Birmingham U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-09-01 | Trevan Sanusi | Birmingham U21 | Newcastle U18 | — |
| 2023-07-01 | Trevan Sanusi | Birmingham Aca. | Birmingham U21 | — |
| 2023-07-01 | Romelle Donovan | Birmingham U21 | Birmingham | — |
| 2022-07-01 | Romelle Donovan | Birmingham Aca. | Birmingham U21 | — |
| 2020-07-01 | Caolan Boyd-Munce | Birmingham U23 | Birmingham | — |
| 2019-01-10 | Ronan Hale | Birmingham U23 | Crusaders | Free |
| 2018-08-01 | Caolan Boyd-Munce | Birmingham U23 | Redditch | Loan |
| 2018-07-01 | Caolan Boyd-Munce | Birmingham U18 | Birmingham U23 | — |
| 2018-01-03 | Ronan Hale | Birmingham U23 | Derry City | Loan |
| 2016-07-01 | Ronan Hale | Birmingham U18 | Birmingham U23 | — |
| 2013-09-02 | Eddy Gnahoré | Birmingham U21 | Without Club | — |
| 2011-07-01 | Eddy Gnahoré | Birmingham U18 | Birmingham U21 | — |
| 2011-07-01 | Alpaslan Öztürk | Birmingham U21 | Beerschot U19 | Free |
| 2010-10-01 | Alpaslan Öztürk | Birmingham U18 | Birmingham U21 | — |