Fjölnir (Besta deild): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-04-27 | Þ. Orrason | Fram | Fjölnir | Loan |
| 2026-02-05 | Kristófer Dagur Arnarsson | Fjölnir | Valur | Free |
| 2026-02-01 | Sigurjón Daði Harðarson | Fjölnir | Fram | Free |
| 2025-07-19 | Laurits Nørby | Hobro IK | Fjölnir | Free |
| 2025-07-17 | Máni Austmann Hilmarsson | Fjölnir | Fylkir | Free |
| 2025-04-30 | Þ. Orrason | Fram | Fjölnir | Loan |
| 2025-04-12 | Egill Otti Vilhjálmsson | Fram | Fjölnir | Loan |
| 2025-02-26 | Brynjar Gauti Gudjónsson | Fram | Fjölnir | Free |
| 2025-02-26 | Hilmar Elís Hilmarsson | ÍA Akranes | Fjölnir | Loan |
| 2025-02-26 | B. Berndsen | Fjölnir | ÍA Akranes | Free |
| 2025-02-09 | Jónatan Gudni Arnarsson | Fjölnir | IFK Norrköping | Free |
| 2025-02-05 | H. Georgsson | Fjölnir | KR Reykjavík | Free |
| 2025-02-01 | Ó. Thorlacius | Fjölnir | KR Reykjavík | Free |
| 2024-04-25 | Hákon Ingi Jónsson | Fjölnir | HK | Free |
| 2024-02-01 | Hans Viktor Gudmundsson | Fjölnir | KA Akureyri | Free |
| 2023-04-27 | Máni Austmann Hilmarsson | FH | Fjölnir | Free |
| 2023-03-17 | B. Berndsen | Fjölnir | Ægir | Loan |
| 2023-03-02 | V. Hafþórsson | Fjölnir | Keflavík | Free |
| 2023-02-03 | Lúkas Logi Heimisson | Fjölnir | Valur | Free |
| 2023-02-02 | Ó. Thorlacius | Grótta | Fjölnir | Free |