23 January 2010 : Bundesliga Transfers Updated| Player | Position | From | To | Fee €m | |
| Contento | DF | Bayern Munich Amateurs | Bayern Munich | Free | |
| Luthe | GK | Contract Extension | Bochum | 2013 | |
| Maric | MF | Gent | Bochum | u/d | |
| Abdennour | DF | Etoile du Sahel | Bremen | Loan | |
| Clark | MF | Houston Dynamo | Frankfurt | Loan | |
| Szalai | FW | Real Madrid | Mainz | Loan | |
| Baumjohann | MF | Bayern Munich | Schalke | u/d | |
| Edu | FW | Out of contract | Schalke | Free | |
| Hoogland | DF | Mainz | Schalke | u/d | |
| Ibraimi | FW | Renova Dzepciste | Schalke | 0.50 | |
| Kluge | MF | Nurnberg | Schalke | u/d | |
| Molinardo | DF | Juventus | Stuttgart | Loan | |
| 0.50 | |||||
| u/d = undisclosed | |||||