Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 31.08.2018 | C. Miller | Celtic | Dundee | Loan |
| 31.08.2018 | F. Benković | Leicester | Celtic | Loan |
| 24.08.2018 | R. Deas | Celtic | — | Loan |
| 17.08.2018 | D. Arzani | Manchester City | Celtic | Loan |
| 10.08.2018 | Emilio Arturo Izaguirre Girón | — | Celtic | Free |
| 12.07.2018 | R. Doohan | Celtic | — | Loan |
| 04.07.2018 | N. Çiftçi | Celtic | Genclerbirligi | Free |
| 01.07.2018 | C. Musonda | Celtic | Chelsea | N/A |
| 01.07.2018 | P. Roberts | Celtic | Manchester City | N/A |
| 01.07.2018 | O. Édouard | Paris Saint Germain | Celtic | € 10.3M |
| 01.07.2018 | Sam Wardrop | Celtic | Dundee Utd | N/A |
| 01.07.2018 | S. Allan | Hibernian | Celtic | N/A |
| 01.07.2018 | B. Watson | Celtic | Motherwell | N/A |
| 01.07.2018 | C. Hazard | Falkirk | Celtic | N/A |
| 01.07.2018 | J. Lindsay | Celtic | — | N/A |
| 01.07.2018 | R. Christie | Aberdeen | Celtic | N/A |
| 01.07.2018 | E. Sviatchenko | Celtic | FC Midtjylland | € 1M |
| 01.07.2018 | J. McCart | 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 |
| 26.06.2018 | S. Armstrong | Celtic | Southampton | N/A |
| 15.06.2018 | J. Thomson | Celtic | — | Free |
| 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 |
| 14.05.2018 | J. McCart | — | Celtic | N/A |
| 01.05.2018 | J. Thomson | — | Celtic | N/A |
| 16.03.2018 | A. Ralston | Celtic | Dundee Utd | Loan |
| 01.02.2018 | S. Allan | Celtic | Hibernian | Loan |
| 01.02.2018 | S. Bain | Dundee | Celtic | Loan |
| 01.02.2018 | J. Hendry | Dundee | Celtic | € 1.4M |
| 29.01.2018 | C. Musonda | Chelsea | Celtic | Loan |
| 25.01.2018 | C. Hazard | Celtic | Falkirk | Loan |
| 19.01.2018 | Mark Hill | Celtic | ST Mirren | Loan |
| 19.01.2018 | J. McCart | Celtic | — | Loan |
| 17.01.2018 | L. Henderson | Celtic | — | N/A |
| 16.01.2018 | E. Sviatchenko | Celtic | FC Midtjylland | Loan |
| 09.01.2018 | N. Çiftçi | Celtic | Motherwell | Loan |
| 08.01.2018 | Kundai Leroy Jeremiah Benyu | Celtic | — | Loan |
| 04.01.2018 | R. Doohan | — | Celtic | N/A |
| 02.01.2018 | R. Hendry | Celtic | — | Loan |
| 01.01.2018 | M. Compper | RB Leipzig | Celtic | N/A |
| 29.12.2017 | J. Thomson | Celtic | — | Loan |
| 23.09.2017 | J. McCart | Celtic | ST Mirren | Loan |
| 31.08.2017 | O. Édouard | Paris Saint Germain | Celtic | Loan |
| 31.08.2017 | A. Nesbitt | Celtic | — | N/A |
| 28.08.2017 | P. Roberts | Manchester City | Celtic | Loan |
| 21.08.2017 | N. Çiftçi | Celtic | — | Loan |
| 18.08.2017 | Paul-Joseph Crossan | Celtic | — | Loan |