For the town in France, see Sixt-Fer-à-Cheval.Sixt (Sixt SE) is an international car rental company with over 2,000 locations in over 100 different countries. Sixt SE acts as a parent and holding company of the Sixt Group, which is internationally active in the business areas of vehicle rental and leasing. The majority of the company (60%) is owned by the Sixt family. The remaining share is tradeable stock: SIX2 (XETRA).