Olympiacos B: every transfer in and out, fees paid and earned, squad market value, €1.9m spent and €1.2m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-02-26 | Zain Silcott-Duberry | Olympiacos B | Sheff Wed | Free |
| 2026-01-30 | Dimitrios Siovas | Olympiacos B | Pannaxiakos | Free |
| 2025-09-12 | Bilal Mazhar | PAS Lamia | Olympiacos B | Free |
| 2025-09-10 | Zain Silcott-Duberry | Bournemouth U21 | Olympiacos B | — |
| 2025-09-10 | Angelos Argyriou | Asteras Aktor B | Olympiacos B | Free |
| 2025-08-11 | Mathieu Valbuena | Kallithea | Olympiacos B | Free |
| 2025-08-10 | Dimitrios Siovas | Without Club | Olympiacos B | — |
| 2025-07-10 | Nikolaos Zouglis | Asteras Aktor | Olympiacos B | — |
| 2025-07-10 | Konstantinos Angelakis | Asteras Aktor | Olympiacos B | €1.2m |
| 2025-07-01 | Nikolaos Gotzamanidis | Olympiacos | Olympiacos B | — |
| 2025-07-01 | Nektarios Alafakis | Olympiacos U19 | Olympiacos B | — |
| 2025-07-01 | Athanasios Koutsogoulas | Olympiacos | Olympiacos B | — |
| 2024-08-31 | Michalis Patiras | Olympiacos B | Rio Ave U23 | Free |
| 2024-08-14 | Bandiougou Fadiga | Olympiacos B | FC Lorient | €400k |
| 2024-07-11 | Angelos Argyriou | Olympiacos B | Atromitos | Free |
| 2024-07-02 | Georgios Marinos | Olympiacos B | Panserraikos | Free |
| 2024-07-01 | Nikolaos Botis | Olympiacos B | Olympiacos | — |
| 2024-07-01 | Konstantinos Kostoulas | Olympiacos B | Olympiacos | — |
| 2024-07-01 | Isidoros Koutsidis | Olympiacos B | Olympiacos | Loan |
| 2024-07-01 | Giannis Karakoutis | Olympiacos B | Without Club | — |