New signings

• Orel Mangala (RSC Anderlecht)
• Anastasios Donis (Juventus Turin)
• Chadrac Akolo (FC Sion)
• Dzenis Burnic (Borussia Dortmund, on loan)
• Ron-Robert Zieler (Leicester City)
• Ailton Ferreira Silva (GD Estoril Praia)
• Holger Badstuber
• Dennis Aogo
• Santiago Ascacibar (Estudiantes de La Plata)
• Alexander Meyer (FC Energie Cottbus)
• Andreas Beck (Besiktas Istanbul)
• Mario Gomez (VfL Wolfsburg, January 2018)
• Erik Thommy (FC Augsburg, January 2018)
• Jacob Bruun Larsen (Borussia Dortmund, on loan, January 2018)

Departures

• Florian Klein (FK Austria Wien)
• Toni Sunjic (FC Dynamo Moscow)
• Benjamin Uphoff (Karlsruher SC)
• Alexandru Maxim (1. FSV Mainz 05)
• Jean Zimmer (Fortuna Düsseldorf, on loan)
• Tobias Werner (1. FC Nürnberg, on loan)
• Mitch Langerak (Levante UD)
• Julian Green (SpVgg Greuther Fürth, on loan)
• Jérôme Onguéné (FC Red Bull Salzburg, on loan)
• Hans Nunoo Sarpei (FK Senica, on loan)
• Simon Terodde (1. FC Köln, January 2018)
• Josip Brekalo (VfL Wolfsburg, end of the loan, January 2018)
• Anto Grgic (FC Sion, on loan, January 2018)
• Ailton Ferreira Silva (GD Estoril, on loan, January 2018)
• Ebenezer Ofori (New York City FC, on loan, February 2018)