Enterprise Holdings, Inc. is a private holding company headquartered in the Clayton suburb of St. Louis, Missouri, United States. It is the parent company of car rental companies Enterprise Rent-A-Car, National Car Rental, Alamo Rent a Car, and Enterprise CarShare.

 

The holding company was formed in 2009 as a result of Enterprise Rent-A-Car's 2007 acquisition of Vanguard Automotive Group, the parent company of National Car Rental and Alamo Rent a Car. 

Enterprise Holdings is the largest car rental company in the world as measured by revenue and fleet. 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.

According to en.wikipedia & linkedin.com