1.FC Union Berlin (Bundesliga): every transfer in and out, fees paid and earned, and the market value of the squad. €147m spent, €133m earned. Tracked squad: ACTUAL Value €100m vs €135m market value. Valued as of 2026-09-02.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-09-01 | Kastriot Imeri | BSC Young Boys | 1.FC Union Berlin | €2.5m |
| 2026-09-01 | Ilyas Ansah | 1.FC Union Berlin | Hull City | €17m |
| 2026-09-01 | Oluwaseun Ogbemudia | 1.FC Union Berlin | Waldhof Mannheim | Loan |
| 2026-08-27 | Felix Uduokhai | Beşiktaş Jimnastik Kulübü | 1.FC Union Berlin | €1.5m |
| 2026-08-19 | Michel Aebischer | Pisa Sporting Club | 1.FC Union Berlin | €3.5m |
| 2026-08-19 | Dmytro Bogdanov | 1.FC Union Berlin | Energie Cottbus | Loan |
| 2026-08-02 | Emmanuel Latte Lath | Atlanta United Football Club | 1.FC Union Berlin | Loan |
| 2026-07-16 | Alex Král | 1.FC Union Berlin | FC København | Free |
| 2026-07-16 | Chris Bedia | 1.FC Union Berlin | Al-Nasr | Free |
| 2026-07-14 | Danilho Doekhi | 1.FC Union Berlin | Società Sportiva Lazio S.p.A. | Free |
| 2026-07-02 | David Preu | 1.FC Union Berlin | VfB Stuttgart | Free |
| 2026-07-01 | Marvin Friedrich | Mönchengladbach | Union Berlin | Free |
| 2026-07-01 | Zeno Van Den Bosch | Royal Antwerp FC | 1.FC Union Berlin | Free |
| 2026-07-01 | Stanley Nsoki | TSG 1899 Hoffenheim | 1.FC Union Berlin | €1.5m |
| 2026-07-01 | Linus Güther | Union Berlin U19 | 1.FC Union Berlin | Free |
| 2026-07-01 | Yannic Stein | 1.FC Union Berlin | Hansa Rostock | Free |
| 2026-07-01 | László Bénes | 1.FC Union Berlin | KAA Gent | €1.1m |
| 2026-01-30 | Marin Ljubicic | Union Berlin | F. Düsseldorf | Loan |
| 2026-01-03 | Oluwaseun Ogbemudia | Union Berlin | W. Mannheim | Loan |
| 2025-09-01 | Lucas Tousart | Union Berlin | Stade Brestois | — |