Mjøndalen: every transfer in and out, fees paid and earned, squad market value, €95k spent and €1.6m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-09-07 | Markus Wæhler | Lillestrøm SK | Mjøndalen | Loan |
| 2025-09-03 | Victor Ekström | Sirius | Mjøndalen | Loan |
| 2025-07-21 | Kparobo Arierhi | Lillestrøm SK | Mjøndalen | Loan |
| 2025-03-11 | Leander Øy | Sarpsborg 08 | Mjøndalen | Loan |
| 2025-02-03 | Meinhard Olsen | Mjøndalen | Kolding IF | Free |
| 2025-01-29 | Sivert Øverby | Mjøndalen | Kalmar FF | Free |
| 2024-01-31 | Sondre Granaas | Mjøndalen | Molde FK | €850k |
| 2024-01-31 | Rasmus Holten | SK Brann | Mjøndalen | Loan |
| 2023-08-02 | Rasmus Holten | SK Brann | Mjøndalen | Loan |
| 2023-07-20 | Kristian Strømland Lien | Mjøndalen | FC Groningen | €350k |
| 2023-01-01 | Sondre Granaas | Mjøndalen IF II | Mjøndalen | — |
| 2022-08-18 | Kristian Strømland Lien | Fløy | Mjøndalen | €80k |
| 2022-02-18 | Dagur Dan Thórhallsson | Mjøndalen | Breidablik | €30k |
| 2022-02-05 | Lars Olden Larsen | Mjøndalen | Nizhny Novgorod | €400k |
| 2022-01-01 | Meinhard Olsen | Bryne | Mjøndalen | Free |
| 2021-05-12 | Sivert Øverby | Fana | Mjøndalen | — |
| 2021-05-12 | Sebastian Sebulonsen | Viking FK | Mjøndalen | Loan |
| 2021-03-27 | Dagur Dan Thórhallsson | Mjøndalen | Fylkir | Loan |
| 2021-03-22 | Sondre Liseth | Mjøndalen | Haugesund | — |
| 2021-01-15 | Vetle Dragsnes | Mjøndalen | Lillestrøm SK | Free |