FC Basel 1893 (Super League): every transfer in and out, fees paid and earned, squad market value, €127m spent and €366m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Marwin Hitz | Basel | Retired | — |
| 2026-07-01 | Jonas Omlin | Mönchengladbach | Basel | Free |
| 2026-07-01 | Finn van Breemen | Basel | Famalicão | €1.5m |
| 2026-07-01 | Dion Kacuri | Basel | A. Lustenau | Loan |
| 2026-02-16 | Emmanuel Essiam | Basel | FC Winterthur | Loan |
| 2026-02-16 | Becir Omeragic | Montpellier | Basel | €2.3m |
| 2026-02-09 | Noah Streit | Basel | Montréal | — |
| 2026-02-02 | Philip Otele | Basel | Hamburg | Loan |
| 2026-02-02 | Jonas Adjetey | Basel | Wolfsburg | €9.5m |
| 2026-02-02 | Giacomo Koloto | FC Basel U21 | Basel | — |
| 2026-01-26 | Junior Zé | Basel | Midtjylland | Loan |
| 2026-01-22 | Julien Duranville | Dortmund | Basel | Loan |
| 2026-01-20 | Adrian Leon Barisic | Basel | Braga | Loan |
| 2026-01-15 | Tim Spycher | Basel | FC Thun | €235k |
| 2026-01-14 | Juan Carlos Gauto | Basel | Platense | Loan |
| 2025-09-01 | Ibrahim Salah | Stade Rennais | Basel | €2m |
| 2025-09-01 | Flavius Daniliuc | Salernitana | Basel | €500k |
| 2025-08-25 | Jeremy Agbonifo | Lens | Basel | Loan |
| 2025-08-25 | Anton Kade | Basel | Augsburg | €2.3m |
| 2025-08-19 | Emmanuel Essiam | Basel | Francs Borains | Loan |