Westlake Growth & Investment Strategy

Specialty & Downstream Product Mix Enhances Margins Product Market Position Price Advantage (1) . (per pound) Avg. Specialty PVC Specialty PVC #2 in Global PVC #2 in Global Specialty PVC 20.0¢ Over Commodity PVC Epoxy Specialty Resins #2 in Epoxy Resin 29.0¢ Avg. Specialty Ероху Over Commodity Epoxy Avg. Specialty 15.0¢ Specialty PE Leading Producer LDPE #3 in the Americas Premium PE Over Commodity PE 8.6¢ 7.8¢ • • • Westlake is a leading producer of specialty PVC delivering higher margins and increased earnings stability Population growth and urbanization in global economies drives specialty product demand in automotive, medical and housing applications as well as consumer durables Epoxy broadens Westlake's end-market exposure to higher growth sustainability-oriented markets such as wind energy as well as automotive and aerospace light weighting Leading producer of specialty polyethylene that has higher pricing and customer specification compared to other PE grades Westlake's higher priced and application focused specialized PE product combined with its globally advantaged cost position drives higher margin and more resilient profitability 46 (1) Based on cycle averages Source: IHS Markit, company estimates LDPE vs. LLDPE LDPE vs. HDPE Westlake

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