FC St. Gallen 1879 (Super League): every transfer in and out, fees paid and earned, squad market value, €8.7m spent and €33m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Alessandro Vogt | FC St. Gallen | Hoffenheim | €2.7m |
| 2026-05-01 | Nevio Scherrer | St. Gallen U21 | FC St. Gallen | — |
| 2026-02-06 | Albert Vallci | FC St. Gallen | Sturm Graz | Free |
| 2026-01-28 | Antonio Verinac | VfB Lübeck | FC St. Gallen | — |
| 2026-01-27 | Yannick Bujard | FC Wil 1900 | FC St. Gallen | — |
| 2026-01-16 | Stephan Ambrosius | FC St. Gallen | Karlsruher SC | Loan |
| 2026-01-15 | Colin Kleine-Bekel | VfL Bochum | FC St. Gallen | Loan |
| 2026-01-01 | Nino Weibel | St. Gallen U21 | FC St. Gallen | — |
| 2026-01-01 | Diego Besio | St. Gallen U21 | FC St. Gallen | — |
| 2025-09-17 | Tiemoko Ouattara | Servette FC | FC St. Gallen | Loan |
| 2025-09-10 | Kevin Csoboth | FC St. Gallen | Genclerbirligi | Loan |
| 2025-09-05 | Abdoulaye Diaby | FC St. Gallen | Grasshoppers | Free |
| 2025-08-28 | Malamine Efekele | Monaco U21 | FC St. Gallen | — |
| 2025-08-23 | Nikolaj Möller | FC St. Gallen | Dundee United | Free |
| 2025-08-17 | Willem Geubbels | FC St. Gallen | Paris FC | €9m |
| 2025-07-22 | Alessandro Vogt | St. Gallen U21 | FC St. Gallen | — |
| 2025-07-21 | Aliou Baldé | Nice | FC St. Gallen | Loan |
| 2025-07-11 | Felix Mambimbi | FC St. Gallen | Le Havre AC | Free |
| 2025-07-01 | Tom Gaal | SSV Ulm 1846 | FC St. Gallen | Free |
| 2025-07-01 | Lukas Daschner | VfL Bochum | FC St. Gallen | €650k |