As of May 2026 Westlake Corporation has a market cap of S$14.73 Billion. This makes Westlake Corporation the world's 1821th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On May 18th, 2026 the market cap of Westlake Corporation was reported to be: