NK Celje: every transfer in and out, fees paid and earned, squad market value, €3.6m spent and €12m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-31 | Benjamin Verbic | APO Levadiakos Football Club | NK Celje | Free |
| 2026-07-13 | Nikita Iosifov | NK Celje | Sporting Gijón | Free |
| 2026-07-10 | Yaya Dukuly | Adelaide United | NK Celje | Free |
| 2026-07-10 | Alpha Diounkou | Omonia Nicosia | NK Celje | Free |
| 2026-07-09 | Pijus Širvys | NK Maribor | NK Celje | Free |
| 2026-07-09 | Zan Karnicnik | NK Celje | TBC | Free |
| 2026-07-09 | Zan Karnicnik | NK Celje | NK Maribor | Free |
| 2026-07-01 | Nikita Iosifov | NK Celje | TBC | Free |
| 2026-07-01 | Zan Karnicnik | NK Celje | TBC | Free |
| 2026-07-01 | Veton Tusha | Drita | NK Celje | €250k |
| 2026-07-01 | Ziga Frelih | Spartak Trnava | NK Celje | Free |
| 2026-07-01 | Matic Ivansek | NK Bravo | NK Celje | Free |
| 2026-07-01 | Leonardo Koutris | Pogon Szczecin | NK Celje | Free |
| 2026-07-01 | Juanjo Nieto | NK Celje | Castellón | Free |
| 2026-04-06 | Vitaliy Lisakovich | NK Celje | Torpedo BelAZ | Free |
| 2026-04-06 | Vitaliy Lisakovich | NK Celje | Torpedo Zhodino | Free |
| 2026-02-28 | Anomnachi Chidi | NK Celje | Sandvikens IF | Free |
| 2026-02-13 | Domagoj Vidovic | Velez | NK Celje | Free |
| 2026-01-20 | Franko Kovacevic | NK Celje | Ferencvárosi | €3m |
| 2026-01-16 | Lucas Macak | NK Celje | NK Triglav | Loan |