Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 09.07.2021 | V. Bayo | Celtic | Gent | N/A |
| 01.07.2021 | J. Kenny | Celtic | Everton | N/A |
| 01.07.2021 | M. Elyounoussi | Celtic | Southampton | N/A |
| 01.07.2021 | Scott Brown | Celtic | Aberdeen | Swap |
| 01.07.2021 | S. Duffy | Celtic | Brighton | N/A |
| 26.04.2021 | E. Perez | Celtic | — | N/A |
| 24.04.2021 | R. Doohan | Celtic | Dundee Utd | Free |
| 22.04.2021 | P. Klimala | Celtic | — | N/A |
| 26.03.2021 | E. Henderson | Celtic | — | Loan |
| 18.03.2021 | L. Connell | Celtic | — | Loan |
| 09.03.2021 | A. Gutman | Celtic | — | Free |
| 05.03.2021 | C. Harper | Celtic | — | N/A |
| 10.02.2021 | H. Elhamed | Celtic | Hapoel Beer Sheva | N/A |
| 01.02.2021 | O. Ntcham | Celtic | Marseille | Loan |
| 30.01.2021 | B. Coffey | Celtic | — | Loan |
| 29.01.2021 | S. Robertson | Celtic | — | Loan |
| 27.01.2021 | J. Frimpong | Celtic | Bayer Leverkusen | € 11M |
| 22.01.2021 | L. Hjelde | Celtic | — | N/A |
| 13.11.2020 | D. Church | Celtic | — | N/A |
| 29.09.2020 | J. Afolabi | Celtic | Dundee | Loan |
| 22.09.2020 | K. McInroy | Celtic | — | Loan |
| 13.09.2020 | B. Bolingoli-Mbombo | Celtic | Istanbul Basaksehir | Loan |
| 09.09.2020 | S. Robertson | Celtic | — | Loan |
| 17.08.2020 | L. O'Connor | Celtic | — | Loan |
| 15.08.2020 | M. Shved | Celtic | KV Mechelen | Loan |
| 12.08.2020 | V. Bayo | Celtic | Toulouse | Loan |
| 01.08.2020 | F. Forster | Celtic | Southampton | N/A |
| 01.08.2020 | R. Doohan | Celtic | — | Loan |
| 01.07.2020 | Kundai Leroy Jeremiah Benyu | Celtic | — | Free |
| 01.07.2020 | J. Hayes | Celtic | Aberdeen | Free |
| 01.07.2020 | E. Kouassi | Celtic | Genk | N/A |
| 01.07.2020 | M. Bauer | Celtic | — | N/A |
| 01.07.2020 | Data not available | Celtic | — | — |
| 01.07.2020 | C. Gordon | Celtic | Heart Of Midlothian | Free |
| 05.02.2020 | E. Perez | Celtic | — | Loan |
| 31.01.2020 | L. Morgan | Celtic | — | N/A |
| 31.01.2020 | G. Savoury | Celtic | — | Loan |
| 27.01.2020 | J. Afolabi | Celtic | — | Loan |
| 27.01.2020 | C. Hazard | Celtic | Dundee | Loan |
| 23.01.2020 | E. Kouassi | Celtic | Genk | Loan |
| 22.01.2020 | J. Hendry | Celtic | — | Loan |
| 21.01.2020 | L. O'Connor | Celtic | — | Loan |
| 08.01.2020 | S. Sinclair | Celtic | — | N/A |
| 24.10.2019 | C. Hazard | Celtic | Dundee | Loan |
| 02.09.2019 | E. Henderson | Celtic | — | Loan |
| 02.09.2019 | A. Ralston | Celtic | — | Loan |
| 29.08.2019 | S. Welsh | Celtic | — | N/A |
| 27.08.2019 | C. Gamboa | Celtic | VfL Bochum | Free |
| 09.08.2019 | D. Church | Celtic | — | Loan |
| 09.08.2019 | R. Deas | Celtic | — | Loan |