Osasuna B: every transfer in and out, fees paid and earned, squad market value and €2m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-01 | Iñigo Arguibide | Osasuna B | CA Osasuna | — |
| 2025-08-21 | Pablo Valencia | Osasuna B | Eldense | Free |
| 2025-07-16 | Xabi Huarte | Osasuna B | Tondela | Free |
| 2025-07-01 | Rafa Fernández | Subiza | Osasuna B | — |
| 2025-07-01 | Asier Osambela | Osasuna B | CA Osasuna | — |
| 2025-01-14 | Sixtus Ogbuehi | Eldense | Osasuna B | Loan |
| 2025-01-14 | Ismael Sierra | Estoril | Osasuna B | Loan |
| 2024-08-02 | Guillem Molina | Osasuna B | UD Ibiza | Free |
| 2024-07-24 | Jorge Moreno | Osasuna B | FC Cartagena | Loan |
| 2024-07-03 | Jorge Aguirre | Osasuna B | Gil Vicente | Free |
| 2024-07-01 | Carlos Lumbreras | Subiza | Osasuna B | — |
| 2024-01-24 | Adama Boiro | Osasuna B | Bilbao Athletic | €2m |
| 2023-09-01 | Jorge Moreno | Rayo Vallecano | Osasuna B | — |
| 2023-08-15 | Max Svensson | Espanyol | Osasuna B | Loan |
| 2023-07-21 | Iván Barbero | Osasuna B | Dep. La Coruña | Free |
| 2023-07-17 | Dimitrios Stamatakis | Atl. Madrileño | Osasuna B | Free |
| 2023-07-13 | Guillem Molina | CE Sabadell | Osasuna B | Free |
| 2023-07-01 | Jorge Herrando | Osasuna B | CA Osasuna | — |
| 2023-07-01 | Jorge Aguirre | Real Sociedad B | Osasuna B | Free |
| 2023-07-01 | Jon García | FC Villarreal C | Osasuna B | Free |