Portsmouth U18: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2020-01-17 | Josh Flint | Portsmouth U18 | Bognor Regis | Free |
| 2015-07-01 | Snorre Strand Nilsen | Portsmouth U18 | Portsmouth | — |
| 2015-01-01 | Conor Chaplin | Portsmouth U18 | Portsmouth | — |
| 2013-09-25 | Snorre Strand Nilsen | Raufoss Yth. | Portsmouth U18 | — |
| 2012-07-01 | Nikita Haikin | Portsmouth U18 | Reading U18 | Free |
| 2012-07-01 | Josh Sims | Portsmouth U18 | Southampton U18 | Free |
| 2012-07-01 | Alex Grant | Portsmouth U18 | Portsmouth | — |
| 2012-01-01 | Adam Webster | Portsmouth U18 | Portsmouth | — |
| 2011-07-01 | Tom King | Portsmouth U18 | Palace U18 | Free |
| 2010-07-15 | Alex Grant | ECU Joondalup | Portsmouth U18 | Free |
| 2010-07-01 | Nikita Haikin | Chelsea Youth | Portsmouth U18 | Free |