HJK Helsinki: every transfer in and out, fees paid and earned, squad market value, €1.2m spent and €7.8m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-24 | Nikolai Alho | A.G.S Asteras Tripolis | HJK Helsinki | Free |
| 2026-08-01 | Mads Borchers | FC Ingolstadt 04 | HJK Helsinki | Free |
| 2026-07-24 | Amara Nallo | Liverpool U21 | HJK Helsinki | Loan |
| 2026-07-22 | Brooklyn Lyons-Foster | HJK Helsinki | Derry City | Free |
| 2026-07-07 | Santeri Haarala | Djurgården | HJK Helsinki | Free |
| 2026-07-01 | Mouhamed Guèye | KV Kortrijk | HJK Helsinki | €50k |
| 2026-03-05 | M. Ritari | HJK Helsinki | Rosengård | Free |
| 2026-02-19 | Leonel Montano | Silkeborg IF | HJK Helsinki | Loan |
| 2026-02-14 | Benji Michel | HJK Helsinki | Ulsan HD | Free |
| 2026-02-13 | Matej Markovic | HNK Vukovar 1991 | HJK Helsinki | Free |
| 2026-02-09 | Mads Borchers | FC Ingolstadt 04 | HJK Helsinki | Loan |
| 2026-02-08 | Elmo Henriksson | HJK Helsinki | TPS | Free |
| 2026-02-05 | Lassi Lappalainen | Columbus Crew | HJK Helsinki | Free |
| 2026-01-23 | Georgios Kanellopoulos | HJK Helsinki | OFI Crete | Free |
| 2026-01-23 | Georgios Kanellopoulos | HJK Helsinki | OFI | Free |
| 2026-01-23 | Michael Craig | HJK Helsinki | Connecticut United | Free |
| 2026-01-03 | A. Soiniemi | HJK Helsinki | IFK Mariehamn | Free |
| 2026-01-01 | Antton Nylund | Klubi-04 | HJK Helsinki | Free |
| 2026-01-01 | Kevin Kouassivi-Benissan | HJK Helsinki | VPS | Free |
| 2025-08-25 | Ardit Tahiri | KF Llapi | HJK Helsinki | Loan |