Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 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 | Ilyas Ansah | — | Union Berlin | Transfer |
| 29.06.2025 | R. Gosens | Union Berlin | Fiorentina | Transfer |
| 29.06.2025 | Livan Burcu | — | Union Berlin | Return from loan |
| 29.06.2025 | A. Ilić | Union Berlin | Lille | Return from loan |
| 29.06.2025 | J. Roussillon | Union Berlin | — | Free agent |
| 29.06.2025 | A. Král | Espanyol | Union Berlin | Return from loan |
| 29.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 29.06.2025 | J. Roussillon | Union Berlin | — | Free agent |
| 29.06.2025 | A. Schwolow | Union Berlin | Heart Of Midlothian | Free agent |
| 29.06.2025 | I. Prtajin | Union Berlin | — | Transfer |
| 29.06.2025 | Y. Stein | — | Union Berlin | Return from loan |
| 29.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 29.06.2025 | P. Jaeckel | — | Union Berlin | Return from loan |
| 29.06.2025 | Jeong Woo-Yeong | Union Berlin | VfB Stuttgart | Return from loan |
| 29.06.2025 | L. Grill | — | Union Berlin | Return from loan |
| 06.06.2025 | Ilyas Ansah | — | Union Berlin | Transfer |
| 01.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 03.02.2025 | Y. Vertessen | Union Berlin | Red Bull Salzburg | Transfer |
| 03.02.2025 | J. Siebatcheu | Union Berlin | Reims | Transfer |
| 02.02.2025 | C. Bedia | Union Berlin | BSC Young Boys | Loan |
| 02.02.2025 | M. LjubiÄiÄ | Lask Linz | Union Berlin | Transfer |
| 01.02.2025 | Y. Vertessen | Union Berlin | Red Bull Salzburg | Transfer |
| 28.01.2025 | Y. Stein | Union Berlin | — | Loan |
| 22.01.2025 | L. Grill | Union Berlin | — | Loan |
| 30.08.2024 | R. Gosens | Union Berlin | Fiorentina | Loan |
| 30.08.2024 | A. Ilić | Lille | Union Berlin | Loan |
| 29.08.2024 | P. Jaeckel | Union Berlin | — | Loan |
| 27.08.2024 | Jeong Woo-Yeong | VfB Stuttgart | Union Berlin | Loan |
| 22.08.2024 | C. Bedia | Union Berlin | — | Loan |
| 07.08.2024 | A. Král | Union Berlin | Espanyol | Loan |
| 07.08.2024 | T. Rothe | Borussia Dortmund | Union Berlin | € 5M |
| 02.08.2024 | T. Puchacz | Union Berlin | Holstein Kiel | N/A |
| 28.07.2024 | C. Klaus | — | Union Berlin | Free |
| 21.07.2024 | Livan Burcu | Union Berlin | — | Loan |
| 20.07.2024 | Livan Burcu | — | Union Berlin | € 300K |
| 19.07.2024 | R. Knoche | Union Berlin | — | Free |
| 13.07.2024 | A. Laïdouni | Union Berlin | — | € 4.5M |
| 08.07.2024 | K. Endo | Union Berlin | — | Free |
| 04.07.2024 | L. Grill | Union Berlin | — | Loan |
| 01.07.2024 | Tim Schleinitz | Union Berlin | — | Free |
| 01.07.2024 | T. Puchacz | — | Union Berlin | N/A |
| 01.07.2024 | I. Prtajin | — | Union Berlin | € 1M |
| 01.07.2024 | B. Aaronson | Union Berlin | Leeds | N/A |
| 01.07.2024 | David Preu | — | Union Berlin | N/A |
| 01.07.2024 | A. Král | — | Union Berlin | Free |
| 01.07.2024 | Y. Stein | — | Union Berlin | N/A |
| 01.07.2024 | A. Kemlein | FC St. Pauli | Union Berlin | N/A |
| 01.07.2024 | L. Querfeld | Rapid Vienna | Union Berlin | € 3M |