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