Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2025 |  | Samuel Beyers |  | 1. FC Köln II (U14) U15 | U15 | |
| 07/2025 | | Ben Buchholz | ||||
| 07/2025 | | Isa Burnic |  | 1. FC Köln II (U16) U17 | U17 | |
| 07/2025 | | Lorenzo Fusaro | | 1. FC Köln II (U14) U15 | U15 | |
| 07/2025 |  | Maksym Havrylenko |  | Fortuna Düsseldorf U16 | Fortuna II U16 | |
| 07/2025 | | Paul Hoffe |  | Viktoria Köln U15 | U15 | |
| 07/2025 | | Julian Hoffstadt | | 1. FC Köln II (U14) U15 | U15 | |
| 07/2025 | | Karl Kupfer | ||||
| 07/2025 |  | Raymond Okach |  | FC Hennef 05 U15 | U15 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2025 | | Lion Dakaj | | 1. FC Köln II (U16) U17 | U17 | |
| 07/2025 | | Jakob Esser | GK |  | 1. FC Köln U17 | Köln U17 |
| 07/2025 | | Roman Inden | GK | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 |  | Leart Himaj | DF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 | | Arthur Kalmykov | DF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 | | Levi Liessem | DF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 | | Ben Reinartz | DF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 | | Julian Stange | DF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 | | Leonard Maaßen | MF | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 |  | Ismaïla Diallo | FW | | 1. FC Köln II (U16) U17 | U17 |
| 07/2025 |  | Loïc Mballa | FW |  | Mittelrhein U16 | U16 |
| 07/2025 | | Yassin Tollih | FW | | 1. FC Köln II (U16) U17 | U17 |