FC Sion U18: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-07-01 | Nevio Biner | FC Sion U18 | FC Sion U19 | — |
| 2022-07-01 | Nevio Biner | FC Sion U16 | FC Sion U18 | — |
| 2022-07-01 | Maxime Dubosson | FC Sion U18 | FC Sion U21 | — |
| 2021-09-03 | Roméo Beney | FC Sion U18 | FC Basel U18 | — |
| 2021-07-01 | Roméo Beney | FC Sion U16 | FC Sion U18 | — |
| 2020-07-01 | Théo Berdayes | FC Sion U18 | FC Sion U21 | — |
| 2020-07-01 | Maxime Dubosson | FC Sion Yth. | FC Sion U18 | — |
| 2018-07-01 | Théo Berdayes | FC Sion Yth. | FC Sion U18 | — |
| 2018-07-01 | Mauro Rodrigues | FC Sion U18 | FC Sion U21 | — |
| 2017-07-30 | Joël Monteiro | FC Sion U18 | Azzurri LS | Free |
| 2017-07-01 | Mauro Rodrigues | FC Sion Yth. | FC Sion U18 | — |
| 2017-01-01 | Nicky Beloko | FC Sion U18 | FC Sion U21 | — |
| 2016-07-01 | Nicky Beloko | FC Sion Yth. | FC Sion U18 | — |
| 2015-07-01 | Joël Monteiro | FC Sion Yth. | FC Sion U18 | — |
| 2013-07-01 | Vincent Sierro | FC Sion U18 | FC Sion U21 | — |
| 2013-01-01 | Edimilson Fernandes | FC Sion U18 | FC Sion U21 | — |