Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2026 |  | Dylan Leonard | DF |  | FC Schalke 04 | Schalke |
| 09/2026 |  | Jonas Oehmichen | MF |  | Dynamo Dresden | Dresden |
| 08/2026 | | Justin von der Hitz | DF |  | 1. FC Nuremberg | Nuremberg |
| 08/2026 | | Kacper Koscierski | DF |  | VfL Bochum | Bochum |
| 08/2026 |  | Nathan Bitumazala | FW |  | KAS Eupen | KAS Eupen |
| 08/2026 |  | Georg Ermolaev | FW |  | SC Paderborn 07 II | SC Paderborn 07 II |
| 07/2026 | | Meiko Wäschenbach | MF |  | Karlsruher SC | Karlsruhe |
| 07/2026 | | Ken Izekor | FW |  | Bayer Leverkusen II | Leverkusen II |
| 07/2026 | | Stefan Bajić | GK |  | Racing Strasbourg | Strasbourg |
| 07/2026 | | Louis Köster | MF | | VfL Bochum | Bochum |
| 07/2026 | | Daniel Starodid | FW |  | Eintracht Frankfurt II | Frankfurt II |
| 07/2026 |  | Amer Mujicic | AS-CO | |||
| 07/2026 |  | Amine Abouer-Raja | AT-C |  | 1. FC Köln U17 | Köln U17 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2026 |  | Faton Ademi | MF |  | SpVgg Greuther Fürth | Gr. Fürth |
| 08/2026 | | Florian Heister | DF |  | Fortuna Köln | Fortuna Köln |
| 07/2026 | | Marc Richter | MF |  | TSV Havelse | TSV Havelse |
| 07/2026 |  | Kwasi Wriedt | FW | | TSV Havelse | TSV Havelse |
| 07/2026 | | Nils Winter | DF |  | Rot-Weiß Oberhausen | Oberhausen |
| 07/2026 |  | Fotis Pseftis | GK |  | FC Lugano | FC Lugano |
| 07/2026 | | Jeremias Lorch | DF |  | SGV Heilbronn-Freiberg | SGV Freiberg |
| 07/2026 | | Felix Meyer | DF |  | FC Schalke 04 II | Schalke II |
| 07/2026 |  | Pierre Nadjombe | DF |  | 1. FC Magdeburg | Magdeburg |
| 07/2026 | | Lamar Yarbrough | DF |  | Dila Gori | Dila Gori |
| 07/2026 | | Niklas Castelle | MF |  | Viktoria Köln | Vikt. Köln |
| 07/2026 | | Gianluca Gaudino | MF |  | VfR Aalen | VfR Aalen |
| 07/2026 | | Lars Gindorf | MF |  | Hannover 96 | Hannover |
| 07/2026 | | Jonas Oehmichen | MF | | Dynamo Dresden | Dresden |
| 07/2026 | | Emmanuel Elekwa | FW |  | SG Barockstadt Fulda-Lehnerz | SG Barockstadt |
| 07/2026 | | Omar Sillah | FW | | SpVgg Greuther Fürth | Gr. Fürth |