St. Mirren FC U20: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2018-07-01 | Cammy MacPherson | St. Mirren FC U20 | St. Mirren | — |
| 2018-01-31 | Cammy MacPherson | St. Mirren FC U20 | Stranraer | Loan |
| 2016-07-01 | Kyle Magennis | St. Mirren FC U20 | St. Mirren | — |
| 2015-07-01 | Kyle Magennis | St. Mirren FC U17 | St. Mirren FC U20 | — |
| 2015-07-01 | Cammy MacPherson | St. Mirren FC U17 | St. Mirren FC U20 | — |
| 2014-12-01 | Lewis Morgan | St. Mirren FC U20 | St. Mirren | — |
| 2013-07-01 | Lewis Morgan | St. Mirren FC U17 | St. Mirren FC U20 | — |
| 2012-11-01 | John McGinn | St. Mirren FC U20 | St. Mirren | — |
| 2012-07-01 | Sean Kelly | St. Mirren FC U20 | St. Mirren | — |
| 2011-07-01 | John McGinn | St. Mirren FC U17 | St. Mirren FC U20 | — |
| 2010-11-01 | Kenny McLean | St. Mirren FC U20 | St. Mirren | — |
| 2010-07-01 | Sean Kelly | St. Mirren FC U17 | St. Mirren FC U20 | — |