Viktoria Köln: every transfer in and out, fees paid and earned, squad market value, €355k spent and €3.3m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-05 | Robin Velasco | Viktoria Köln | TSV Havelse | Free |
| 2026-07-23 | Kilian Jakob | 1860 München | Viktoria Köln | Free |
| 2026-07-22 | Noah Maboulou | 1. FC Nürnberg | Viktoria Köln | Loan |
| 2026-07-02 | Terry Benjamin | Viktoria Köln | SpVgg Greuther Fürth | Free |
| 2026-07-01 | Niklas Castelle | Ulm | Viktoria Köln | Free |
| 2026-07-01 | J. Amann | 1.FSV Mainz 05 | Viktoria Köln | Free |
| 2026-07-01 | Niklas Jahn | Bochum II | Viktoria Köln | Free |
| 2026-07-01 | Pascal Fallmann | Erzgebirge Aue | Viktoria Köln | Free |
| 2026-07-01 | Alexander Prokopenko | Carl Zeiss Jena | Viktoria Köln | Free |
| 2026-07-01 | Niklas Swider | Borussia Mönchengladbach | Viktoria Köln | Loan |
| 2026-07-01 | David Richter | Viktoria Köln | Chemnitzer FC | Free |
| 2026-07-01 | Leonhard Münst | Viktoria Köln | VfL Osnabrück | €100k |
| 2026-07-01 | Lars Dietz | Viktoria Köln | Patro Eisden | Free |
| 2026-07-01 | Simon Handle | Viktoria Köln | Hallein | Free |
| 2026-07-01 | Soichiro Kozuki | Viktoria Köln | Shonan Bellmare | Free |
| 2026-02-02 | Jakob Sachse | FC Schalke 04 | Viktoria Köln | Loan |
| 2026-02-02 | Dudu | Viktoria Köln | Estrela Amadora | — |
| 2026-02-02 | Dudu | Viktoria Köln | Estrela U23 | Free |
| 2026-01-03 | Lex-Tyger Lobinger | Viktoria Köln | MSV Duisburg | Free |
| 2025-09-01 | Frank Ronstadt | 1. FC Kaiserslautern | Viktoria Köln | Loan |