FC Sion (Super League): every transfer in and out, fees paid and earned, squad market value, €20m spent and €41m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Winsley Boteli | M'gladbach II | FC Sion | €3.5m |
| 2026-02-11 | Ryan Kessler | FC Aarau | FC Sion | — |
| 2026-01-16 | Franck Surdez | KAA Gent | FC Sion | €1.3m |
| 2026-01-15 | Simon Caillet | FC Basel U21 | FC Sion | — |
| 2025-08-29 | Donat Rrudhani | Young Boys | FC Sion | €800k |
| 2025-08-27 | Federico Barba | FC Sion | Persib | Free |
| 2025-08-27 | Federico Barba | FC Sion | PERSIB | Free |
| 2025-08-22 | Anton Miranchuk | FC Sion | Dynamo Moscow | €2.5m |
| 2025-08-02 | Dejan Djokic | FC Sion | Debrecen | Loan |
| 2025-07-24 | Mouhcine Bouriga | FC Sion | AS FAR Rabat | €440k |
| 2025-07-24 | Lamine Diack | FC Nantes | FC Sion | Loan |
| 2025-07-11 | Georgi Rusev | FC Sion | CSKA 1948 | — |
| 2025-07-04 | Francesco Ruberto | Vizela | FC Sion | Free |
| 2025-07-02 | Pajtim Kasami | FC Sion | Without Club | — |
| 2025-07-01 | Winsley Boteli | M'gladbach II | FC Sion | Loan |
| 2025-07-01 | Rilind Nivokazi | AC Bellinzona | FC Sion | €690k |
| 2025-07-01 | Nevio Biner | FC Sion U19 | FC Sion | — |
| 2025-07-01 | Maxime Dubosson | FC Sion U21 | FC Sion | — |
| 2025-07-01 | Kreshnik Hajrizi | Widzew Lodz | FC Sion | €213k |
| 2025-07-01 | Josias Lukembila | Paris FC | FC Sion | Free |