Westlake Chemical Partners (NYSE: WLKP) will release its third quarter earnings for 2021 prior to the market opening on Tuesday, November 2, 2021. The company will host a conference call at 12:00 p.m. Eastern Time (11:00 a.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 8285407. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/9ssoi6jp 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 8285407. About Westlake Chemical Partners: Westlake Chemical

Westlake Chemical Corporation (NYSE: WLK) will release its third quarter earnings for 2021 prior to the market opening on Tuesday, November 2, 2021. 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 2495584. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/k7sddqsx 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 2495584. About Westlake: Westlake is a global manufacturer and supplier of

Westlake Chemical Partners (NYSE: WLKP) will release its third quarter earnings for 2021 prior to the market opening on Tuesday, November 2, 2021. The company will host a conference call at 12:00 p.m. Eastern Time (11:00 a.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 8285407. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/9ssoi6jp 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 8285407. About Westlake Chemical Partners: Westlake Chemical

Westlake Innovations, Inc., a subsidiary of Westlake Chemical Corporation (NYSE: WLK), and Nexii Building Solutions Inc. ( Nexii ) today announced that the companies have formed an alliance to support the construction of buildings with a reduced environmental footprint. Also, Westlake will be the preferred supplier of certain building materials it makes for Nexii residential construction, including siding, stone, roof tiles, trim and molding, pipe and fittings. Nexii is a green construction technology company that designs and manufactures high-performance buildings and building products that are sustainable, cost-efficient and resilient in the face of climate change. Westlake is a global manufacturer and supplier of building products and infrastructure materials that enhance life every day. The alliance with Nexii supports Westlake’s longstanding commitment to sustainability and stewardship of the environment. In addition to the Nexii alliance, Westlake recently completed its

Company completes acquisition of Boral Limited’s North American building products businesses for $2.15 billion Adds leading brands in premium roofing; siding, trim and shutters; decorative stone; and windows Additional product lines will broaden Westlake’s footprint into the fast-growing housing and light commercial markets in North America Combination brings opportunity to offer more sustainable products to housing materials market Westlake Chemical Corporation (NYSE: WLK) today announced that it has completed the acquisition of Boral Limited’s North American building products businesses in roofing; siding, trim and shutters; decorative stone; and windows for $2.15 billion in an all-cash transaction. “This transaction effectively doubles the size of our portfolio in the high-growth North American building products segment,” said Westlake President and Chief Executive Officer Albert Chao. “The North American building products segment, based on market analysis for new construction and

Expanded board-level Corporate Risk and Sustainability Committee Creating a new executive leadership role, Vice President - Sustainability Initiates materiality assessments for ESG framework Committed to innovative new products for a more sustainable future Westlake Chemical Corporation (NYSE: WLK) today released its 2020 Environmental, Sustainability and Governance (ESG) report, Essential Products, Critical Innovations , the fourth annual report demonstrating the company’s commitment to continuous improvements in its operations, products, management and communities. The report highlights include reductions in emissions; zero loss of plastic powder, pellet or flake from operations; an improved safety record; a diversity action plan; and increased charitable contributions in our communities amid the pandemic and extreme weather events. The report demonstrates the resilience and resolve of Westlake to responsibly operate and safeguard its employees regardless of challenges, including

Westlake Chemical Corporation (NYSE: WLK) today announced that it has contributed $250,000 to the Capital Area United Way’s Hurricane Ida Relief Fund in Baton Rouge, Louisiana. The Hurricane Ida Relief Fund was established to aid storm victims in the 10 parishes surrounding greater Baton Rouge. “As a long-time member of the greater Baton Rouge community, home to approximately 1,000 of our Louisiana employees and core contractors, who work at our plants in Ascension and Iberville parishes, we are saddened by the many residents in the area who have been affected by Hurricane Ida,” said Westlake President and Chief Executive Officer Albert Chao. “We are thankful for the support of organizations like the United Way in this time of great need.” In addition to this financial contribution, Westlake has been assisting its employees and their families, many of whom have suffered damage to their homes and have been without power. About Westlake Westlake is a global manufacturer and supplier of

Company expands its building products business with a leading recycled plastic materials processor Acquisition supports Westlake’s growth trajectory and meeting its ESG commitments Westlake Chemical Corporation (NYSE: WLK) today announced that it has completed the acquisition of Dimex LLC, from Grey Mountain Partners, a private equity firm. “The acquisition of Dimex underscores our longstanding commitment to stewardship of the environment and recycling, and to taking actions that contribute to a sustainable, circular economy,” said Robert Buesinger, Executive Vice President, Vinyl Products of Westlake Chemical Corporation. “We are at an important societal inflection point where consumers prefer and are willing to pay for products made with recyclable materials. Dimex produces a variety of consumer products made from post-industrial-recycled polyvinyl chloride, polyethylene and thermoplastic elastomer materials, which will make this transaction an important piece of Westlake’s growth