What is Market Capitalization ?
Market capitalization (market cap) is the market value at a point in time of the shares outstanding of a publicly traded company, being equal to the share price at that point of time times the number of shares outstanding. As outstanding stock is bought and sold in public markets, capitalization could be used as an indicator of public opinion of a company’s net worth and is a determining factor in some forms of stock valuation.
Amazon leads the top with Market Cap of $450 billion followed by Walmart.
You will find more statistics at Statista