Deutsche Bank swung to a loss in the third quarter because of higher legal costs to settle investigations.
Germany’s largest lender posted a net loss of €92m in the three months to September, compared to a profit of €51m last year.
This comes after the firm set aside €894m to cover legal costs.
Its also announced chief financial officer Stefan Krause will be replaced by a top banker at rival Goldman Sachs.
Marcus Schenck, a Goldman Sachs partner and former chief financial officer of German utility E.ON SE, is set to take over from Krause next year.
Krause will remain on Deutsche’s board but move to become the head of strategy and oversee the bank’s cost-cutting programme.