Westlake Chemical Partners L.P. (NYSE:WLKP) today announced that its 2021 tax packages, including schedule K-1s, are now available online. They may be accessed online through the K-1 Tax Package Support website www.taxpackagesupport.com/wlkp . First time users will need to sign up for online account access which may also be done on the K-1 Tax Package Support website. The partnership expects to begin mailing K-1s by mid-March. We encourage unit holders to access the K-1s online through the Tax Package Support website at www.taxpackagesupport.com/wlkp for the quickest availability. For additional information, unitholders may call K-1 Tax Package Support toll free at (888) 826-8318 weekdays between 8 a.m. and 5 p.m. CT. About Westlake Chemical Partners LP Westlake Chemical Partners is a limited partnership formed by Westlake Corporation to operate, acquire and develop ethylene production facilities and other qualified assets. Headquartered in Houston, the Partnership owns a 22.8%

Record annual net sales of $11.8 billion, an increase of 57% vs. 2020 net sales Record annual net income of $2.0 billion, an increase of 511% vs. 2020 net income Record annual EBITDA of $3.7 billion, an increase of 196% vs. 2020 EBITDA Transformational investments of approximately $3.8 billion in building products and Hexion's global epoxy business Integrated portfolio of diversified businesses under one unified brand with two segments – Housing and Infrastructure Products ("HIP") and Performance and Essential Materials ("PEM") Market conditions continue to look favorable Westlake Corporation (NYSE: WLK) (the "Company" or "Westlake") today announced record fourth quarter and record full year 2021 results. SUMMARY FINANCIAL HIGHLIGHTS ($ in millions except per share data)     Three Months Ended December 31,   Twelve Months Ended December 31,     2021   2020   2021   2020                   Westlake

Declared quarterly distribution of $0.4714 per unit; 30 th consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported record net income attributable to the Partnership in the fourth quarter of 2021 of $29.5 million, or $0.84 per limited partner unit, an increase of $14.5 million compared to fourth quarter 2020 net income of $15.0 million. The Partnership's net income in the fourth quarter of 2021 benefited from a buyer deficiency fee as well as recovery of certain other costs from Westlake Corporation ("Westlake") attributable to an unplanned outage. Cash flows from operating activities in the fourth quarter of 2021 were $21.9 million, a decrease of $10.6 million compared to fourth quarter 2020 cash flows from operating activities of $32.5 million. This decrease in cash flows from operating activities was primarily due to the buyer deficiency fee and recovery of certain costs from Westlake that will be paid in 2022. For the three

Westlake Corporation (NYSE: WLK) today announced its target to reduce Scope 1 and Scope 2 CO 2 equivalent emissions per ton of production by 20% by 2030 from a 2016 baseline. To further reduce its carbon footprint, Westlake’s strategy is to optimally allocate capital to both proven and emerging technologies, including additional product and operational innovations. This strategy includes energy-efficiency projects, increasing power from less carbon-intensive electricity providers, adding more hydrogen as a fuel gas, and other continuous operational improvements. “Westlake has been lowering carbon intensity every year through our continuous improvement efforts and capital investments,” said Westlake President and Chief Executive Officer Albert Chao. “As a manufacturer of essential products that enhance people’s lives every day, we are committed to innovating more sustainable products and producing them in a more sustainable fashion.” In 2021, Westlake announced several sustainability

$0.2975 cents per share dividend declared payable on March 15, 2022 The Board of Directors of Westlake Corporation (NYSE:WLK) declared today a regular dividend distribution of $0.2975 per share for the fourth quarter of 2021. This dividend will be payable on March 15, 2022, to stockholders of record on March 1, 2022. This is the 70th 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/20220218005298/en/ Media Inquiries:

Westlake Chemical Corporation (NYSE: WLK), today announced that it will host an Investor Day on Thursday, April 7, 2022, at 9:00 a.m. Eastern Time. During the event, Albert Chao, President and Chief Executive Officer; Roger Kearns, Chief Operating Officer; Robert Buesinger, Executive Vice President; Steve Bender, Chief Financial Officer; and other members of the executive leadership team will present an in-depth overview of the Company’s long-term strategic vision and direction, financial outlook, capital allocation priorities, and plans to drive long-term shareholder value. The event will be Westlake’s inaugural investor day. As the company has significantly diversified its business portfolio recently through both acquisitions and organic growth, the event provides the opportunity to highlight the breadth of diversified products Westlake makes with leading positions serving the building and construction, automotive and consumer lifestyle, and packaging and healthcare industries. The

New name reflects the Company’s more diversified business portfolio stemming from recent acquisitions and overall organic and strategic growth Westlake is now organized under one unified brand with two segments – Housing & Infrastructure Products and Performance & Essential Materials Westlake recently concluded four key acquisitions valued at approximately $3.8 billion Westlake Chemical Corporation (NYSE: WLK) today announced that it plans to officially change its name to Westlake Corporation effective on February 18, 2022. Westlake is now organized under one unified brand name with two financial reporting segments: Housing & Infrastructure Products and Performance & Essential Materials. “We have reached an important milestone in the history of our Company,” said Westlake President and Chief Executive Officer Albert Chao. “Our business portfolio has evolved over the last decade, particularly in the last year when we celebrated our 35 th Anniversary. Through a