Transfer-History
| Termin | Name | Pos | St. | Alter | | kam von | | ging zu | Ablöse |
|---|
| 08.06.2020 | Maloney, Lennard | ZDMIVZM | 57 | 19 |  | 1. FC Union Berlin |  | VfB Stuttgart | 50.000 € |
| 08.06.2020 | Füllkrug, Niclas | ST | 77 | 25 |  | Hamburger SV | | 1. FC Union Berlin | 200.000 € |
| 28.05.2020 | Honsak, Mathias | LMLFSTLV | 68 | 22 | | 1. FC Union Berlin |  | Borussia Mönchengladbach | 300.000 € |
| 25.05.2020 | Halstenberg, Marcel | - | 81 | 27 |  | Hertha BSC | | 1. FC Union Berlin | 1.200.000 € |
| 24.05.2020 | Rodríguez, James | ZOMRMZM | 84 | 27 |  | SC Freiburg | | 1. FC Union Berlin | 1.500.000 € |
| 05.01.2020 | Trimmel, Christopher | RVRM | 72 | 31 | | 1. FC Union Berlin |  | 1. FC Magdeburg | 101 € |
| 28.12.2019 | Zenga, Erik | - | 67 | 25 |  | SC Paderborn 07 | | 1. FC Union Berlin | 50.001 € |
| 25.12.2019 | Prib, Edgar | TW | 71 | 29 | | 1. FC Union Berlin |  | Projektleitung | 1 € |
| 24.12.2019 | Kiyotake, Hiroshi | TW | 71 | 29 | | 1. FC Union Berlin | | Projektleitung | 1 € |
| 21.12.2019 | Bartels, Fin | TW | 74 | 31 | | 1. FC Union Berlin | | Projektleitung | 1 € |
| 18.12.2019 | Blum, Danny | - | 70 | 27 |  | F.C. Hansa Rostock | | 1. FC Union Berlin | 330.753 € |
| 18.12.2019 | Hwang, Hee-Chan | STLFRFLM | 73 | 22 | | 1. FC Union Berlin |  | FC Carl Zeiss Jena | 5.540.280 € |
| 17.12.2019 | Honsak, Mathias | LMLFSTLV | 68 | 22 |  | SV Darmstadt 98 | | 1. FC Union Berlin | 50.000 € |
| 14.12.2019 | Vagnoman, Josha | RVRM | 66 | 18 |  | RB Leipzig | | 1. FC Union Berlin | 750.001 € |
| 12.12.2019 | Knoche, Robin | IV | 77 | 26 | | 1. FC Union Berlin |  | FC Schalke 04 | 500.000 € |
| 04.12.2019 | Khedira, Rani | ZDMZM | 76 | 24 | | VfB Stuttgart | | 1. FC Union Berlin | 101 € |
| 28.11.2019 | Ndicka, Evan | IV | 76 | 19 | | Hertha BSC | | 1. FC Union Berlin | 1.250.001 € |
| 17.11.2019 | Bickel, Christian | - | 63 | 27 |  | TSG 1899 Hoffenheim | | 1. FC Union Berlin | 1 € |
| 15.11.2019 | Mascarell, Omar | ZDMZM | 78 | 25 | | 1. FC Union Berlin |  | 1. FSV Mainz 05 | 1.000.000 € |
| 08.11.2019 | Behrens, Hanno | - | 75 | 28 |  | 1. FC Nürnberg | | 1. FC Union Berlin | 303.880 € |
| 04.11.2019 | Jojic, Milos | - | 73 | 26 | | 1. FC Union Berlin |  | 1. FC Kaiserslautern | 500.000 € |
| 01.11.2019 | Chandler, Timothy | RVRM | 75 | 28 | | 1. FC Union Berlin | | Borussia Mönchengladbach | 1.157.625 € |
| 30.10.2019 | Ostrzolek, Matthias | - | 71 | 28 | | 1. FC Union Berlin |  | FC St. Pauli | 200.000 € |
| 28.10.2019 | Bartels, Fin | TW | 74 | 31 | | 1. FC Magdeburg | | 1. FC Union Berlin | 150.000 € |
| 25.10.2019 | Trimmel, Christopher | RVRM | 72 | 31 |  | FC Bayern München | | 1. FC Union Berlin | 500.000 € |