GKS GieKSa Katowice Spółka Akcyjna (Pko BP Ekstraklasa): every transfer in and out, fees paid and earned, squad market value, €2.2m spent and €835k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Bartosz Wolski | Motor Lublin | GKS Katowice | €100k |
| 2026-04-08 | Wojciech Pańkowski | GKS Katowice II | GKS Katowice | — |
| 2026-03-04 | Marius Olsen | Kristiansund BK | GKS Katowice | Free |
| 2026-02-11 | Damian Rasak | Újpest FC | GKS Katowice | Loan |
| 2026-01-26 | Mateusz Wdowiak | Zaglebie Lubin | GKS Katowice | — |
| 2026-01-26 | Erik Jirka | Piast Gliwice | GKS Katowice | €400k |
| 2025-10-24 | Jakub Kokosiński | GKS Katowice II | GKS Katowice | — |
| 2025-09-06 | Ilya Shkurin | Legia Warszawa | GKS Katowice | €450k |
| 2025-08-29 | Eman Marković | IFK Göteborg | GKS Katowice | — |
| 2025-08-28 | Kacper Ćwielong | GKS Katowice | Sandecja | Loan |
| 2025-08-14 | Jesse Bosch | Willem II | GKS Katowice | Free |
| 2025-07-28 | Miłosz Swatowski | GKS Katowice II | GKS Katowice | — |
| 2025-07-18 | Filip Rejczyk | Slask Wroclaw | GKS Katowice | Free |
| 2025-07-04 | Oskar Repka | GKS Katowice | Raków | €700k |
| 2025-07-01 | Sebastian Bergier | GKS Katowice | Widzew Lodz | Free |
| 2025-07-01 | Mateusz Kowalczyk | Bröndby IF | GKS Katowice | €1m |
| 2025-07-01 | Marcel Wędrychowski | Pogon Szczecin | GKS Katowice | Free |
| 2025-07-01 | Kacper Łukasiak | Pogon Szczecin | GKS Katowice | Free |
| 2025-07-01 | Aleksander Paluszek | Slask Wroclaw | GKS Katowice | Free |
| 2025-02-05 | Dawid Drachal | Raków | GKS Katowice | Loan |