Westlake Growth & Investment Strategy

Leading Scale, Vertical Integration with Globally Advantaged Low-Cost Position Drives Chlorovinyl Margin Support Chlor-Alkali Chlorine Caustic Soda Overview of the Chlorovinyls Chain Chlorinated Products Ethylene Vinyl Chloride Dichloride Monomer (EDC) (VCM) Polyvinyl Chloride (PVC) HIP PVC Products Westlake benefits from its globally competitive cost position and integrated production footprint as the world's largest chlorovinyls manufacturer Significant benefits from low cost North American natural gas and ethane driving a globally advantaged position in producing ethylene and chlor-alkali Integrated position as the world's largest chlorovinyls producer further lowers. production costs and enhances margin capture and resiliency 41 Ethylene Source: IHS Markit Merchant Sales Complexity and capital cost of the vinyls chain raises barriers to entry Epoxy Recent Epoxy acquisition captures additional integration and downstream focus Westlake

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