FC Sion U21: every transfer in and out, fees paid and earned, squad market value and €180k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-08-12 | Ruben Londja | Le Havre AC | FC Sion U21 | — |
| 2025-07-01 | Maxime Dubosson | FC Sion U21 | FC Sion | — |
| 2023-07-01 | Nicky Clescenco | FC Sion U21 | Petrocub | — |
| 2023-01-26 | Nicky Clescenco | FC Sion U21 | Petrocub | Loan |
| 2022-07-01 | Maxime Dubosson | FC Sion U18 | FC Sion U21 | — |
| 2021-07-01 | Théo Berdayes | FC Sion U21 | FC Sion | — |
| 2021-02-02 | Nicky Clescenco | Without Club | FC Sion U21 | — |
| 2020-09-01 | Mauro Rodrigues | FC Sion U21 | FC Sion | — |
| 2020-09-01 | Arian Kabashi | FC Sion U21 | FC Sion | — |
| 2020-07-01 | Théo Berdayes | FC Sion U18 | FC Sion U21 | — |
| 2020-07-01 | Berkan Kutlu | FC Sion U21 | FC Sion | — |
| 2018-07-01 | Nicky Beloko | FC Sion U21 | Fiorentina U19 | €180k |
| 2018-07-01 | Mauro Rodrigues | FC Sion U18 | FC Sion U21 | — |
| 2018-07-01 | Berkan Kutlu | FC Monthey | FC Sion U21 | Free |
| 2017-01-01 | Nicky Beloko | FC Sion U18 | FC Sion U21 | — |
| 2016-07-01 | Arian Kabashi | Martigny-Sports | FC Sion U21 | — |
| 2016-01-28 | Lukas Cmelik | MSK Zilina | FC Sion U21 | Loan |
| 2015-07-01 | Vincent Sierro | FC Sion U21 | FC Sion | — |
| 2015-02-01 | Edimilson Fernandes | FC Sion U21 | FC Sion | — |
| 2013-07-01 | Vincent Sierro | FC Sion U18 | FC Sion U21 | — |