As of December 2025 American Water has a market cap of A$38.94 Billion. This makes American Water the world's 899th 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 American Water was reported to be: