Carnival Corporation & PLC (NYSE: CCL, LSE: CCL, and NYSE: CUK), is a British-American-Panamanian corporation, and the world's largest cruise ship operator. It is a dual listed company, with headquarters at Carnival Place in the Doral suburb of Miami, Florida, USA and at Carnival House in Southampton, England, UK. Carnival Corporation and Carnival plc are separate listed companies and have different shareholder bodies, but they jointly own all the operating companies in the group.

Carnival Corporation owns the majority stake, however as a condition of the merger between Carnival Corporation and P&O Princess Cruises PLC in 2002, it was agreed that P&O Princess would be relisted as Carnival PLC in London, remaining as a separate company with a predominantly British shareholder body and largely retaining the P&O Princess executive team.

Carnival Corporation and Carnival PLC stocks are currently traded on the London Stock Exchange (LSE: CCL) and the New York Stock Exchange (NYSE: CUK and NYSE: CCL)

Source: Wikipedia