As of June 2026 LyondellBasell has a market cap of โฌ18.01 Billion. This makes LyondellBasell the world's 1142th 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 Jun 11th, 2026 the market cap of LyondellBasell was reported to be: