Westlake Growth & Investment Strategy

Summarizing Westlake's Economic Engine Westlake Operating System • Core Market Drivers Organic Growth Enhancers • Inorganic Growth Opportunities Epoxy brings new growth platform Margin Enhancers Investing in automation and digitization Financial Outputs • Investing organically to • increase integration Acquiring assets and technology to access higher- value added products and markets • Achieving operational excellence through efficient allocation of capital, continuous improvement, empowering employees and focus on sustainability • Leveraging best-in-class • technology and processes inherited through M&A across global footprint Vertical integration between 104 PEM and HIP Performance & Essential Materials Housing & Infrastructure • Advantaged geographic footprint for low-cost and resilient production Significant feedstock and production capacity Positive supply and demand dynamics • Investing in superior in-house R&D Leveraging global sales team • Vertical / Downstream integration PVC, EDC & VCM expansions • Penetrating new and sustainable end markets and adjacencies through acquisitions • Shifting mix to higher growth and higher margin applications • Outperforming peers in EBITDA margin, ROCE and ROA . Strong market position • Integration of recent • Boral, Lasco and Dimex • with the #1 - #3 positions across most product categories Favorable housing and construction trends due to underbuilding • Demographic trends . acquisitions provides cross-selling opportunities and more complete product offering across distribution network Top-tier market positions drives market penetration • bring leadership positions and new platforms for growth • Penetrating new end markets and adjacencies through acquisitions Producing recycled flexible PVC and PE compounds provides margin benefits Delivering on cost synergies from acquisitions High-valued compounding capacity Improved PVCO margins • Lowering cost per unit through automation and throughput • • FCF generation improvement High teens EBITDA margin in HIP Reinvestment in production and product innovation Westlake

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