St. Mirren U18: every transfer in and out, fees paid and earned, squad market value and €356k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-07-01 | Shay Kelly | St. Mirren U18 | Dumbarton | Free |
| 2025-07-01 | Billy Hutchinson | St. Mirren U18 | St. Mirren B | — |
| 2025-02-22 | Shay Kelly | St. Mirren U18 | Dumbarton | Loan |
| 2025-01-17 | Billy Hutchinson | St. Mirren U18 | Bo'ness United | Loan |
| 2025-01-01 | Evan Mooney | St. Mirren U18 | St. Mirren | — |
| 2024-12-05 | Callum Penman | St. Mirren U18 | St. Mirren | — |
| 2024-08-30 | Ethan Sutherland | St. Mirren U18 | Wolves U21 | €356k |
| 2024-03-09 | Callum Penman | St. Mirren U18 | Linlithgow Rose | Loan |
| 2024-02-01 | Ethan Sutherland | St. Mirren U18 | Alloa Athletic | Loan |
| 2023-07-01 | Ethan Sutherland | St. Mirren FC U17 | St. Mirren U18 | — |
| 2023-07-01 | Aiden Gilmartin | St. Mirren U18 | St. Mirren | — |
| 2022-07-01 | Kieran Offord | St. Mirren U18 | St. Mirren | — |
| 2022-07-01 | Andrew Gaffney | St. Mirren U18 | St. Mirren B | — |
| 2022-07-01 | Aiden Gilmartin | St. Mirren U18 | Cowdenbeath | Loan |
| 2022-01-01 | Kieran Offord | St. Mirren U18 | East Stirling | Loan |
| 2021-12-02 | Kieran Offord | St. Mirren U18 | East Stirling | Loan |
| 2021-07-01 | Luke Kenny | St. Mirren U18 | St. Mirren B | — |
| 2021-07-01 | Kieran Offord | St. Mirren FC U17 | St. Mirren U18 | — |
| 2021-07-01 | Fraser Taylor | St. Mirren U18 | St. Mirren B | — |
| 2020-07-01 | Luke Kenny | Greenock M. U18 | St. Mirren U18 | Free |