1.FC Köln (Bundesliga): every transfer in and out, fees paid and earned, squad market value, €172m spent and €188m earned. Tracked squad: ACTUAL Value €103m vs €158m market value. Valued as of 2026-08-26.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-21 | Ellyes Skhiri | Eintracht Frankfurt | 1.FC Köln | €1m |
| 2026-08-17 | Thijs Dallinga | Bologna Football Club 1909 | 1.FC Köln | Loan |
| 2026-07-28 | Fynn Schenten | 1.FC Köln | Roda JC Kerkrade | Loan |
| 2026-07-26 | Jusuf Gazibegovic | 1.FC Köln | Widzew Lodz | Loan |
| 2026-07-23 | Paul Okon-Engstler | Sydney FC | 1.FC Köln | €1m |
| 2026-07-11 | Gideon Mensah | AJ Auxerre | 1.FC Köln | Free |
| 2026-07-08 | Rasmus Carstensen | 1.FC Köln | AGF | €1m |
| 2026-07-07 | Jakub Kamiński | 1.FC Köln | SL Benfica | €17m |
| 2026-07-02 | Luka Lochoshvili | 1. FC Nürnberg | 1.FC Köln | €4.9m |
| 2026-07-01 | Jakub Kamiński | Wolfsburg | 1.FC Köln | €5.5m |
| 2026-07-01 | Tom Krauß | Mainz | 1.FC Köln | €3.5m |
| 2026-07-01 | Denis Huseinbasic | 1.FC Köln | Braga | Free |
| 2026-07-01 | Eric Martel | 1.FC Köln | Mainz | Free |
| 2026-07-01 | Denis Huseinbasic | 1.FC Köln | Sporting Braga | Free |
| 2026-07-01 | Dominique Heintz | 1.FC Köln | Fortuna Düsseldorf | Free |
| 2026-02-06 | Emin Kujovic | 1.FC Köln | Wolfsberger AC | Loan |
| 2026-02-02 | Felipe Chávez | FC Bayern II | 1.FC Köln | Loan |
| 2026-01-29 | Fynn Schenten | 1.FC Köln U19 | 1.FC Köln | — |
| 2026-01-27 | Imad Rondic | 1.FC Köln | Preußen Münster | Loan |
| 2026-01-14 | Chilohem Onuoha | 1.FC Köln | Estrela Amadora | Free |