The most valuable companies In the table above, 10 companies with the highest value were shown and we see that - is at the top of the list. The market value of which reached about 5.8 trillion dollars a few months ago, has dropped to less than 5,000 billion dollars. In recent weeks, the share prices of large technology companies in the United States have fallen sharply and their market value has decreased by hundreds of billions of dollars. Saudi Aramco is in eighth place.