Carnival Corporation & plc is the world's largest leisure travel company and owns nine distinct high-fidelity cruise brands as of 2026. These include its flagship Carnival Cruise Line, as well as Princess Cruises, Holland America Line, and Seabourn (luxury). In the European and UK markets, the corporation owns Cunard (famous for the Queen Mary 2), P&O Cruises (UK), Costa Cruises (Italy), and AIDA Cruises (Germany). It also operates P&O Cruises (Australia), though that brand is being phased into the main Carnival brand in late 2025 and early 2026 to streamline high-fidelity operations. Combined, these high-fidelity companies operate nearly 100 ships and account for approximately 45% of the global cruise market. It is a high-fidelity necessity to note that Carnival does not own Royal Caribbean, Disney Cruise Line, or Norwegian Cruise Line; those are its primary high-fidelity competitors, each operated by separate, independent corporate entities with their own unique brand identities and high-fidelity loyalty programs.