$0.2975 cents per share dividend declared payable on June 7, 2022 The Board of Directors of Westlake Corporation (NYSE:WLK) declared today a regular dividend distribution of $0.2975 per share for the first quarter of 2022. This dividend will be payable on June 7, 2022, to stockholders of record on May 23, 2022. This is the 71st successive quarterly dividend that Westlake has declared since completing its initial public offering in August 2004. 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 America, we provide the building blocks for vital solutions — from housing and construction, to packaging and healthcare, to automotive and consumer. For more information, visit the company's web site at www.westlake.com . View source version on businesswire.com: https://www.businesswire.com/news/home/20220512006016/en/ Media Inquiries:
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Declared quarterly distribution of $0.4714 per unit; 31 st consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the first quarter of 2022 of $16.2 million, or $0.46 per limited partner unit, an increase of $1.1 million compared to first quarter 2021 net income of $15.1 million. The Partnership's net income in the first quarter of 2022 was the result of strong production volumes and solid margins on third-party sales. The first quarter of 2021 was impacted by Winter storm Uri and benefited from a $9.7 million buyer deficiency fee as well as recovery of certain other costs from Westlake Corporation ("Westlake") attributable to a related unplanned outage. Cash flows from operating activities in the first quarter of 2022 were $104.8 million, a decrease of $50.6 million compared to first quarter 2021 cash flows from operating activities of $155.4 million. The decrease was due to the

Record quarterly net sales of $4.1 billion, an increase of 72% vs. first quarter 2021 net sales Record quarterly net income of $756 million, an increase of 212% vs. first quarter 2021 net income Record quarterly EBITDA of $1.3 billion, an increase of 135% vs. first quarter 2021 EBITDA Expanded specialty product focused portfolio with acquisition of Hexion's global epoxy business Westlake Corporation (NYSE: WLK) (the "Company" or "Westlake") today announced record first quarter 2022 results. SUMMARY FINANCIAL HIGHLIGHTS ($ in millions except per share data)       Three Months Ended March 31,       2022   2021             Westlake Corporation           Income from operations     $ 1,032   $ 346 Net income attributable to Westlake Corporation     $ 756   $ 242 Diluted earnings per common share     $ 5.83   $ 1.87 EBITDA     $ 1,300   $ 553

$0.4714 cents per unit distribution declared payable on May 26, 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 31st quarterly distribution announced by the Partnership since its initial public offering. The distribution will be payable on May 26, 2022, to unit holders of record on May 12, 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 Chemical

Westlake Chemical Partners (NYSE: WLKP) will release its first quarter 2022 earnings prior to the market opening on Tuesday, May 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 call, dial (855) 765-5686, or (234) 386-2848 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 6739002. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/zeeudc2d and the earnings release can be obtained via the company's Web page at, https://investors.wlkpartners.com/corporate-profile/default.aspx . A replay of the conference call will be available beginning two hours after its conclusion for seven days. To hear a replay, dial (855) 859-2056 or (404) 537-3406 for international callers. The replay passcode is 6739002. About Westlake Chemical Partners: Westlake Chemical Partners is a

Westlake Corporation (NYSE: WLK) will release its first quarter 2022 earnings prior to the market opening on Tuesday, May 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 call, dial (855) 760-8160, or (704) 288-0624 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 4246547. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/5ytbsbdp and the earnings release can be obtained via the company’s Web page at https://investors.westlake.com/news/default.aspx . A replay of the conference call will be available beginning two hours after its conclusion for seven days. To hear a replay, dial (855) 859-2056 or (404) 537-3406 for international callers. The replay passcode is 4246547. About Westlake: Westlake is a global manufacturer and supplier of materials and innovative