| Player | From | Fee | Date |
|---|---|---|---|
| Simon Jan | Free Agent | Free | 23.08.2027 |
| Neumann René | Free Agent | Free | 23.08.2027 |
| Meyer David | Free Agent | Free | 23.08.2027 |
| Voigt Philipp | Free Agent | Free | 23.08.2027 |
| Neumann Andreas | Free Agent | Free | 23.08.2027 |
| Alvarado Roberto | Pumas UNAM | 27.2M | 27.08.2027 |
| Ribeiro Rodrigo | FC Augsburg | 11.7M | 30.08.2027 |
| Veerman Joey | Borussia Dortmund | 28.7M | 01.07.2028 |
| Player | To | Fee | Date |
|---|---|---|---|
| Hranáč Robin | Free Agent | Free | 01.09.2027 |
| Poller Tiago | Free Agent | Free | 01.09.2027 |
| Schuster Lars | Free Agent | Free | 01.09.2027 |
| Schulze Richard | Free Agent | Free | 01.09.2027 |
| Yardımcı Erencan | Eintracht Frankfurt | 12.2M | 11.01.2028 |
| Kabak Ozan | Free Agent | Free | 01.02.2028 |
| Koch Jonas | Free Agent | Free | 01.02.2028 |
| Michel Sven | Free Agent | Free | 03.06.2028 |
| Philipp Luca | Fortuna Düsseldorf | 1.3M | 10.07.2028 |
| Player | From | Date | End Date |
|---|---|---|---|
| Nadir Bilal | Hamburger SV | 18.06.2028 | 14.04.2029 |
| Kabar Almugera | Borussia Dortmund | 08.07.2028 | 04.05.2029 |
| Player | To | Date | End Date |
|---|---|---|---|
| Smith Eric | Arminia Bielefeld | 31.08.2027 | 27.04.2028 |
| Noll Nahuel | Holstein Kiel | 08.01.2028 | 07.05.2028 |
| Engelns Luis | SC Freiburg | 07.06.2028 | 03.04.2029 |
| Amenyido Etienne | Karlsruher SC | 15.06.2028 | 11.04.2029 |
| Zeitler Deniz | Eintracht Frankfurt | 18.06.2028 | 14.04.2029 |
| Noll Nahuel | Köln | 01.07.2028 | 27.05.2029 |
| Ogundu Uchenna | Preußen Münster | 08.07.2028 | 04.05.2029 |
| Bernardo | Atlético Mineiro | 07.07.2028 | 03.05.2029 |