2Q 2023 Earnings Presentation 2 Westlake Second Quarter 2023 Highlights ▪ Net sales of $3.3 billion, net income of $297 million and EBITDA(1) of $690 million ▪ Elevated level of unplanned outages impacted operating income and EBITDA by ~$50 million ▪ Performance and Essential Materials second quarter sales of $2.1 billion with EBITDA(2) of $435 million ▪ Housing and Infrastructure Products second quarter sales of $1.1 billion with EBITDA(3) of $244 million ▪ Raising 2023 cost savings target to $75 - $105 mi ...