Boulogne U19: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2019-07-01 | Anthony Oyono | Boulogne U19 | Boulogne B | — |
| 2018-07-01 | Anthony Oyono | VAFC U19 | Boulogne U19 | Free |
| 2017-07-01 | Hugo Vandermersch | Boulogne U19 | SM Caen B | Free |
| 2013-07-01 | Moussa Niakhaté | Boulogne U19 | Valenciennes B | Free |
| 2012-07-01 | Moussa Niakhaté | Wasquehal U19 | Boulogne U19 | Free |