Jagiellonia Bialystok (Pko BP Ekstraklasa): every transfer in and out, fees paid and earned, squad market value, €4.1m spent and €27m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Miłosz Piekutowski | Jagiellonia | Without Club | — |
| 2026-07-01 | Afimico Pululu | Jagiellonia | Without Club | — |
| 2026-02-06 | Kajetan Szmyt | Zaglebie Lubin | Jagiellonia | €700k |
| 2026-01-30 | Zachary Zalewski | Jagiellonia II | Jagiellonia | — |
| 2026-01-30 | Apostolos Konstantopoulos | Raków | Jagiellonia | — |
| 2026-01-30 | AZ Jackson | Jagiellonia | Vancouver | Loan |
| 2026-01-28 | Matías Nahuel | Maccabi Haifa | Jagiellonia | Loan |
| 2026-01-28 | Louka Prip | Jagiellonia | Hvidovre | Free |
| 2026-01-26 | Samed Bazdar | Real Zaragoza | Jagiellonia | Loan |
| 2026-01-26 | Guilherme Montóia | Estrela Amadora | Jagiellonia | — |
| 2026-01-07 | Oskar Pietuszewski | Jagiellonia | Porto | €8m |
| 2025-12-04 | Maciej Kuczyński | Jagiellonia II | Jagiellonia | — |
| 2025-09-11 | Kamil Jóźwiak | Without Club | Jagiellonia | — |
| 2025-09-08 | Andy Pelmard | Clermont Foot | Jagiellonia | Loan |
| 2025-09-02 | Sergio Lozano | Levante | Jagiellonia | Free |
| 2025-08-31 | Youssuf Sylla | R Charleroi SC | Jagiellonia | Free |
| 2025-08-07 | Adrián Diéguez | Jagiellonia | Radomiak | Free |
| 2025-07-23 | AZ Jackson | Columbus | Jagiellonia | — |
| 2025-07-15 | Álex Pozo | UD Almería | Jagiellonia | Loan |
| 2025-07-04 | Maksymilian Stryjek | Jagiellonia | Kilmarnock FC | Free |