As of December 2025 American Water has a market cap of ยฃ18.77 Billion. This makes American Water the world's 919th 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 American Water was reported to be: