As of December 2025 Phillips 66 has a market cap of โฌ44.35 Billion. This makes Phillips 66 the world's 450th 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 Dec 18th, 2025 the market cap of Phillips 66 was reported to be: