| Player | From | Fee | Date |
|---|---|---|---|
| Fischer Uwe | Academy | Free | 23.08.2027 |
| Ichihara Rion | Free Agent | Free | 12.09.2027 |
| Osipov Alexandr | Free Agent | Free | 08.10.2027 |
| Onyango Tyler | Free Agent | Free | 11.11.2027 |
| Blanco Cristián | Free Agent | Free | 01.01.2028 |
| Friedrich Marvin | Free Agent | Free | 06.01.2028 |
| Hyun-Seok Hong | Mainz 05 | 5.5M | 07.01.2028 |
| Hollerbach Benedict | Werder Bremen | 37.8M | 08.01.2028 |
| Nsoki Stanley | Union Berlin | 9.3M | 13.01.2028 |
| Chaves Arthur | TSG Hoffenheim | 8.3M | 16.01.2028 |
| Abergel Laurent | Free Agent | Free | 18.01.2028 |
| Wieckhoff Jannes | Free Agent | Free | 01.02.2028 |
| Fannar Baldursson Andri | Free Agent | Free | 05.07.2028 |
| Player | To | Fee | Date |
|---|---|---|---|
| Ziegler Uwe | Free Agent | Free | 09.08.2027 |
| Rogério | Free Agent | Free | 05.06.2028 |
| Assignon Lorenz | Free Agent | Free | 10.07.2028 |
| Player | To | Date | End Date |
|---|---|---|---|
| Jaquez Luca | RB Leipzig | 07.01.2028 | 02.11.2028 |
| Zagadou Dan-Axel | Borussia Dortmund | 18.06.2028 | 14.04.2029 |
| Sauer Leo | RB Leipzig | 04.07.2028 | 30.04.2029 |
| Ćatović Mirza | Vasas | 02.09.2027 | 29.05.2028 |