Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 02.09.2020 | S. Duffy | Brighton | Celtic | Loan |
| 27.08.2020 | D. Turnbull | Motherwell | Celtic | N/A |
| 13.08.2020 | A. Ajeti | West Ham | Celtic | N/A |
| 30.07.2020 | V. Barkas | AEK Athens FC | Celtic | N/A |
| 01.07.2020 | J. Afolabi | — | Celtic | N/A |
| 01.07.2020 | C. Hazard | Dundee | Celtic | N/A |
| 01.07.2020 | A. Ralston | — | Celtic | N/A |
| 01.07.2020 | R. Doohan | — | Celtic | N/A |
| 01.06.2020 | K. McInroy | — | Celtic | N/A |
| 17.02.2020 | Data not available | — | Celtic | Loan |
| 01.02.2020 | Kundai Leroy Jeremiah Benyu | — | Celtic | N/A |
| 01.02.2020 | D. Church | — | Celtic | N/A |
| 24.01.2020 | E. Henderson | — | Celtic | N/A |
| 24.01.2020 | S. Welsh | — | Celtic | N/A |
| 22.01.2020 | I. Soro | — | Celtic | N/A |
| 14.01.2020 | P. Klimala | Jagiellonia | Celtic | N/A |
| 28.11.2019 | C. Hazard | Dundee | Celtic | N/A |
| 02.09.2019 | G. Taylor | Kilmarnock | Celtic | N/A |
| 30.08.2019 | M. Elyounoussi | Southampton | Celtic | Loan |
| 28.08.2019 | M. Bauer | — | Celtic | Loan |
| 22.08.2019 | F. Forster | Southampton | Celtic | Loan |
| 24.07.2019 | H. Elhamed | Hapoel Beer Sheva | Celtic | N/A |
| 04.07.2019 | B. Bolingoli-Mbombo | Rapid Vienna | Celtic | € 3.3M |
| 01.07.2019 | L. Morgan | Sunderland | Celtic | N/A |
| 01.07.2019 | M. Shved | Karpaty | Celtic | N/A |
| 01.07.2019 | Y. Mulumbu | Kilmarnock | Celtic | N/A |
| 01.07.2019 | L. Connell | — | Celtic | Free |
| 01.07.2019 | C. Hazard | — | Celtic | N/A |
| 28.06.2019 | C. Jullien | Toulouse | Celtic | € 8M |
| 22.06.2019 | A. Gutman | — | Celtic | N/A |
| 12.05.2019 | C. Miller | — | Celtic | N/A |
| 31.01.2019 | J. Toljan | Borussia Dortmund | Celtic | Loan |
| 31.01.2019 | M. Shved | Karpaty | Celtic | € 2M |
| 08.01.2019 | V. Bayo | — | Celtic | N/A |
| 07.01.2019 | T. Weah | Paris Saint Germain | Celtic | Loan |
| 05.01.2019 | O. Burke | — | Celtic | Loan |
| 31.08.2018 | Y. Mulumbu | Kilmarnock | Celtic | Free |
| 31.08.2018 | F. Benković | Leicester | Celtic | Loan |
| 17.08.2018 | D. Arzani | Manchester City | Celtic | Loan |
| 10.08.2018 | Emilio Arturo Izaguirre Girón | — | Celtic | Free |
| 01.07.2018 | O. Édouard | Paris Saint Germain | Celtic | € 10.3M |
| 01.07.2018 | S. Allan | Hibernian | Celtic | N/A |
| 01.07.2018 | C. Hazard | Falkirk | Celtic | N/A |
| 01.07.2018 | R. Christie | Aberdeen | Celtic | N/A |
| 01.07.2018 | A. Ralston | Dundee Utd | Celtic | N/A |
| 01.07.2018 | S. Bain | Dundee | Celtic | Free |
| 01.07.2018 | L. Morgan | ST Mirren | Celtic | N/A |
| 01.06.2018 | N. Çiftçi | Motherwell | Celtic | N/A |
| 14.05.2018 | Sam Wardrop | — | Celtic | N/A |
| 14.05.2018 | J. Lindsay | — | Celtic | N/A |