As of May 2026 Phillips 66 has a market cap of โน6.944 Trillion. This makes Phillips 66 the world's 335th 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 Phillips 66 was reported to be: