Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2026 |  | Rayan Philippe | FW |  | Hamburger SV | Hamburg |
| 08/2026 |  | Marvin Pieringer | FW |  | 1. FC Heidenheim 1846 | Heidenheim |
| 08/2026 |  | Gabriel Vidović | FW |  | Dinamo Zagreb | Din. Zagreb |
| 08/2026 | | Laurin Ulrich | MF |  | VfB Stuttgart | Stuttgart |
| 08/2026 | | Deniz Zeitler | FW |  | TSG Hoffenheim | Hoffenheim |
| 07/2026 | | Nahuel Noll | GK |  | Hannover 96 | Hannover |
| 07/2026 | | Nyamekye Awortwie-Grant | DF |  | Energie Cottbus | Cottbus |
| 07/2026 | | Martin Ens | DF |  | SC Verl | Verl |
| 07/2026 | | Clemens Lippmann | DF |  | 1860 Munich | 1860 Munich |
| 07/2026 | | Jano ter Horst | DF |  | Preußen Münster | Pr. Münster |
| 07/2026 | | Tristan Zobel | DF |  | Erzgebirge Aue | Aue |
| 07/2026 | | Tom Baack | MF |  | 1. FC Nuremberg | Nuremberg |
| 07/2026 | | Oliver Batista-Meier | MF | | Preußen Münster | Pr. Münster |
| 07/2026 |  | Luka Đurić | MF | | TSG Hoffenheim | Hoffenheim |
| 07/2026 | | Timur Gayret | MF | | SC Verl | Verl |
| 07/2026 | | Lasse Eickel | FW |  | SC Paderborn 07 II | SC Paderborn 07 II |
| 07/2026 | | Albert Millgramm | FW |  | 1. FC Magdeburg | Magdeburg |
| 07/2026 | | Marco Wörner | FW | | SC Verl | Verl |
| 07/2026 | | Andreas Ludwig | IN-C |  | SSV Ulm 1846 U17 | Ulm U17 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2026 | | Kennedy Okpala | FW |  | Dynamo Dresden | Dresden |
| 08/2026 | | Nick Bätzner | MF |  | Rot-Weiss Essen | RW Essen |
| 08/2026 | | Mika Baur | FW |  | Celtic FC | Celtic |
| 07/2026 | | David Kinsombi | MF |  | Würzburger Kickers | Würzburg |
| 07/2026 | | Filip Bilbija | FW |  | Derby County | Derby |
| 07/2026 | | Martin Ens | DF |  | MSV Duisburg | Duisburg |
| 07/2026 | | Marco Wörner | FW |  | Jahn Regensburg | Regensburg |
| 07/2026 | | Bennit Bröger | MF |  | Fortuna Köln | Fortuna Köln |
| 07/2026 | | Lucas Copado | FW | | Energie Cottbus | Cottbus |
| 07/2026 | | Dennis Seimen | GK | | VfB Stuttgart | Stuttgart |
| 07/2026 | | Anton Bäuerle | DF |  | 1. FC Saarbrücken | Saarbrücken |
| 07/2026 | | Calvin Brackelmann | DF |  | FC Augsburg | Augsburg |
| 07/2026 | | Kevin Krumme | DF | | Fortuna Köln | Fortuna Köln |
| 07/2026 | | Kerem Yalcin | MF |  | Rot-Weiß Oberhausen | Oberhausen |