1.FC Köln U17: every transfer in and out, fees paid and earned, squad market value, €40k spent and €200k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2024-07-01 | Fynn Schenten | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2023-07-01 | Youssoupha Niang | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2023-07-01 | Fynn Schenten | 1.FC Köln Yth. | 1.FC Köln U17 | — |
| 2023-07-01 | Fayssal Harchaoui | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2022-07-01 | Youssoupha Niang | 1.FC Köln Yth. | 1.FC Köln U17 | — |
| 2021-07-01 | Nicolas Bajlicz | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2021-07-01 | Fayssal Harchaoui | 1.FC Köln Yth. | 1.FC Köln U17 | — |
| 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 | — |
| 2021-07-01 | Damion Downs | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-09-28 | Damion Downs | Ingolstadt U17 | 1.FC Köln U17 | Free |
| 2020-09-04 | Nicolas Bajlicz | AKA Austria U16 | 1.FC Köln U17 | €40k |
| 2020-07-01 | Vladimir Fratea | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-07-01 | Namory Cisse | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-07-01 | Justin Diehl | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-07-01 | Jonas Urbig | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-07-01 | Jens Castrop | 1.FC Köln U17 | 1.FC Köln U19 | — |
| 2020-07-01 | Elias Bakatukanda | 1.FC Köln Yth. | 1.FC Köln U17 | — |
| 2020-01-31 | Florian Wirtz | 1.FC Köln U17 | Leverkusen U19 | €200k |
| 2020-01-01 | Justin Diehl | 1.FC Köln Yth. | 1.FC Köln U17 | — |