Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 25.07.2025 | Kwon Hyeok-Kyu | Celtic | Nantes | Transfer |
| 25.07.2025 | A. Montgomery | Celtic | Livingston | Loan |
| 25.07.2025 | J. Clarke | Celtic | — | Loan |
| 24.07.2025 | J. Clarke | Celtic | — | Loan |
| 24.07.2025 | Kwon Hyeok-Kyu | Celtic | Nantes | Transfer |
| 21.07.2025 | L. Palma | Celtic | Lech Poznan | Loan |
| 20.07.2025 | L. Palma | Celtic | Lech Poznan | Loan |
| 19.07.2025 | J. Bonnar | Celtic | — | Loan |
| 19.07.2025 | S. Yamada | — | Celtic | Transfer |
| 18.07.2025 | J. Bonnar | Celtic | — | Loan |
| 17.07.2025 | S. Yamada | — | Celtic | Transfer |
| 16.07.2025 | Joe Morrison | Celtic | — | Free agent |
| 14.07.2025 | L. Agbaire | Celtic | — | Transfer |
| 11.07.2025 | N. Kühn | Celtic | Como | Transfer |
| 10.07.2025 | L. Bonetig | Celtic | — | Free agent |
| 08.07.2025 | G. Lagerbielke | Celtic | SC Braga | Transfer |
| 07.07.2025 | G. Lagerbielke | Celtic | SC Braga | Transfer |
| 05.07.2025 | M. Nawrocki | Celtic | — | Loan |
| 04.07.2025 | H. Inamura | — | Celtic | Transfer |
| 04.07.2025 | M. Nawrocki | Celtic | — | Loan |
| 01.07.2025 | R. Doohan | Aberdeen | Celtic | Free Transfer |
| 01.07.2025 | Kwon Hyeok-Kyu | Hibernian | Celtic | Back from Loan |
| 01.07.2025 | G. Lagerbielke | Twente | Celtic | Back from Loan |
| 01.07.2025 | G. Taylor | Celtic | PAOK | Free Transfer |
| 01.07.2025 | M. Tilio | — | Celtic | Back from Loan |
| 01.07.2025 | M. Tilio | — | Celtic | Back from Loan |
| 01.07.2025 | L. Palma | Olympiakos Piraeus | Celtic | Back from Loan |
| 01.07.2025 | J. Morrison | — | Celtic | Back from Loan |
| 01.07.2025 | S. Welsh | KV Mechelen | Celtic | Back from Loan |
| 01.07.2025 | K. Tierney | Arsenal | Celtic | Free Transfer |
| 01.07.2025 | S. Bain | Celtic | Falkirk | Free Transfer |
| 01.07.2025 | J. Clarke | — | Celtic | Back from Loan |
| 01.07.2025 | B. Nygren | FC Nordsjaelland | Celtic | Transfer |
| 01.07.2025 | A. Montgomery | — | Celtic | Back from Loan |
| 30.06.2025 | C. Osmand | Fulham | Celtic | Free agent |
| 30.06.2025 | S. Bain | Celtic | Falkirk | Free agent |
| 30.06.2025 | G. Taylor | Celtic | PAOK | Free agent |
| 30.06.2025 | D. Cummings | Celtic | West Ham | Free agent |
| 30.06.2025 | D. Cummings | Celtic | — | - |
| 29.06.2025 | G. Lagerbielke | Twente | Celtic | Return from loan |
| 29.06.2025 | S. Welsh | KV Mechelen | Celtic | Return from loan |
| 29.06.2025 | J. Schlupp | Celtic | Crystal Palace | Return from loan |
| 29.06.2025 | M. Tilio | — | Celtic | Return from loan |
| 29.06.2025 | B. Summers | — | Celtic | Return from loan |
| 19.06.2025 | I. English | — | Celtic | Transfer |
| 01.06.2025 | Kwon Hyeok-Kyu | Hibernian | Celtic | N/A |
| 30.05.2025 | Joe Morrison | — | Celtic | Return from loan |
| 30.05.2025 | L. Agbaire | — | Celtic | Return from loan |
| 28.02.2025 | J. Clarke | Celtic | — | Loan |
| 05.02.2025 | A. Montgomery | Celtic | — | Loan |