Apr. 16, 2020- Westlake Chemical Corporation (NYSE: WLK) today announced that the company and the Ting Tsung and Wei Fong Chao Foundation have contributed a combined $1 million to the Greater Houston COVID-19 Recovery Fund. The Greater Houston COVID-19 Recovery Fund was established by the United Way of Greater Houston and the Greater Houston Community Foundation to provide emergency assistance, like access to food, shelter and health care, for individuals adversely affected by the COVID-19 pandemic. “As part of the Houston community, which has been Westlake’s home and given us so much, we feel it is a privilege to help in a time or need,” said Westlake President and CEO Albert Chao, who is also president of the charitable foundation established in 1999 by the Chao family. In addition to this financial contribution, Westlake sites around the globe and the Ting Tsung and Wei Fong Chao Foundation have both donated personal protective equipment to hospitals and provided financial

Apr. 20, 2020- Westlake Chemical Partners (NYSE: WLKP) will release its 2020 first quarter earnings prior to the market opening on Monday, May 4, 2020. 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 6470789. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/pz3nynuo and the earnings release can be obtained via the company's Web page at, http://investors.wlkpartners.com/CorporateProfile . 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 6470789. About Westlake Chemical Partners: Westlake Chemical Partners is a

Apr. 20, 2020- Westlake Chemical Corporation (NYSE: WLK) will release its 2020 first quarter earnings prior to the market opening on Monday, May 4, 2020. 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 5672078. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/ksc4zxqo and the earnings release can be obtained via the company’s Web page at https://www.westlake.com/investor-relations . 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 5672078. About Westlake: Westlake is a global manufacturer and supplier of

$0.4714 cents per unit distribution declared payable on May 26, 2020 Apr. 30, 2020- 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 by the Partnership of $0.4714 per unit. This is the 23rd quarterly distribution announced by the Partnership since its initial public offering. The distribution will be payable on May 26, 2020, to unit holders of record on May 11, 2020. “The strength of the Partnership’s stable and predictable cash flows from 95% of its production at a fixed margin insulated from commodify price risk to its investment grade parent provides flexibility in the uncertain current economic environment caused by COVID-19,” stated Albert Chao, President and Chief Executive Officer of Westlake Chemical Partners GP LLC. “This allows us to maintain our distribution at our prior quarter level to build cash and avoid creating any capital market needs in the

Net income of $1.13 per diluted share, or $145 million, for the first quarter of 2020 Cash and cash equivalents of $1.54 billion EBITDA of $337 million for the first quarter of 2020 May 4, 2020- Westlake Chemical Corporation (NYSE: WLK) (the "Company" or "Westlake") today reported net income attributable to Westlake for the three months ended March 31, 2020 of $145 million, or $1.13 per diluted share, on net sales of $1,932 million. Net income in the first quarter of 2020 increased by $73 million compared to first quarter 2019 net income of $72 million, or $0.55 per diluted share, on net sales of $2,025 million. The increase in net income was primarily due to the income tax rate benefit of $62 million, or $0.48 per diluted share, resulting from the carryback of federal net operating losses, as permitted under the CARES Act enacted in March 2020. Income from operations of $136 million for the first quarter of 2020 increased by $2 million from income from operations of $134 million for

Maintained quarterly distribution of $0.4714 per unit May 4, 2020- Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership of $17.7 million, or $0.50 per limited partner unit, for the three months ended March 31, 2020, an increase of $2.7 million compared to first quarter 2019 net income attributable to the Partnership of $15.0 million. The increase in net income attributable to the Partnership was primarily due to the increased production at Westlake Chemical OpCo LP ("OpCo") and higher third party sales margins. Cash flows from operating activities in the first quarter of 2020 were $111.0 million, a decrease of $2.5 million compared to first quarter 2019 cash flows from operating activities of $113.5 million. This decrease in cash flows from operating activities was primarily attributable to an increase in working capital. For the three months ended March 31, 2020, MLP distributable cash flow of $18.3 million increased

May 15, 2020- Westlake Chemical Corporation (NYSE: WLK) today announced that Ms. Kimberly S. Lubel has been elected to serve on the company’s board of directors as a new member. Ms. Lubel was elected to serve a three-year term at the company’s Annual Meeting of Stockholders, held today. Ms. Lubel is the former chairman, president and chief executive officer of CST Brands, Inc., and a former senior executive of Valero Energy Corporation. Additionally, the corporation announced that Mr. Max L. Lukens, who has served on the board for 16 years, has retired effective today. As previously disclosed, Mr. Lukens had decided not to stand for re-election and to retire upon the completion of his term at today’s Annual Meeting. In March 2020, Mr. Lukens also retired from the board of directors of Westlake Chemical Partners GP LLC, the general partner of the affiliated master limited partnership, Westlake Chemical Partners LP, when Mr. G. Stephen Finley was appointed as his replacement. “We are

$0.2625 cents per share dividend declared payable on June 9, 2020 May 15, 2020- The Board of Directors of Westlake Chemical Corporation (NYSE:WLK) declared today a regular dividend distribution of $0.2625 per share for the first quarter of 2020. This dividend will be payable on June 9, 2020, to stockholders of record on May 26, 2020. This is the 63rd successive quarterly dividend that Westlake has declared since completing its initial public offering in August 2004. About Westlake Chemical Corporation Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, we provide the building blocks for vital solutions — from packaging and healthcare products to automotive and consumer goods, to building and construction products. 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/20200515005554/en/ Media Inquiries:

Jun. 9, 2020- Westlake Chemical Corporation (NYSE: WLK) (“Westlake”) announced today the commencement of an underwritten public offering, subject to market and other conditions, of senior unsecured notes (the “Notes”) under its existing shelf registration statement. The timing of pricing and terms of the Notes are subject to market conditions and other factors. Westlake intends to use a portion of the net proceeds from the proposed public offering of the Notes to fund the purchase in lieu of redemption later this year of three series of tax-exempt revenue bonds (the “Revenue Bonds”) issued by the Louisiana Local Government Environmental Facilities and Community Development Authority (the “Authority”) on behalf of Westlake with an aggregate principal amount of $254,000,000, and, as a result thereof, cancel and retire all $100,000,000 of Westlake’s 6 1/2% Senior Notes due August 1, 2029 (the “2029 Notes”) and all $154,000,000 of Westlake’s 6 1/2% Senior Notes due November 1, 2035 (the