As of January 2026 Diageo has a market cap of โน4.587 Trillion. This makes Diageo the world's 472th 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 Jan 14th, 2026 the market cap of Diageo was reported to be: