TUI Group (German: TUI (Touristik Union International) Aktiengesellschaft) is a multinational travel and tourism company headquartered in Hannover, Germany. It is the largest leisure, travel and tourism company in the world, and owns travel agencies, hotels, airlines, cruise ships and retail stores. The group owns six European airlines - the largest holiday fleet in Europe - and UK-based tour operator Thomson.
TUI is jointly listed on the Frankfurt Stock Exchange and the London Stock Exchange as a constituent of the FTSE 100 Index.
The origins of the company lie in the industrial and transportation company, Preussag AG, which was originally formed as a German mining company. It was incorporated on October 9, 1923, as Preußische Bergwerks- und Hütten-Aktiengesellschaft (Prussian Mine and Foundry Company). In 1927 it was merged with the Ruhr coal company, Hibernia AG, and electricity utility to become the Vereinigte Elekrizitäts und Bergwerks AG (VEBA AG) (United Electrical and Mining Company).