| 2026-09-18 | G. Kitsios | Olympiakos → Olympiakos | Raise |
| 2026-09-15 | C. Wheeler | Olympiakos → Karmiotissa | Free agent |
| 2026-09-09 | K. Prokopiou | Olympiakos → Ethnikos Latsion | Loan |
| 2026-09-08 | F. Michailidis | Olympiakos → Ethnikos Achna | Free agent |
| 2026-09-04 | Mateusz Konrad Musiałowski | Omonia Nicosia → Olympiakos | Loan |
| 2026-09-02 | M. Tamás | Diosgyori VTK → Olympiakos | Free agent |
| 2026-08-30 | O. Džepar | Olympiakos → Cosenza | Free agent |
| 2026-08-19 | Z. Savva | Torino → Olympiakos | Free agent |
| 2026-08-17 | R. Sappinen | Flora Tallinn → Olympiakos | Transfer |
| 2026-08-16 | T. Prokopiou | Olympiakos → Karmiotissa | Free agent |
| 2026-08-13 | G. Tziortzis | Apoel Nicosia → Olympiakos | Loan |
| 2026-08-13 | Andreas Frangos | Olympiakos → Akritas | Loan |
| 2026-08-06 | Miguel Esteves Sancho Pedro | Florgrade → Olympiakos | Free agent |
| 2026-08-05 | A. Christou | Omonia Nicosia → Olympiakos | Free agent |
| 2026-08-03 | Maurício | Olympiakos → Kompong Dewa | Free agent |
| 2026-08-03 | O. Džepar | Olympiakos → Dzepar Orhan | Free agent |
| 2026-08-03 | O. Džepar | Olympiakos → Cosenza | Free agent |
| 2026-07-29 | João Mário | Olympiakos → Zakynthos | Free agent |
| 2026-07-21 | G. Tocka | Olympiakos → Nestos Chrisoupolis | Free agent |
| 2026-07-20 | Georgios Okkas | Rio Ave → Olympiakos | Free agent |
| 2026-07-18 | A. Doumas | PAS Giannina → Olympiakos | Free agent |
| 2026-07-16 | Marios Praxitelous Al Herek | AEK Larnaca → Olympiakos | Loan |
| 2026-07-15 | Bruno Paz | Oţelul → Olympiakos | Free agent |
| 2026-07-15 | D. Prokop | Zeljeznicar Sarajevo → Olympiakos | Free agent |
| 2026-07-14 | R. Injgia | Olympiakos → Spaeri | Free agent |
| 2026-07-12 | Eduardo Kunde | Qabala → Olympiakos | Free agent |
| 2026-07-08 | P. Kynigopoulos | Iraklis 1908 → Olympiakos | Free agent |
| 2026-07-08 | K. Irakleous | Halkanoras → Olympiakos | Transfer |
| 2026-07-07 | João Tavares | Olympiakos → AEL | Free agent |
| 2026-06-30 | E. Stefanou | Olympiakos → Enosis | Free agent |
| 2026-06-30 | L. Konomis | Olympiakos → Apollon Limassol | Transfer |
| 2026-06-30 | V. Bradonjić | Olympiakos → Radnik Bijeljina | - |
| 2026-06-30 | Giorgos Spyrou | Olympiakos → Spartakos Kitiou | Free agent |
| 2026-06-30 | I. Pikis | Olympiakos → Pyunik Yerevan | Transfer |
| 2026-06-30 | C. Frantzis | AEL → Olympiakos | Free agent |
| 2026-06-30 | Vieirinha | Olympiakos → Zira | Free agent |
| 2026-06-30 | Andreas Frangos | Nea Salamis → Olympiakos | Free agent |
| 2026-06-30 | M. Charalampous | Olympiakos → PAEEK | Free agent |
| 2026-06-30 | Marios Athanasiou | Olympiakos → PAEEK | Free agent |
| 2026-06-30 | A. Lolis | Niki Volos → Olympiakos | Free agent |
| 2026-06-30 | Nhayson | Tarxien Rainbows → Olympiakos | Free agent |
| 2026-06-29 | M. Pechlivanis | Ethnikos Achna → Olympiakos | Free agent |
| 2026-06-29 | V. Bradonjić | Olympiakos → Bradonjic Vladimir | Free agent |
| 2026-06-29 | A. Bajrovic | Olympiakos → Bajrovic Admir | Free agent |
| 2026-06-29 | S. Charalampous | Olympiakos → Anorthosis | Return from loan |
| 2026-06-29 | R. Injgia | Olympiakos → Injgia Revazi | Free agent |
| 2026-06-29 | João Tavares | Olympiakos → Tavares Joao | Free agent |
| 2026-06-29 | P. Angeli | Olympiakos → Omonia Nicosia | Return from loan |
| 2026-06-29 | Angelos Gavriel | Ethnikos Latsion → Olympiakos | Return from loan |
| 2026-06-29 | Angelos Gavriel | Olympiakos → Gavriel Angelos | Free agent |
| 2026-06-29 | Giorgos Spyrou | Spartakos Kitiou → Olympiakos | Return from loan |
| 2026-06-29 | F. Michailidis | MEAP Nisou → Olympiakos | Return from loan |
| 2026-06-29 | R. Moreira | Olympiakos → Moreira Rui | Free agent |
| 2026-06-29 | R. Omorowa | Olympiakos → Samsunspor | Return from loan |
| 2026-06-29 | F. Eftychidis | Olympiakos → Eftychidis Filippos | Free agent |
| 2026-06-29 | F. Eftychidis | Olympiakos → ASIL Lysi | Free agent |
| 2026-06-29 | K. Prokopiou | Olympiakos → Prokopiou Konstantinos | Free agent |
| 2026-06-29 | T. Prokopiou | Olympiakos → Prokopiou Titos | Free agent |
| 2026-06-29 | A. Loucoubar | Olympiakos → Aris | Return from loan |
| 2026-06-29 | C. Efzona | Olympiakos → Pafos | Return from loan |
| 2026-06-29 | Andreas Kasartos | Olympiakos → Kasartos Andreas | Free agent |
| 2026-06-29 | Marios Athanasiou | PAEEK → Olympiakos | Return from loan |
| 2026-06-13 | I. Pikis | Olympiakos → Pyunik Yerevan | Transfer |
| 2026-01-31 | A. Christou | Olympiakos → Omonia Nicosia | Return from loan |
| 2026-01-30 | C. Wheeler | AEL → Olympiakos | Free agent |
| 2026-01-30 | V. Kovalenko | Aris → Olympiakos | Free agent |
| 2026-01-22 | N. Papakonstantinou | Olympiakos → Ethnikos Achna | Free agent |
| 2026-01-20 | A. Beggah | Olympiakos → Příbram II | - |
32M. KyriakouPortero · 23
1C. TalichmanidisPortero · 24
73Michalis VarnavaPortero
4A. DoumasDefensa · 23
3Michalis FouliasDefensa · 19
2C. FrantzisDefensa · 24
55Henrique GomesDefensa · 30
12Jean FelipeDefensa · 32
31G. KitsiosDefensa · 18
5Eduardo KundeDefensa · 28
13NhaysonDefensa · 25
23M. PechlivanisDefensa · 30
22Marios Praxitelous Al HerekDefensa · 18
24M. TamásDefensa · 32
21A. ChristouCentrocampista · 20
98K. EvripidouCentrocampista · 18
33Mateusz Konrad MusiałowskiCentrocampista · 22
6Georgios OkkasCentrocampista · 22
8Bruno PazCentrocampista · 28
10D. ProkopCentrocampista · 28
80Miguel Esteves Sancho PedroCentrocampista · 24
20G. TziortzisCentrocampista · 18
14Konstantinos EliaDelantero · 19
29K. IrakleousDelantero · 24
26P. KynigopoulosDelantero · 29
11A. LolisDelantero · 23
15R. SappinenDelantero · 29
9Zannetos SavvaCentrocampista · 20
77A. VrikkisCentrocampista · 24