Strong fourth quarter coverage ratio of 1.13x following the completion of the Petro 1 turnaround Declared quarterly distribution of $0.4714 per unit; 46 th consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the fourth quarter of 2025 of $14.5 million, or $0.41 per limited partner unit, which was relatively in line with fourth quarter 2024 net income of $15.0 million. Cash flows from operating activities in the fourth quarter of 2025 were $120.4 million, a decrease of $12.1 million compared to fourth quarter 2024 cash flows from operating activities of $132.5 million, due to lower net income and less favorable working capital changes. For the three months ended December 31, 2025, MLP distributable cash flow was $18.8 million providing a quarterly coverage ratio of 1.13x. The increase in MLP distributable cash flow of $3.8 million compared to the fourth quarter of 2024 was

Westlake Corporation (NYSE: WLK) announced that Mr. Bhavesh V. “Bob” Patel and Mr. Jean-Marc Gilson, the President and Chief Executive Officer of the Company, have been elected to the company’s board of directors, effective February 20, 2026. “We are very pleased to welcome Bob to our board,” said Westlake Corporation Executive Chairman Albert Chao. “He brings a wealth of experience and in-depth knowledge of the chemicals and building materials industries and adds to the already deep expertise our board has in this area. We are also pleased to welcome Jean-Marc to the board in recognition of his continued leadership of the company. His presence on the board is expected to further enhance communication and strategic alignment between management and the board.” Mr. Patel, age 59, served as President of Standard Industries until June 2024, having been elevated to that role in April 2023 from W.R. Grace & Co., a Standard Industries subsidiary that he joined as Chief Executive Officer

$0.53 per share dividend declared payable on March 18, 2026 The Board of Directors of Westlake Corporation (NYSE: WLK) today declared a regular dividend distribution of $0.53 per share for the fourth quarter of 2025. This dividend will be payable on March 18, 2026 to stockholders of record on March 3, 2026. Westlake announced its first dividend on November 11, 2004 and has successively been paying and increasing its dividend for the past 22 years. The statements in this release that are not historical facts, including statements regarding future payment of dividend, are forward-looking statements. These forward-looking statements are subject to significant risks and uncertainties. For more detailed information about the factors that could cause actual results to differ materially, please refer to Westlake’s Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the SEC in February 2025, and Westlake’s Quarterly Report on Form 10-Q for the quarter ended

Westlake Corporation (NYSE: WLK) today announced that Westlake Epoxy will expand its long‑standing distribution relationship with Brenntag to South and West India. The agreement builds on a successful collaboration across Europe, North and South America, and Southeast Asia, extending Westlake Epoxy’s reach into one of the world’s fastest‑growing coatings, adhesives and construction markets. Under the expanded collaboration, Brenntag will distribute Westlake Epoxy’s established portfolio of epoxy solutions for coatings, adhesives and construction applications, including the EPON™, EPIKOTE™, EPIKURE™ and EPI‑REZ™ product lines. Customers are expected to benefit from reliable local supply, technical service and application‑focused formulation support tailored to regional requirements. India’s coatings, adhesives and construction sectors continue to grow, driven by infrastructure investment, urbanization and increasing performance expectations. By combining Westlake Epoxy’s proven epoxy