Bonner SC U19 (U19 Bundesliga): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-07-21 | Player | Bonner SC U19 | Hennef 05 | Free |
| 2023-07-01 | Player | Bonner SC U19 | Schalke 04 U19 | Free |
| 2023-07-01 | Player | Bonner SC U19 | Alemannia Aachen U19 | Free |
| 2023-07-01 | Emirhan Ünal | Bonner SC U19 | Wuppertaler SV U19 | Free |
| 2023-01-01 | Player | Bayer Leverkusen U19 | Bonner SC U19 | Free |
| 2022-09-01 | Player | TBC | Bonner SC U19 | Free |
| 2022-07-01 | Player | Hennef 05 U17 | Bonner SC U19 | Free |
| 2022-07-01 | Player | Bonner SC U19 | FC BW Friesdorf | Free |
| 2022-07-01 | Emirhan Ünal | Hennef 05 U17 | Bonner SC U19 | Free |
| 2021-07-01 | Player | Hennef 05 U19 | Bonner SC U19 | Free |
| 2021-01-01 | Player | Bonner SC U19 | Bonner SC | Free |
| 2020-07-01 | Player | RW Koblenz U19 | Bonner SC U19 | Free |
| 2019-07-01 | Player | Bonner SC U19 | Zulte Waregem II | Free |
| 2019-07-01 | David Theodor Winke | Bonner SC U19 | Bonner SC | Free |