Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 06/2019 |  | Boris Babić | FW |  | FC Vaduz | FC Vaduz |
| 02/2019 | | Thomas Wyss | TRA-C | |||
| 01/2019 | | Jérémy Guillemenot | FW |  | Rapid Vienna | Rapid Vienna |
| 01/2019 | | Silvan Gönitzer | DF |  | FC Rapperswil-Jona | FCRJ |
| 01/2019 |  | Ioannis Amanatidis | AS-CO | |||
| 01/2019 | | Simone Rapp | FW |  | FC Lausanne-Sport | FC Lausanne |
| 01/2019 |  | Eugen Polański | AS-CO | |||
| 01/2019 | | Leonidas Stergiou | DF |  | FCO St. Gallen U18 | U18 |
| 01/2019 |  | Víctor Ruiz | FW |  | SD Formentera | SD Formentera |
| 12/2018 | | Angelo Campos | FW |  | FC St. Gallen II | St. Gallen II |
| 08/2018 |  | Musah Nuhu | DF |  | WAFA | WAFA |
| 07/2018 |  | Slimen Kchouk | DF |  | Club Africain | CA |
| 07/2018 |  | Axel Bakayoko | MF |  | Inter | Inter |
| 07/2018 | | Vincent Sierro | MF |  | SC Freiburg | Freiburg |
| 07/2018 | | Dereck Kutesa | FW |  | FC Basel 1893 | FC Basel |
| 07/2018 | | Majeed Ashimeru | MF |  | RB Salzburg | RB Salzburg |
| 07/2018 | | Gianluca Tolino | GK | | FCO St. Gallen U18 | U18 |
| 07/2018 | | Nias Hefti | DF |  | FC Wil 1900 | FC Wil |
| 07/2018 |  | Leonel Mosevich | DF |  | Argentinos Juniors | Arg. Juniors |
| 07/2018 |  | Milan Vilotić | DF |  | Grasshopper Club Zürich II | GC Zürich II |
| 07/2018 | | Jordi Quintillà | MF |  | Puerto Rico FC | PRFC |
| 07/2018 |  | Kekuta Manneh | MF |  | CF Pachuca | Pachuca |
| 07/2018 |  | Peter Zeidler | MA | |||
| 07/2018 | | Peter Kappeler | AS-CO |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 02/2019 | | Kekuta Manneh | MF |  | FC Cincinnati | Cincinnati |
| 02/2019 | | Roman Buess | FW | | FC Lausanne-Sport | FC Lausanne |
| 01/2019 |  | Peter Tschernegg | MF |  | TSV Hartberg | TSV Hartberg |
| 08/2018 |  | Stjepan Kukuruzović | MF | | FC Lausanne-Sport | FC Lausanne |
| 08/2018 | | Marco Aratore | MF |  | FK Ural | FK Ural |
| 08/2018 | | Nias Hefti | DF | | FC Wil 1900 | FC Wil |
| 07/2018 | | Adonis Ajeti | DF |  | FC Chiasso | FC Chiasso |
| 07/2018 | | Noah Blasucci | FW | | FC Vaduz | FC Vaduz |
| 07/2018 | | Silvan Gönitzer | DF | | FC Rapperswil-Jona | FCRJ |
| 07/2018 |  | Nzuzi Toko | MF |  | Al Fateh | Al Fateh |
| 07/2018 | | Stefan Lapcevic | GK |  | SC YF/Juventus Zürich | YF Juventus |
| 07/2018 |  | Yrondu Musavu-King | DF |  | Udinese Calcio | Udinese |
| 07/2018 | | Jasper van der Werff | DF | | RB Salzburg | RB Salzburg |
| 07/2018 |  | Rúnar Sigurjónsson | MF |  | Grasshopper Club Zürich | Grasshoppers |
| 07/2018 | | Danijel Aleksić | FW |  | Yeni Malatyaspor | Y. Malatyaspor |
| 07/2018 | | Markus Hoffmann | AS-CO |  | 1. FC Union Berlin | Union Berlin |
| 07/2018 | | Sebastian Boxleitner | AT-C | | FC St. Gallen II | St. Gallen II |