Dumbarton: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-24 | Aaron Brown | Ayr United | Dumbarton | Free |
| 2025-07-01 | Shay Kelly | St. Mirren U18 | Dumbarton | Free |
| 2025-02-22 | Shay Kelly | St. Mirren U18 | Dumbarton | Loan |
| 2024-09-11 | Ethan Schilte-Brown | Kilmarnock B | Dumbarton | Loan |
| 2024-01-18 | Gallagher Lennon | St. Mirren B | Dumbarton | Loan |
| 2022-07-06 | George Stanger | Dumbarton | Alloa Athletic | Free |
| 2022-02-18 | George Stanger | Stirling Uni | Dumbarton | — |
| 2022-01-13 | Kieran Wright | Rangers | Dumbarton | Loan |
| 2019-01-21 | Brad Spencer | Dumbarton | Forfar Athletic | Free |
| 2018-08-30 | Scott Allardice | Dundee United | Dumbarton | Loan |
| 2018-08-30 | Brad Spencer | Kilmarnock FC | Dumbarton | Free |
| 2018-01-22 | Kevin Nisbet | Partick Thistle | Dumbarton | Loan |
| 2017-07-01 | Tom Lang | Dumbarton | Stranraer | Free |
| 2017-01-12 | Tom Lang | Without Club | Dumbarton | — |
| 2015-09-09 | Eamonn Brophy | Hamilton Acad. | Dumbarton | Loan |
| 2015-01-16 | Stuart Findlay | Celtic U20 | Dumbarton | Loan |
| 2014-08-29 | Chris Kane | St. Johnstone | Dumbarton | Loan |
| 2014-07-01 | Paul McGinn | Dumbarton | Dundee FC | Free |
| 2014-01-03 | Chris Kane | St. Johnstone FC U20 | Dumbarton | Loan |
| 2013-07-01 | Paul McGinn | St. Mirren | Dumbarton | Free |