Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.02.2026 | F. Chávez | Bayern München | 1. FC Köln | Loan |
| 25.01.2026 | I. Rondić | Raków Częstochowa | 1. FC Köln | Return from loan |
| 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 |
| 11.12.2025 | C. Neumann | — | 1. FC Köln | - |
| 01.09.2025 | A. Castro-Montes | Union St. Gilloise | 1. FC Köln | Transfer |
| 31.08.2025 | A. Castro-Montes | Union St. Gilloise | 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 |
| 05.08.2025 | K. Lund | — | 1. FC Köln | Loan |
| 04.08.2025 | K. Lund | — | 1. FC Köln | Loan |
| 31.07.2025 | M. Bülter | 1899 Hoffenheim | 1. FC Köln | Transfer |
| 30.07.2025 | M. Bülter | 1899 Hoffenheim | 1. FC Köln | Transfer |
| 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 |
| 07.07.2025 | R. Zieler | — | 1. FC Köln | Transfer |
| 06.07.2025 | R. Zieler | — | 1. FC Köln | Transfer |
| 05.07.2025 | T. Krauß | FSV Mainz 05 | 1. FC Köln | Loan |
| 05.07.2025 | R. Zieler | — | 1. FC Köln | Transfer |
| 04.07.2025 | J. Kamiński | VfL Wolfsburg | 1. FC Köln | Loan |
| 04.07.2025 | T. Krauß | FSV Mainz 05 | 1. FC Köln | Loan |
| 03.07.2025 | J. Kamiński | VfL Wolfsburg | 1. FC Köln | Loan |
| 01.07.2025 | S. Adamyan | — | 1. FC Köln | Back from Loan |
| 01.07.2025 | E. Bakatukanda | FC BW Linz | 1. FC Köln | N/A |
| 01.07.2025 | F. Dietz | SCR Altach | 1. FC Köln | Back from Loan |
| 01.07.2025 | S. El Mala | — | 1. FC Köln | Back from Loan |
| 01.07.2025 | M. El Mala | — | 1. FC Köln | Back from Loan |
| 01.07.2025 | C. Onuoha | — | 1. FC Köln | N/A |
| 01.07.2025 | R. Carstensen | Lech Poznan | 1. FC Köln | N/A |
| 01.07.2025 | Max Lippert | — | 1. FC Köln | Loan |
| 30.06.2025 | R. Ache | — | 1. FC Köln | Transfer |
| 30.06.2025 | Í. Bergmann Jóhannesson | Fortuna Düsseldorf | 1. FC Köln | Transfer |
| 30.06.2025 | L. Dürholtz | SV Elversberg | 1. FC Köln | Free agent |
| 29.06.2025 | P. Wydra | — | 1. FC Köln | Return from loan |
| 29.06.2025 | R. Carstensen | Lech Poznan | 1. FC Köln | Return from loan |
| 29.06.2025 | S. El Mala | — | 1. FC Köln | Return from loan |
| 29.06.2025 | F. Dietz | SCR Altach | 1. FC Köln | Return from loan |
| 29.06.2025 | M. El Mala | — | 1. FC Köln | Return from loan |
| 01.06.2025 | Í. Bergmann Jóhannesson | Fortuna Düsseldorf | 1. FC Köln | Transfer |
| 01.06.2025 | R. Ache | — | 1. FC Köln | Transfer |
| 03.02.2025 | I. Rondić | Widzew Łódź | 1. FC Köln | Transfer |
| 31.01.2025 | A. Racioppi | — | 1. FC Köln | Loan |
| 13.01.2025 | J. Schmied | FC Sion | 1. FC Köln | Transfer |
| 01.01.2025 | J. Gazibegović | Sturm Graz | 1. FC Köln | Transfer |
| 01.07.2024 | R. Carstensen | Genk | 1. FC Köln | 1.5M |
| 01.07.2024 | S. El Mala | — | 1. FC Köln | 450K |