Hilton Worldwide Holdings, Inc. (formerly Hilton Hotels Corporation) is an American multinational hospitality company that manages and franchises a broad portfolio of hotels and resorts. Founded by Conrad Hilton in 1919, the corporation is now led by Christopher J. Nassetta. Hilton Worldwide is headquartered in Tysons Corner, Virginia. As of October 2016, its portfolio includes 4,820 properties (including timeshare properties) with 788,864 rooms in more than 100 countries and territories \", making the corporation the largest hotel chain in the world by rooms and international presence. Prior to their December 2013 IPO, Hilton was ranked as the 36th largest privately held company in the United States by Forbes.