St. Gallen U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-05-01 | Nevio Scherrer | St. Gallen U21 | FC St. Gallen | — |
| 2026-01-01 | Nino Weibel | St. Gallen U21 | FC St. Gallen | — |
| 2026-01-01 | Diego Besio | St. Gallen U21 | FC St. Gallen | — |
| 2025-07-22 | Alessandro Vogt | St. Gallen U21 | FC St. Gallen | — |
| 2025-07-01 | Nino Weibel | St. Gallen U19 | St. Gallen U21 | — |
| 2025-07-01 | Nevio Scherrer | St. Gallen U17 | St. Gallen U21 | — |
| 2025-07-01 | Diego Besio | St. Gallen U19 | St. Gallen U21 | — |
| 2025-07-01 | Behar Neziri | St. Gallen U21 | FC St. Gallen | — |
| 2025-02-11 | Pascal Büttiker | St. Gallen U19 | St. Gallen U21 | — |
| 2025-02-11 | Enoch Owusu | Inter U20 | St. Gallen U21 | Loan |
| 2024-08-26 | Behar Neziri | St. Gallen U21 | FC Wil 1900 | Loan |
| 2024-07-11 | Corsin Konietzke | St. Gallen U21 | FC St. Gallen | — |
| 2023-07-01 | Corsin Konietzke | St. Gallen U18 | St. Gallen U21 | — |
| 2023-07-01 | Behar Neziri | FC Bayern II | St. Gallen U21 | Free |
| 2023-01-13 | Alessandro Vogt | FC Wohlen | St. Gallen U21 | Free |
| 2021-07-01 | Michael Heule | St. Gallen U21 | FC Wil 1900 | Free |
| 2021-07-01 | Christian Witzig | St. Gallen U21 | FC St. Gallen | — |
| 2019-07-01 | Michael Heule | St. Gallen U18 | St. Gallen U21 | — |
| 2019-07-01 | Betim Fazliji | St. Gallen U21 | FC St. Gallen | — |
| 2019-02-06 | Leonidas Stergiou | St. Gallen U21 | FC St. Gallen | — |