St. Gallen U18: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-07-01 | Pascal Büttiker | St. Gallen U18 | St. Gallen U19 | — |
| 2023-07-01 | Corsin Konietzke | St. Gallen U18 | St. Gallen U21 | — |
| 2022-08-08 | Nico Rissi | St. Gallen U18 | GC Zürich U21 | Free |
| 2022-07-01 | Corsin Konietzke | St. Gallen Yth. | St. Gallen U18 | — |
| 2020-07-01 | Nico Rissi | St. Gallen U16 | St. Gallen U18 | — |
| 2019-07-01 | Michael Heule | St. Gallen U18 | St. Gallen U21 | — |
| 2018-07-01 | Michael Heule | St. Gallen U16 | St. Gallen U18 | — |
| 2018-07-01 | Christian Witzig | St. Gallen U18 | St. Gallen U21 | — |
| 2017-07-01 | Nias Hefti | St. Gallen U18 | St. Gallen U21 | — |
| 2017-07-01 | Christian Witzig | St. Gallen U16 | St. Gallen U18 | — |
| 2017-07-01 | Betim Fazliji | St. Gallen U18 | St. Gallen U21 | — |
| 2016-07-01 | Nias Hefti | St. Gallen Yth. | St. Gallen U18 | — |
| 2016-07-01 | Jasper van der Werff | St. Gallen U18 | St. Gallen U21 | — |
| 2016-07-01 | Betim Fazliji | St. Gallen Yth. | St. Gallen U18 | — |
| 2015-09-11 | Silvan Hefti | St. Gallen U18 | FC St. Gallen | — |
| 2014-07-01 | Silvan Hefti | St. Gallen Yth. | St. Gallen U18 | — |
| 2014-07-01 | Kemal Ademi | St. Gallen U18 | St. Gallen U21 | — |
| 2014-07-01 | Jasper van der Werff | St. Gallen Yth. | St. Gallen U18 | — |