Cardiff City (Premier League): every transfer in and out, fees paid and earned, squad market value, €51m spent and €27m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-29 | Ethan Horvath | Cardiff | New York | Free |
| 2026-01-21 | Kion Etete | Cardiff | St. Mirren | Loan |
| 2025-09-10 | Anwar El Ghazi | Cardiff City | Al Sailiya | Free |
| 2025-09-01 | Omari Kellyman | Chelsea U21 | Cardiff | Loan |
| 2025-08-30 | Jesper Daland | Cardiff | F. Düsseldorf | Loan |
| 2025-08-27 | Yakou Méïté | Cardiff | Damac FC | Free |
| 2025-08-22 | Ethan Horvath | Cardiff | Sheff Wed | Loan |
| 2025-08-01 | Kion Etete | Cardiff | Rotherham | Loan |
| 2025-07-11 | Dimitrios Goutas | Cardiff | Genclerbirligi | Free |
| 2025-07-01 | Ronan Kpakio | Cardiff U21 | Cardiff | — |
| 2025-07-01 | Joel Colwill | Cardiff U21 | Cardiff | — |
| 2025-07-01 | Dylan Lawlor | Cardiff U21 | Cardiff | — |
| 2025-01-31 | Manolis Siopis | Cardiff | Panathinaikos | €800k |
| 2025-01-31 | Kion Etete | Cardiff | Bolton | Loan |
| 2025-01-28 | Sivert Mannsverk | Ajax | Cardiff | Loan |
| 2025-01-07 | Ryotaro Tsunoda | Cardiff | KV Kortrijk | Loan |
| 2024-09-06 | Sheyi Ojo | Cardiff City | NK Maribor | Free |
| 2024-08-20 | Jesper Daland | Cercle Brugge | Cardiff | €4.1m |
| 2024-07-30 | Wilfried Kanga | Hertha BSC | Cardiff | Loan |
| 2024-07-14 | Calum Chambers | Aston Villa | Cardiff | Free |