Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2026 |  | Tom Steineck | MF |  | SV Darmstadt 98 U19 | SV Darmstadt 98 U19 |
| 09/2026 | | Marco Richter | MF | |||
| 08/2026 |  | William Mikelbrencis | DF | |||
| 08/2026 |  | Milan Smit | FW |  | Stoke City | Stoke City |
| 07/2026 |  | Ho-jae Lee | FW |  | Pohang Steelers | Pohang Steelers |
| 07/2026 | | Carlo Sickinger | MF |  | SV 07 Elversberg | Elversberg |
| 07/2026 | | Christopher Lannert | DF |  | Arminia Bielefeld | Bielefeld |
| 07/2026 | | Florian Kleinhansl | DF |  | 1. FC Kaiserslautern | K'lautern |
| 07/2026 |  | Meldin Drešković | DF |  | Nyíregyháza Spartacus | Nyíregyháza |
| 07/2026 |  | Leon Klassen | DF |  | Grazer AK | Grazer AK |
| 07/2026 | | Yannik Lührs | DF |  | TSG Hoffenheim II | Hoffenheim II |
| 07/2026 | | Lance Duijvestijn | MF |  | Fortuna Sittard | Fortuna Sittard |
| 07/2026 | | Milian Herbst | MF |  | SV Darmstadt 98 II | Darmstadt 98 II |
| 07/2026 | | Lars Kehl | MF |  | VfL Osnabrück | Osnabrück |
| 07/2026 |  | Nicolas Verkooijen | MF |  | PSV Eindhoven U19 | Eindhoven U19 |
| 07/2026 | | Paul Will | MF |  | SpVgg Greuther Fürth | Gr. Fürth |
| 07/2026 | | Ibrahim El Kadiri | FW |  | De Graafschap | De Graafs. |
| 07/2026 | | Manolo Merx | FW | | SV Darmstadt 98 U19 | SV Darmstadt 98 U19 |
| 07/2026 | | Noah Weißhaupt | FW |  | Hannover 96 | Hannover |
| 07/2026 | | Felix Forster | AT-C | |||
| 07/2026 | | Rafael Ramos-Gameiro | G-AN |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2026 |  | Matej Maglica | DF |  | Kocaelispor | Kocaelispor |
| 08/2026 |  | Bartosz Białek | FW |  | Wieczysta Kraków | Wieczysta Kraków |
| 07/2026 |  | Sergio López | DF |  | Granada CF | Granada CF |
| 07/2026 | | Killian Corredor | FW |  | FC Nantes | FC Nantes |
| 07/2026 | | Leon Klassen | DF | | Grazer AK | Grazer AK |
| 07/2026 | | Paul Will | MF | | SpVgg Greuther Fürth | Gr. Fürth |
| 07/2026 | | Tim Arnold | DF |  | Sportfreunde Siegen | Siegen |
| 07/2026 | | Fabian Holland | DF |  | SV Hummetroth | SV Hummetroth |
| 07/2026 | | Max Pfister | DF | | SV Darmstadt 98 II | Darmstadt 98 II |
| 07/2026 | | Marco Richter | MF |  | 1. FSV Mainz 05 | Mainz 05 |
| 07/2026 | | Niklas Schmidt | MF |  | Toulouse FC | Toulouse |
| 07/2026 | | Serhat-Semih Güler | FW | | Sportfreunde Siegen | Siegen |
| 07/2026 |  | Fraser Hornby | FW |  | VfL Wolfsburg | Wolfsburg |
| 07/2026 |  | Isac Lidberg | FW |  | Bor. Mönchengladbach | M'gladbach |