Westlake Corporation (NYSE: WLK) (the "Company" or "Westlake") today announced third quarter 2022 results. SUMMARY FINANCIAL HIGHLIGHTS ($ in millions except per share data)     Three Months Ended September 30,   Nine Months Ended September 30,     2022   2021   2022   2021                   Westlake Corporation                 Income from operations   $ 516   $ 861   $ 2,723   $ 1,927 Net income attributable to Westlake Corporation   $ 401   $ 607   $ 2,015   $ 1,371 Diluted earnings per common share   $ 3.10   $ 4.69  

$0.4714 cents per unit distribution declared payable on November 28, 2022 The Board of Directors of Westlake Chemical Partners GP LLC, the general partner of Westlake Chemical Partners LP (the "Partnership") (NYSE:WLKP), has declared a distribution of $0.4714 per unit. This is the 33rd quarterly distribution announced by the Partnership since its initial public offering. The distribution will be payable on November 28, 2022, to unit holders of record on November 10, 2022. This release is intended to be a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat one hundred percent (100.0%) of the Partnership’s distributions to non-U.S. investors as being attributable to income that is effectively connected with a United States trade or business. Accordingly, the Partnership’s distributions to non-U.S. investors are subject to federal income tax withholding at the highest applicable effective tax rate. About Westlake Chemical Partners LP Westlake

Westlake Chemical Partners (NYSE: WLKP) will release its third quarter 2022 earnings prior to the market opening on Thursday, November 3, 2022. The company will host a conference call at 1:00 p.m. Eastern Time (12:00 p.m. Central Time) on the same day to discuss the earnings release. To access the conference by phone, it is necessary to pre-register at https://register.vevent.com/register/BIf58da988154b49dea6b2903159febb3b . Once registered, you will receive a phone number and unique PIN number. When you dial in, you will input the PIN number to be placed into the call. The conference call and replay will be available via webcast at https://edge.media-server.com/mmc/p/jcohy5gt and the earnings release can be obtained via the company's Web page at, https://investors.wlkpartners.com/corporate-profile/default.aspx . About Westlake Chemical Partners: Westlake Chemical Partners is a limited partnership formed by Westlake Corporation to operate, acquire and develop ethylene production

Westlake Corporation (NYSE: WLK) will release its third quarter 2022 earnings prior to the market opening on Thursday, November 3, 2022. The company will host a conference call at 11:00 a.m. Eastern Time (10:00 a.m. Central Time) on the same day to discuss the earnings release. To access the conference by phone, it is necessary to pre-register at https://register.vevent.com/register/BId53ccc41b34744e19fa224843ba1fcb6 . Once registered, you will receive a phone number and unique PIN number. When you dial in, you will input the PIN number to be placed into the call. The conference call and replay will be available via webcast at https://edge.media-server.com/mmc/p/phzpfjoh and the earnings release can be obtained via the company’s Web page at https://investors.westlake.com/news/default.aspx . About Westlake: Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, with operations in Asia, Europe and North

Westlake Corporation (NYSE: WLK) today released its 2021 Environmental, Social and Governance Report and, concurrently, its Global Reporting Initiative (GRI) and Sustainability Accounting Standards Board (SASB) Appendix, as the company enhances its data reporting systems and reinforces its commitment to transparency. The ESG report includes Westlake’s fifth annual sustainability update and demonstrates how ESG practices are integrated throughout the corporation’s core business activities. The report highlights Westlake’s drive to improve sustainable practices across operations, products, and in management; maintain strong engagement in its communities; and deliver on customers’ expectations for sustainable innovate products. This integrated approach ensures that the corporation’s guiding ESG principles are applied across the global organization and that best practices from within strategic business units are shared and adopted. Over the past year, since the publication of its 2020 ESG

Westlake Chemical Partners (NYSE: WLKP) today provided the following information regarding 2021 investor tax reporting: As previously noted in the 2021 Investor Tax Reporting Package for your investment in Westlake Chemical Partners, LP, the Partnership will report items of international tax relevance to our partners on new Schedule K-3 beginning in tax year 2021. As we disclosed in our quarterly distribution press releases, all of our income is effectively connected with a United States trade or business. However, a limited number of unitholders (primarily foreign unitholders and unitholders having US international reporting obligations) may need the detailed information disclosed on Schedule K-3 for their specific reporting requirements. Our Schedule K-3 for tax year 2021 is now available online at www.taxpackagesupport.com/WLKP . This information may be necessary in the completion of your tax return. As such we encourage you to review the information contained on your Schedule K-3