Carnival Corporation & plc is a British-American cruise operator, currently the world's 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, Panama-incorporated US-headquartered Carnival Corporation and UK-based Carnival plc, which function as one entity. Carnival Corporation is listed on the New York Stock Exchange and Carnival plc is listed on the London Stock Exchange. Carnival is listed in both the S&P 500 and FTSE 250 indices.