| Player | From | Fee | Date |
|---|---|---|---|
| Ludwig Helmut | Free Agent | Free | 23.08.2027 |
| Scholz Stefan | Free Agent | Free | 23.08.2027 |
| Peters Leon | Free Agent | Free | 23.08.2027 |
| Friedrich Leon | Free Agent | Free | 23.08.2027 |
| Schröder Peter | Free Agent | Free | 23.08.2027 |
| Gyökeres Viktor | Arsenal | 58.4M | 28.08.2027 |
| Smit Kees | AZ | 37.5M | 29.08.2027 |
| Claude-Maurice Alexis | FC Augsburg | 16.9M | 07.01.2028 |
| Ugalde Manfred | Benfica | 33.5M | 13.01.2028 |
| Kamara Boubacar | Aston Villa | 110.6M | 21.01.2028 |
| Desábato Andrés | Free Agent | Free | 02.02.2028 |
| Player | To | Fee | Date |
|---|---|---|---|
| Hendriks Ramon | Hannover 96 | 9.0M | 27.08.2027 |
| Jeltsch Finn | RB Leipzig | Free | 01.09.2027 |
| Keitel Yannik | Borussia Dortmund | 3.9M | 09.01.2028 |
| Seimen Dennis | Hertha BSC | 5.5M | 17.01.2028 |
| Labrović Nediljko | Eintracht Frankfurt | 8.0M | 29.01.2028 |
| Vagnoman Josha | Schalke 04 | Free | 01.02.2028 |
| Sauer Leo | Free Agent | Free | 01.02.2028 |
| Arévalo Jeremy | Free Agent | Free | 01.02.2028 |
| Bergmann Kevin | Free Agent | Free | 01.02.2028 |
| Voigt Stefan | Free Agent | Free | 01.02.2028 |
| Player | To | Date | End Date |
|---|---|---|---|
| Al-Dakhil Ameen | Dynamo Dresden | 06.01.2028 | 05.05.2028 |
| El Mala Saïd | SC Freiburg | 12.01.2028 | 11.05.2028 |
| El Khannouss Bilal | Fortuna Düsseldorf | 27.01.2028 | 26.04.2028 |
| Müller Marius | VfL Bochum | 28.01.2028 | 27.04.2028 |