As of October 2026 LyondellBasell has a market cap of NZ$34.58 Billion. This makes LyondellBasell the world's 1182th 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 Oct 11th, 2026 the market cap of LyondellBasell was reported to be: