1.FC Köln U19: every transfer in and out, fees paid and earned, squad market value and €1.5m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-29 | Fynn Schenten | 1.FC Köln U19 | 1.FC Köln | — |
| 2025-07-01 | Youssoupha Niang | 1.FC Köln U19 | 1.FC Köln II | — |
| 2024-07-01 | Fynn Schenten | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2024-07-01 | Fayssal Harchaoui | 1.FC Köln U19 | 1.FC Köln | — |
| 2023-07-01 | Youssoupha Niang | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2023-07-01 | Max Finkgräfe | 1.FC Köln U19 | 1.FC Köln | — |
| 2023-07-01 | Justin Diehl | 1.FC Köln U19 | 1.FC Köln II | — |
| 2023-07-01 | Fayssal Harchaoui | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2023-07-01 | Emin Kujovic | 1.FC Köln U19 | 1.FC Köln II | — |
| 2023-07-01 | Elias Bakatukanda | 1.FC Köln U19 | 1.FC Köln | — |
| 2023-07-01 | Damion Downs | 1.FC Köln U19 | 1.FC Köln | — |
| 2022-08-11 | Namory Cisse | 1.FC Köln U19 | Sittard U21 | Free |
| 2022-07-01 | Vladimir Fratea | 1.FC Köln U19 | Without Club | — |
| 2022-07-01 | Jonas Urbig | 1.FC Köln U19 | 1.FC Köln | — |
| 2022-01-20 | Nicolas Bajlicz | 1.FC Köln U19 | Rapid Wien II | — |
| 2021-07-01 | Nicolas Bajlicz | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2021-07-01 | Max Finkgräfe | Unterrath U17 | 1.FC Köln U19 | Free |
| 2021-07-01 | Jens Castrop | 1.FC Köln U19 | 1.FC Köln II | — |
| 2021-07-01 | Emin Kujovic | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2021-07-01 | Elias Bakatukanda | 1.FC Köln U17 | 1.FC Köln U19 | — |