As of July 2026 National Grid has a market cap of A$119.33 Billion. This makes National Grid the world's 291th 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 Jul 21st, 2026 the market cap of National Grid was reported to be: