As of December 2025 Diageo has a market cap of ยฃ35.74 Billion. This makes Diageo the world's 478th 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 9th, 2025 the market cap of Diageo was reported to be: