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| Player (age) | From club | To club | Date | Fee | |||
|---|---|---|---|---|---|---|---|
| Show/hide all additional info | Fees in euro (EUR) | ||||||
| 1 |  |  D. Downs (17) |  1.FC Köln U17 | 1.FC Köln U19 | 2021, Jul | ||
| 2 | |  E. Bakatukanda (17) | 1.FC Köln U17 | 1.FC Köln U19 | 2021, Jul | ||
| 3 | | J. Diehl (15) | 1.FC Köln U17 | 1.FC Köln U19 | 2020, Jul | ||
| 4 | | J. Urbig (16) | 1.FC Köln U17 | 1.FC Köln U19 | 2020, Jul | ||
| 5 | | F. Wirtz (16) | 1.FC Köln U17 |  Bayer 04 Leverkusen U19 | 2020, Jan | 200 000 | |
| 6 | | M. Obuz (17) | 1.FC Köln U17 | 1.FC Köln U19 | 2019, Jul | ||
| 7 | | J. Thielmann (17) | 1.FC Köln U17 | 1.FC Köln U19 | 2019, Jul | ||
| 8 | | T. Lemperle (16) | 1.FC Köln U17 | 1.FC Köln U19 | 2019, Jan | ||
| 9 | | R. Voloder (17) | 1.FC Köln U17 | 1.FC Köln U19 | 2018, Jul | ||
| 10 | | C. Bozdoğan (17) | 1.FC Köln U17 | 1.FC Köln U19 | 2018, Jul | ||