 Club Atlético Osasuna B |
| Founded: | 1962 |
| Official website: | www.osasuna.es |
| E-mail: | osasuna@osasuna.es |
| Manager: | Santiago CASTILLEJO |
| Name: | Instalaciones Tajonar |
| Capacity: | 4,000 |
| Primera Federación 2025/26 | |
|
| 28-Feb-2026 | 1a Fed (26) | Osasuna Promesas | 0-0 | Pontevedra |
| 07-Mar-2026 | 1a Fed (27) | Ponferradina | 0-1 | Osasuna Promesas |
| 15-Mar-2026 | 1a Fed (28) | Osasuna Promesas | 0-1 | Athletic B |
| 22-Mar-2026 | 1a Fed (29) | Tenerife | 1-0 | Osasuna Promesas |
| 29-Mar-2026 | 1a Fed (30) | Osasuna Promesas | 4-3 | Guadalajara |
| 05-Apr-2026 | 1a Fed (31) | Lugo | 0-1 | Osasuna Promesas |
| 11-Apr-2026 | 1a Fed (32) | Osasuna Promesas | 0-1 | Real Avilés |
| 19-Apr-2026 | 1a Fed (33) | Zamora | 1-0 | Osasuna Promesas |
| 25-Apr-2026 | 1a Fed (34) | Osasuna Promesas | - | Arenteiro |
| 01-May-2026 | 1a Fed (35) | Celta Fortuna | - | Osasuna Promesas |
| 10-May-2026 | 1a Fed (36) | Osasuna Promesas | - | Talavera |
| 17-May-2026 | 1a Fed (37) | Racing Ferrol | - | Osasuna Promesas |
| 24-May-2026 | 1a Fed (38) | Osasuna Promesas | - | Mérida |
