Olbia (Serie C): every transfer in and out, fees paid and earned, squad market value, €250k spent and €1.3m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Player | Olbia | Ischia | Free |
| 2025-08-13 | Salvatore Di Chiara | Olbia | UC AlbinoLeffe | Free |
| 2025-08-10 | Player | Olbia | Sarrabus Ogliastra | Free |
| 2025-07-16 | Edoardo Della Salandra | Olbia | Legnago Salus | Free |
| 2025-07-15 | Player | Olbia | Le Pays du Valois | Free |
| 2025-02-05 | Player | US Livorno 1915 | Olbia | Free |
| 2025-01-31 | Player | Olbia | Scafatese | Free |
| 2025-01-21 | Daniele Ragatzu | Pontedera | Olbia | Free |
| 2025-01-16 | Player | Olbia | Budoni | Free |
| 2025-01-15 | Player | Pompei | Olbia | Free |
| 2024-12-19 | Alessandro Brancato | Olbia | Pro Imperia | Free |
| 2024-12-18 | Edoardo Della Salandra | Napoli U20 | Olbia | Free |
| 2024-09-18 | Player | Crystal Palace U21 | Olbia | Free |
| 2024-09-12 | Player | Olbia | Vado | Free |
| 2024-09-06 | Player | Olbia | Pro Sesto | Free |
| 2024-08-31 | Player | Floriana | Olbia | Free |
| 2024-08-24 | Matteo Montebugnoli | Olbia | Sestri Levante | Free |
| 2024-08-22 | Player | ETO FC | Olbia | Free |
| 2024-08-16 | Exequiel Albano Narese | Gimnasia y Tiro | Olbia | Free |
| 2024-07-25 | Player | Olbia | Poggibonsi | Free |