Luton U21 (): every transfer in and out, fees paid and earned, and the market value of the squad.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2024-02-01 | Taylan Harris | Reading U18 | Luton U21 | — |
| 2024-02-01 | Aidan Francis-Clarke | Luton U21 | St Albans City | Loan |
| 2024-02-01 | Jake Burger | Luton U21 | St Albans City | Loan |
| 2024-01-16 | Jayden Luker | Luton U21 | Woking | Loan |
| 2023-09-01 | Aidan Francis-Clarke | Luton U21 | Dag & Red FC | Loan |
| 2023-07-01 | Jake Burger | Luton U18 | Luton U21 | — |
| 2023-07-01 | Joe Johnson | Luton U18 | Luton U21 | — |
| 2023-07-01 | Zack Nelson | Luton U18 | Luton U21 | — |
| 2023-03-24 | Aidan Francis-Clarke | Luton U21 | St Albans City | Loan |
| 2023-01-31 | Axel Piesold | Dunstable | Luton U21 | Free |
| 2022-07-01 | Aidan Francis-Clarke | Luton U18 | Luton U21 | — |