Carnival Corporation & plc ("Carnival") is an American-British cruise company and the worlds largest travel leisure company, with a combined fleet of over 100 vessels across 10 cruise line brands. A dual listed company, Carnival is composed of two companies, Carnival Corporation and Carnival plc, which are combined and function as one entity, effectively being a general partnership between its two component public corporations, listed on the New York Stock Exchange and London Stock Exchange respectively. As such, Carnival is the only company in the world to be listed on both the S&P 500 and FTSE 100 indices. Carnival Corporations global headquarters is located in Miami, Florida, in the United States, with UK headquarters at Southampton, Hampshire, and with regional offices in Australia, Germany and Italy. Carnival Corporation & plc was formed in 2003, with the acquisition by Carnival Corporation of P&O Princess Cruises. Carnival Corporation was originally founded as Carnival Cruise Line in 1972. The company grew steadily throughout the 1970s and 1980s, making an initial public offering on the New York Stock Exchange in 1987. The capital generated was used to finance acquisitions, and between 1989 and 1999, the company acquired Holland America Line, Windstar Cruises, Westours, Seabourn Cruise Line, Costa Cruises and Cunard Line. The name Carnival Corporation was adopted in 1993, to distinguish the parent company from its flagship cruise line subsidiary.