Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 05.02.2026 | E. Kujovic | 1. FC Köln | Wolfsberger AC | Loan |
| 01.02.2026 | F. Chávez | Bayern München | 1. FC Köln | Loan |
| 26.01.2026 | I. Rondić | 1. FC Köln | — | Loan |
| 25.01.2026 | I. Rondić | Raków Częstochowa | 1. FC Köln | Return from loan |
| 13.01.2026 | C. Onuoha | 1. FC Köln | Estrela | Transfer |
| 12.01.2026 | C. Onuoha | 1. FC Köln | Estrela | Transfer |
| 12.01.2026 | C. Onuoha | — | 1. FC Köln | Return from loan |
| 08.01.2026 | Y. Niang | 1. FC Köln | 1. FC Köln | Raise |
| 05.01.2026 | Jahmai Simpson-Pusey | Manchester City | 1. FC Köln | Loan |
| 05.01.2026 | Neo Telle | 1. FC Köln | — | Transfer |
| 04.01.2026 | Neo Telle | 1. FC Köln | — | Transfer |
| 31.12.2025 | J. Gazibegović | 1. FC Köln | Sturm Graz | Loan |
| 11.12.2025 | C. Neumann | — | 1. FC Köln | - |
| 02.09.2025 | I. Rondić | 1. FC Köln | Raków Częstochowa | Loan |
| 01.09.2025 | J. Christensen | 1. FC Köln | — | Transfer |
| 01.09.2025 | A. Castro-Montes | Union St. Gilloise | 1. FC Köln | Transfer |
| 01.09.2025 | I. Rondić | 1. FC Köln | Raków Częstochowa | Loan |
| 31.08.2025 | A. Castro-Montes | Union St. Gilloise | 1. FC Köln | Transfer |
| 30.08.2025 | J. Christensen | 1. FC Köln | — | Transfer |
| 29.08.2025 | Julian Andreas Pauli | 1. FC Köln | — | Loan |
| 28.08.2025 | Julian Andreas Pauli | 1. FC Köln | — | Loan |
| 28.08.2025 | L. Paqarada | 1. FC Köln | 1. FC Heidenheim | Transfer |
| 27.08.2025 | N. Bajlicz | 1. FC Köln | Ried | - |
| 27.08.2025 | L. Paqarada | 1. FC Köln | 1. FC Heidenheim | Transfer |
| 26.08.2025 | L. Paqarada | 1. FC Köln | 1. FC Heidenheim | Transfer |
| 26.08.2025 | F. Dietz | 1. FC Köln | — | Transfer |
| 13.08.2025 | R. van den Berg | — | 1. FC Köln | Transfer |
| 12.08.2025 | R. van den Berg | — | 1. FC Köln | Transfer |
| 09.08.2025 | C. Özkacar | Valencia | 1. FC Köln | Loan |
| 08.08.2025 | C. Özkacar | Valencia | 1. FC Köln | Loan |
| 07.08.2025 | M. Ouro-Tagba | 1. FC Köln | — | Free agent |
| 06.08.2025 | S. Tigges | 1. FC Köln | — | Transfer |
| 05.08.2025 | S. Tigges | 1. FC Köln | — | Transfer |
| 05.08.2025 | K. Lund | — | 1. FC Köln | Loan |
| 04.08.2025 | K. Lund | — | 1. FC Köln | Loan |
| 04.08.2025 | S. Tigges | 1. FC Köln | — | Transfer |
| 31.07.2025 | M. Bülter | 1899 Hoffenheim | 1. FC Köln | Transfer |
| 30.07.2025 | M. Bülter | 1899 Hoffenheim | 1. FC Köln | Transfer |
| 27.07.2025 | P. Wydra | 1. FC Köln | — | Free agent |
| 18.07.2025 | S. Sebulonsen | Brondby | 1. FC Köln | Transfer |
| 17.07.2025 | S. Sebulonsen | Brondby | 1. FC Köln | Transfer |
| 16.07.2025 | S. Sebulonsen | Brondby | 1. FC Köln | Transfer |
| 16.07.2025 | Malik Yilmaz | 1. FC Köln | — | Free agent |
| 15.07.2025 | Malik Yilmaz | 1. FC Köln | — | Free agent |
| 09.07.2025 | D. Downs | 1. FC Köln | Southampton | Transfer |
| 08.07.2025 | J. PotoÄnik | 1. FC Köln | — | Loan |
| 08.07.2025 | N. Soldo | 1. FC Köln | — | Free agent |
| 07.07.2025 | R. Zieler | — | 1. FC Köln | Transfer |
| 07.07.2025 | D. Downs | 1. FC Köln | Southampton | Transfer |
| 07.07.2025 | R. Carstensen | 1. FC Köln | Aarhus | Loan |