Sheff Utd U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-07-24 | Miguel Freckleton | Sheff Utd U21 | St. Mirren | — |
| 2025-07-01 | Sam Curtis | Sheff Utd U21 | Sheff Utd | — |
| 2025-01-17 | Sam Curtis | Sheff Utd U21 | St. Johnstone | Loan |
| 2024-08-07 | Levis Pitan | Sheff Utd U21 | Piast Gliwice | — |
| 2024-08-02 | Sam Curtis | Sheff Utd U21 | Peterborough | Loan |
| 2024-07-26 | Miguel Freckleton | Sheff Utd U21 | Swindon Town | Loan |
| 2024-07-01 | Louie Marsh | Sheff Utd U21 | Sheff Utd | — |
| 2024-07-01 | Billy Blacker | Sheff Utd U18 | Sheff Utd U21 | — |
| 2024-02-23 | Nicksoen Gomis | Sheff Utd U21 | Toronto | Free |
| 2024-02-01 | Jili Buyabu | Sheff Utd U21 | Motherwell FC | Loan |
| 2024-02-01 | Antwoine Hackford | Sheff Utd U21 | Burton Albion | Loan |
| 2024-01-25 | Sam Curtis | St. Pat's | Sheff Utd U21 | Free |
| 2023-09-11 | Evan Easton | Celtic U18 | Sheff Utd U21 | Free |
| 2023-09-01 | Ryan Oné | Hamilton Acad. | Sheff Utd U21 | — |
| 2023-09-01 | Louie Marsh | Sheff Utd U21 | Doncaster | Loan |
| 2023-08-30 | Miguel Freckleton | Sheff Utd U21 | Chesterfield | Loan |
| 2023-07-01 | Owen Hampson | Sheff Utd U18 | Sheff Utd U21 | — |
| 2023-07-01 | Oliver Arblaster | Sheff Utd U21 | Sheff Utd | — |
| 2023-07-01 | Levis Pitan | Sheff Utd U18 | Sheff Utd U21 | — |
| 2023-07-01 | Femi Seriki | Sheff Utd U21 | Sheff Utd | — |