Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 19.08.2025 | D. Köhn | Galatasaray | Union Berlin | Transfer |
| 18.08.2025 | D. Köhn | Galatasaray | Union Berlin | Transfer |
| 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 | - |
| 11.07.2025 | M. Raab | Hamburger SV | Union Berlin | Transfer |
| 10.07.2025 | M. Raab | Hamburger SV | Union Berlin | Transfer |
| 01.07.2025 | A. Král | — | Union Berlin | Back from Loan |
| 01.07.2025 | L. Grill | — | Union Berlin | N/A |
| 01.07.2025 | P. Jaeckel | — | Union Berlin | N/A |
| 01.07.2025 | R. Gosens | Fiorentina | Union Berlin | N/A |
| 01.07.2025 | Livan Burcu | — | Union Berlin | Back from Loan |
| 01.07.2025 | A. Ilić | Lille | Union Berlin | Transfer |
| 01.07.2025 | Jeong Woo-Yeong | Union Berlin | Union Berlin | Transfer |
| 01.07.2025 | Y. Stein | — | Union Berlin | Back from Loan |
| 01.07.2025 | O. Burke | Werder Bremen | Union Berlin | Free Transfer |
| 01.07.2025 | A. Král | Espanyol | Union Berlin | Back from Loan |
| 30.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 30.06.2025 | O. Burke | Werder Bremen | Union Berlin | Free agent |
| 30.06.2025 | Andrik Markgraf | Union Berlin | Union Berlin | Free agent |
| 30.06.2025 | Jeong Woo-Yeong | VfB Stuttgart | Union Berlin | Transfer |
| 30.06.2025 | A. Ilić | Lille | Union Berlin | Transfer |
| 29.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 29.06.2025 | L. Grill | — | Union Berlin | Return from loan |
| 29.06.2025 | P. Jaeckel | — | Union Berlin | Return from loan |
| 29.06.2025 | Livan Burcu | — | Union Berlin | Return from loan |
| 29.06.2025 | A. Král | Espanyol | Union Berlin | Return from loan |
| 29.06.2025 | Y. Stein | — | Union Berlin | Return from loan |
| 06.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 02.02.2025 | M. LjubiÄiÄ | Lask Linz | Union Berlin | Transfer |
| 30.08.2024 | A. Ilić | Lille | Union Berlin | Loan |
| 27.08.2024 | Jeong Woo-Yeong | VfB Stuttgart | Union Berlin | Loan |
| 07.08.2024 | T. Rothe | Borussia Dortmund | Union Berlin | € 5M |
| 28.07.2024 | C. Klaus | — | Union Berlin | Free |
| 20.07.2024 | Livan Burcu | — | Union Berlin | € 300K |
| 01.07.2024 | L. Bénes | Hamburger SV | Union Berlin | N/A |
| 01.07.2024 | I. Prtajin | — | Union Berlin | € 1M |
| 01.07.2024 | T. Puchacz | — | Union Berlin | N/A |
| 01.07.2024 | J. Siebatcheu | Borussia Mönchengladbach | Union Berlin | N/A |
| 01.07.2024 | David Preu | — | Union Berlin | N/A |
| 01.07.2024 | T. Skarke | SV Darmstadt 98 | Union Berlin | N/A |
| 01.07.2024 | A. Kemlein | FC St. Pauli | Union Berlin | N/A |
| 01.07.2024 | A. Král | — | Union Berlin | Free |
| 01.07.2024 | Y. Stein | — | Union Berlin | N/A |
| 01.07.2024 | L. Querfeld | Rapid Vienna | Union Berlin | € 3M |
| 01.02.2024 | Y. Vertessen | PSV Eindhoven | Union Berlin | € 4.8M |
| 18.01.2024 | C. Bedia | Servette FC | Union Berlin | € 2M |