FC Basel U18: every transfer in and out, fees paid and earned, squad market value and €4.5m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-07-01 | Noah Streit | FC Basel U18 | FC Basel U21 | — |
| 2023-07-01 | Junior Zé | FC Basel U18 | FC Basel U21 | — |
| 2023-07-01 | Demir Xhemalija | FC Basel U18 | FC Basel U21 | — |
| 2022-07-01 | Roméo Beney | FC Basel U18 | FC Basel U21 | — |
| 2022-07-01 | Noah Streit | FC Basel U17 | FC Basel U18 | — |
| 2022-07-01 | Leon Avdullahu | FC Basel U18 | FC Basel U21 | — |
| 2022-07-01 | Junior Zé | FC Basel U16 | FC Basel U18 | — |
| 2022-07-01 | Demir Xhemalija | FC Basel U16 | FC Basel U18 | — |
| 2022-07-01 | Axel Kayombo | FC Basel U18 | FC Basel U21 | — |
| 2022-07-01 | Antonio Spagnoli | FC Basel U18 | FC Basel U21 | — |
| 2022-01-01 | Axel Kayombo | Servette U18 | FC Basel U18 | — |
| 2021-09-03 | Roméo Beney | FC Sion U18 | FC Basel U18 | — |
| 2021-07-01 | Tim Spycher | FC Basel U18 | FC Basel U21 | — |
| 2021-07-01 | Liam Chipperfield | FC Basel U18 | FC Basel U21 | — |
| 2021-07-01 | Levin Winkler | FC Basel U18 | FC Basel U21 | — |
| 2021-07-01 | Carmine Chiappetta | FC Basel U18 | FC Basel U21 | — |
| 2021-07-01 | Antonio Spagnoli | FC Basel Yth. | FC Basel U18 | — |
| 2021-07-01 | Andrin Hunziker | FC Basel U18 | Basel | — |
| 2020-09-07 | Albian Hajdari | FC Basel U18 | Juventus U19 | €4.5m |
| 2020-07-13 | Tim Spycher | FC Basel U16 | FC Basel U18 | — |