Isbank AG Deutschland | 5,784 followers on LinkedIn. İşbank AG was founded in 1992 as a wholly owned subsidiary of Türkiye İş Bankası A.Ş. and subsequently took over its parent company’s operations in Europe. İşbank AG is therefore now the European arm of Türkiye İş Bankası A.Ş. As one of the most well-respected and experienced Turkish banks headquartered in Germany, it plays a key role in implementing its parent company’s international expansion plans.