IK Sirius (Allsvenskan): every transfer in and out, fees paid and earned, squad market value, €4.7m spent and €11m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Leo Walta | Sirius | Swansea | €3.4m |
| 2026-05-21 | Villy Strindlund Larsen | Sirius U19 | Sirius | — |
| 2026-05-05 | Isaac Yawe Höök | Sirius | IF Karlstad | Loan |
| 2026-03-25 | Charlie Nildén | Brommapojkarna | Sirius | €93k |
| 2026-02-04 | Mohamed Soumah | Jong KAA Gent | Sirius | €1m |
| 2026-02-02 | Leo Walta | Sirius | Swansea | Loan |
| 2026-01-29 | Odera Samuel Adindu | Hammarby | Sirius | €466k |
| 2026-01-27 | Saba Mamatsashvili | IK Sirius | Žalgiris | Free |
| 2026-01-16 | Adam Wikman | Sirius | Silkeborg IF | Loan |
| 2025-09-03 | Victor Ekström | Sirius | Mjøndalen | Loan |
| 2025-08-28 | Isaac Yawe Höök | Sirius | Enköpings SK | Loan |
| 2025-08-27 | Matthias Nartey | SC Cambuur | Sirius | — |
| 2025-08-09 | Hugo Andersson Mella | Sirius | Gefle | Loan |
| 2025-07-30 | Oscar Krusnell | Haugesund | Sirius | — |
| 2025-07-29 | Neo Jönsson | Copenhagen U19 | Sirius | €150k |
| 2025-07-25 | Ben Magnusson | IFK U19 | Sirius | Free |
| 2025-07-08 | Finlay Neat | Malmö FF U19 | Sirius | — |
| 2025-07-07 | Andreas Pyndt | Sirius | FC Fredericia | Loan |
| 2025-04-25 | Victor Svensson | Sirius | Gefle | Loan |
| 2025-04-25 | Victor Ekström | Sirius | Gefle | Loan |