Celtic FC (Scottish Premiership): every transfer in and out, fees paid and earned, squad market value, €223m spent and €300m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Stephen Welsh | Celtic | Swansea | — |
| 2026-07-01 | Luis Palma | Celtic | Lech Poznan | €4m |
| 2026-07-01 | Kasper Schmeichel | Celtic | Retired | — |
| 2026-07-01 | Josh Clarke | Celtic | Partick Thistle | — |
| 2026-03-31 | Odin Thiago Holm | Celtic | Vålerenga | Loan |
| 2026-02-07 | Alex Oxlade-Chamberlain | Without Club | Celtic | — |
| 2026-02-02 | Stephen Welsh | Celtic | Motherwell FC | Loan |
| 2026-02-02 | Junior Adamu | Freiburg | Celtic | Loan |
| 2026-02-02 | Johnny Kenny | Celtic | Bolton | Loan |
| 2026-02-02 | Joel Mvuka | FC Lorient | Celtic | Loan |
| 2026-02-02 | Benjamin Arthur | Brentford | Celtic | Loan |
| 2026-02-01 | Hayato Inamura | Celtic | FC Tokyo | Loan |
| 2026-01-27 | Shin Yamada | Celtic | Pr. Münster | Loan |
| 2026-01-22 | Tomas Cvancara | Mönchengladbach | Celtic | Loan |
| 2026-01-02 | Julián Araujo | Bournemouth | Celtic | Loan |
| 2025-09-02 | Kelechi Iheanacho | Sevilla FC | Celtic | Free |
| 2025-09-01 | Stephen Welsh | Celtic | Motherwell FC | Loan |
| 2025-09-01 | Sebastian Tounekti | Hammarby | Celtic | €6.4m |
| 2025-09-01 | Adam Idah | Celtic | Swansea | €6.9m |
| 2025-08-29 | Marcelo Saracchi | Boca Juniors | Celtic | Loan |