Westlake Growth & Investment Strategy

1 2 Successful History of M&A Investment Criteria Adjacent applications and products in core HIP and PEM segments Improves vertical integration strategy to further reduce costs • • . Focus . Investment below replacement cost Expands specialty PE offering Product integration improvement Specialty PVC offering expands market access Investment below replacement cost History of Successful Integration Acquisition of specialty PE from Eastman Chemical Acquisition of specialty PVC leader Vinnolit 3 Buying below replacement costs 4 5 Enhances production and technology capabilities Disciplined and opportunistic approach to acquisition opportunities Supporting Key Attributes • Positioned for profitable growth • ⚫ Defensible longer-term . Favorable market outlook • Strong cashflow and balance sheet • Sustainable product offering 102 . Investment below replacement cost Product integration • Reduces cost and increases production . . Rich mix of leading brand products Expands geographic reach Product integration and cross-selling capabilities • Investment below replacement cost • Provides access to current & new markets • Improves integration . Investment at attractive price • Reduces cost of production • Improves vertical integration Acquisition of Axiall Corporation Acquisition of Boral North America, LASCO, Dimex Epoxy acquisition from Hexion Acquired 50% of LACC ethylene joint venture Westlake

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