The Fortune 1000 is an annual list published by Fortune magazine that ranks the 1,000 largest U.S. companies by total revenue. This list includes both publicly traded and privately held companies, providing a comprehensive overview of the American business landscape. The Fortune 1000 serves as a valuable resource for investors, analysts, and business professionals, highlighting key players in various industries. It reflects economic trends and helps identify leading companies that drive growth and innovation in the U.S. economy.