The National Car Rental brand is owned by St. Louis-based Enterprise Holdings, a privately held company which, through its regional subsidiaries, also owns and operates the Alamo Rent A Car and Enterprise Rent-A-Car brands.;Enterprise Holdings, through its regional subsidiaries, operates the largest fleet of vehicles in the world through a global network of nearly 8,600 airport and neighborhood locations under the Enterprise Rent-A-Car, National Car Rental, and Alamo Rent A Car brands. Enterprise Holdings is the largest car rental company in the world as measured by revenue, fleet, and employees. Enterprise Holdings’ annual revenues also place it near the top of the travel industry, exceeding all other rental car companies, and most airlines, cruise lines, hotels, tour operators and online travel agencies.