FC Winterthur (Super League): every transfer in and out, fees paid and earned, squad market value, €800k spent and €4.3m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-30 | Aldin Turkes | Sarajevo | FC Winterthur | Free |
| 2026-07-01 | Stefanos Kapino | FC Winterthur | Without Club | — |
| 2026-07-01 | Silvan Sidler | FC Winterthur | Without Club | — |
| 2026-07-01 | Randy Schneider | FC Winterthur | Without Club | — |
| 2026-07-01 | Lukas Mühl | FC Winterthur | Without Club | — |
| 2026-07-01 | Carmine Chiappetta | FC Winterthur | FC Schaffhausen | Free |
| 2026-07-01 | Basil Stillhart | FC Winterthur | Without Club | — |
| 2026-07-01 | Bafodé Dansoko | FC Winterthur | Without Club | — |
| 2026-07-01 | Adrian Durrer | FC Winterthur | Without Club | — |
| 2026-02-24 | Marvin Martins | FC Winterthur | Liepāja | Free |
| 2026-02-24 | Marvin Martins | FC Winterthur | Liepaja | Free |
| 2026-02-16 | Emmanuel Essiam | Basel | FC Winterthur | Loan |
| 2026-02-03 | Rhodri Smith | Young Boys | FC Winterthur | Loan |
| 2026-02-02 | Mirlind Kryeziu | Without Club | FC Winterthur | — |
| 2025-09-25 | Pajtim Kasami | Without Club | FC Winterthur | — |
| 2025-09-08 | Francis Momoh | LNZ Cherkasy | FC Winterthur | Free |
| 2025-09-08 | Bafodé Dansoko | Patro Eisden | FC Winterthur | Free |
| 2025-08-15 | Marvin Martins | Almere City | FC Winterthur | Free |
| 2025-08-02 | Ledjan Sahitaj | Winterthur U21 | FC Winterthur | — |
| 2025-07-30 | Andrin Hunziker | Basel | FC Winterthur | Loan |