Focusing just on the companies with the most employees would mean the U.S. would become a retail nation, since that's the industry with the most head count. It

Focusing just on the companies with the most employees would mean the U.S. would become a retail nation, since that's the industry with the most head count. It isn't the best metric to measure by, since companies can also redistribute their revenue locally through capex, investments, services, and other costs.