Westlake Global Compounds, a leading provider of PVC compounds, is combining its sustainability efforts with Westlake Dimex, a leading recycler of industrial PVC. This collaboration will leverage Westlake Global Compounds' expertise in PVC compounds with Westlake Dimex's expertise in recycled materials, helping Westlake Global Compounds in its efforts to reduce waste and its environmental impact. "Westlake Global Compounds and Westlake Dimex will continue our efforts to reduce our environmental footprint and expand our participation in recycling and investment in products that contribute to sustainability,” said Renee Havrilla, vice president of Westlake Global Compounds and Westlake Dimex. The partnership will focus on the reprocessing of Westlake Global Compounds’ materials and toll processing services offered by Westlake Dimex, including grinding, shredding, blending and compounding. Westlake Dimex has achieved nine GreenCircle Certified Recycled Content certifications, covering

$0.500 per share dividend declared payable on December 6, 2023 The Board of Directors of Westlake Corporation (NYSE: WLK) today declared a regular dividend distribution of 50 cents per share for the third quarter of 2023. This dividend will be payable on December 6, 2023, to stockholders of record on November 21, 2023. This is the 77th successive quarterly dividend that Westlake has declared since completing its initial public offering in August 2004. The statements in this release that are not historical facts, including statements regarding future repurchases of common stock, are forward-looking statements. These forward-looking statements are subject to significant risks and uncertainties. Actual results could differ materially, based on factors including, but not limited to, the ultimate timing, outcome and results of integrating the operations of recent acquisitions; general economic and business conditions; the cyclical nature of the chemical and building products industries;

Record Housing and Infrastructure Products segment income from operations of $256 million Record Housing and Infrastructure Products segment EBITDA of $327 million Net cash provided by operating activities of $696 million and free cash flow of $451 million Westlake Corporation (NYSE: WLK) (the "Company" or "Westlake") today announced third quarter 2023 results. SUMMARY FINANCIAL HIGHLIGHTS ($ in millions except per share data)       Three Months Ended September 30, 2023   Three Months Ended June 30, 2023   Three Months Ended September 30, 2022               Westlake Corporation             Net sales   $ 3,115     $ 3,251     $ 3,956   Income from operations   $ 349     $ 396     $ 516   Operating income margin     11%     12%     13%

Declared quarterly distribution of $0.4714 per unit; 37 th consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the third quarter of 2023 of $13.2 million, or $0.37 per limited partner unit, compared to third quarter 2022 net income of $14.8 million. The reduction in Partnership net income in the third quarter of 2023 compared to the third quarter of 2022 was the result of higher interest expense attributable to higher interest rates on floating rate debt. Cash flows from operating activities in the third quarter of 2023 were $100.9 million, a decrease of $14.6 million compared to third quarter 2022 cash flows from operating activities of $115.5 million. The decrease was primarily due to lower Partnership net income and less favorable working capital changes. For the three months ended September 30, 2023, MLP distributable cash flow was $13.6 million, a decrease of $3.1 million