Thomas Cook Group plc is a British global online/offline travel company created on 19 June 2007 by the merger of Thomas Cook AG and MyTravel Group plc. At flotation on the London Stock Exchange 52% of the shares in the new company were held by the German mail order and department store corporation Arcandor (former owners of Thomas Cook AG) and 48% owned by the shareholders of MyTravel. On 9 June 2009 Arcandor filed for bankruptcy.  The merger, which was backed by 99.9% of shareholders, took place through the formation of ‘NewCo’ which effectively purchased MyTravel and Thomas Cook and was then listed on the London Stock Exchange under the name of Thomas Cook Group plc (LSE: TCG).  It is a constituent of the FTSE SmallCap Index.

Info gleaned from Wikipedia