As of April 2026 National Grid has a market cap of A$120.03 Billion. This makes National Grid the world's 272th 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 Apr 28th, 2026 the market cap of National Grid was reported to be: