Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 29.01.2026 | M. LjubiÄiÄ | Union Berlin | Fortuna Düsseldorf | Loan |
| 02.01.2026 | Oluwaseun God Power Osaro Ogbemudia | Union Berlin | — | Loan |
| 31.12.2025 | M. Torrejon | Union Berlin | — | - |
| 27.11.2025 | J. Roussillon | Union Berlin | — | Free agent |
| 01.09.2025 | L. Tousart | Union Berlin | Stade Brestois 29 | Transfer |
| 31.08.2025 | L. Tousart | Union Berlin | Stade Brestois 29 | - |
| 31.08.2025 | A. Schwolow | Union Berlin | Heart Of Midlothian | Free Transfer |
| 31.08.2025 | Y. Stein | Union Berlin | — | Loan |
| 30.08.2025 | Y. Stein | Union Berlin | — | Loan |
| 30.08.2025 | L. Tousart | Union Berlin | Stade Brestois 29 | - |
| 30.08.2025 | A. Schwolow | Union Berlin | Heart Of Midlothian | Free agent |
| 19.08.2025 | D. Köhn | Galatasaray | Union Berlin | Transfer |
| 18.08.2025 | D. Köhn | Galatasaray | Union Berlin | Transfer |
| 16.08.2025 | L. Bénes | Union Berlin | Kayserispor | Loan |
| 15.08.2025 | L. Bénes | Union Berlin | Kayserispor | Loan |
| 12.08.2025 | Dmytro Bohdanov | — | Union Berlin | Transfer |
| 11.08.2025 | Dmytro Bohdanov | — | Union Berlin | Transfer |
| 24.07.2025 | S. Nsoki | 1899 Hoffenheim | Union Berlin | Loan |
| 23.07.2025 | S. Nsoki | 1899 Hoffenheim | Union Berlin | Loan |
| 18.07.2025 | S. Ali | — | Union Berlin | - |
| 18.07.2025 | S. Ali | — | Union Berlin | - |
| 15.07.2025 | P. Jaeckel | Union Berlin | — | Transfer |
| 14.07.2025 | P. Jaeckel | Union Berlin | — | Transfer |
| 13.07.2025 | P. Jaeckel | Union Berlin | — | Transfer |
| 11.07.2025 | M. Raab | Hamburger SV | Union Berlin | Transfer |
| 10.07.2025 | M. Raab | Hamburger SV | Union Berlin | Transfer |
| 08.07.2025 | L. Grill | Union Berlin | — | Transfer |
| 07.07.2025 | L. Grill | Union Berlin | — | Transfer |
| 07.07.2025 | K. Vogt | Union Berlin | VfL Bochum | Transfer |
| 06.07.2025 | K. Vogt | Union Berlin | VfL Bochum | Transfer |
| 05.07.2025 | K. Vogt | Union Berlin | VfL Bochum | Transfer |
| 01.07.2025 | R. Gosens | Fiorentina | Union Berlin | N/A |
| 01.07.2025 | R. Gosens | Union Berlin | Fiorentina | Transfer |
| 01.07.2025 | K. Volland | Union Berlin | — | Free |
| 01.07.2025 | Livan Burcu | — | Union Berlin | Back from Loan |
| 01.07.2025 | A. Ilić | Union Berlin | Lille | N/A |
| 01.07.2025 | A. Ilić | Lille | Union Berlin | Transfer |
| 01.07.2025 | A. Král | Espanyol | Union Berlin | Back from Loan |
| 01.07.2025 | P. Jaeckel | — | Union Berlin | N/A |
| 01.07.2025 | Jeong Woo-Yeong | Union Berlin | Union Berlin | Transfer |
| 01.07.2025 | A. Král | — | Union Berlin | Back from Loan |
| 01.07.2025 | Y. Stein | — | Union Berlin | Back from Loan |
| 01.07.2025 | O. Burke | Werder Bremen | Union Berlin | Free Transfer |
| 01.07.2025 | I. Prtajin | Union Berlin | — | Transfer |
| 01.07.2025 | L. Grill | — | Union Berlin | N/A |
| 30.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 30.06.2025 | Jeong Woo-Yeong | VfB Stuttgart | Union Berlin | Transfer |
| 30.06.2025 | Andrik Markgraf | Union Berlin | Union Berlin | Free agent |
| 30.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 30.06.2025 | I. Prtajin | Union Berlin | — | Transfer |