes: JHX, FBHS, MAS, PGTI, DOOR, CNR, JELD Westlake

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